CN114558532B - Production method and equipment of environment-friendly benzaldehyde - Google Patents
Production method and equipment of environment-friendly benzaldehyde Download PDFInfo
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- CN114558532B CN114558532B CN202210212615.5A CN202210212615A CN114558532B CN 114558532 B CN114558532 B CN 114558532B CN 202210212615 A CN202210212615 A CN 202210212615A CN 114558532 B CN114558532 B CN 114558532B
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- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 title claims abstract description 106
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000006243 chemical reaction Methods 0.000 claims abstract description 95
- 239000002994 raw material Substances 0.000 claims abstract description 50
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 84
- 238000004821 distillation Methods 0.000 claims description 64
- 238000001816 cooling Methods 0.000 claims description 45
- 238000005070 sampling Methods 0.000 claims description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 33
- 239000001301 oxygen Substances 0.000 claims description 33
- 229910052760 oxygen Inorganic materials 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 26
- 238000007254 oxidation reaction Methods 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 7
- 239000002912 waste gas Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 8
- 230000035484 reaction time Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007810 chemical reaction solvent Substances 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004451 qualitative analysis Methods 0.000 description 3
- 238000004445 quantitative analysis Methods 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 244000144725 Amygdalus communis Species 0.000 description 1
- 235000011437 Amygdalus communis Nutrition 0.000 description 1
- 244000144730 Amygdalus persica Species 0.000 description 1
- 241000167854 Bourreria succulenta Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 244000018633 Prunus armeniaca Species 0.000 description 1
- 235000009827 Prunus armeniaca Nutrition 0.000 description 1
- 235000006040 Prunus persica var persica Nutrition 0.000 description 1
- 240000000278 Syzygium polyanthum Species 0.000 description 1
- 235000008089 Syzygium polyanthum Nutrition 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 235000020224 almond Nutrition 0.000 description 1
- 150000003934 aromatic aldehydes Chemical class 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000001327 prunus amygdalus amara l. extract Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/009—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in combination with chemical reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/28—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of CHx-moieties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method and equipment for producing environment-friendly benzaldehyde, and relates to the technical field of environment-friendly production. The method aims to solve the problems that the domestic market capacity of benzaldehyde is increasingly large at present, production enterprises are increasingly difficult to meet market demands, the fixed cost is high, the energy consumption is high, the reaction time is long, and good economic benefits cannot be brought to the enterprises. The environment-friendly benzaldehyde production method and equipment have the advantages that chemicals after mixing are fully reacted and separated through the reaction kettle, the temperature in the reaction kettle is controlled by the constant-temperature cover, the pressure in the reaction kettle is adjusted by the pressure adjusting device, the temperature mixing pressure meeting the process requirements in the reaction kettle is maintained, the reaction separation time is shortened, the reaction efficiency is greatly improved, the refined purity of benzaldehyde is effectively improved, unreacted toluene and hydrogen peroxide are recycled through the circulating pipeline, the input amount of raw materials is effectively reduced, the production cost is greatly reduced, and good economic benefits are brought to enterprises.
Description
Technical Field
The invention relates to the technical field of environment-friendly production, in particular to a production method and equipment of environment-friendly benzaldehyde.
Background
Benzaldehyde is an organic compound formed by substituting the hydrogen of benzene with an aldehyde group. Benzaldehyde is the simplest and most commonly used aromatic aldehyde in industry. It is a colorless liquid at room temperature with a distinctive almond odor. Benzaldehyde is the main component of the bitter almond oil extract, and can also be extracted from apricot, cherry, laurel leaf and peach pit. The production method and equipment of most benzaldehyde on the market still have the following problems:
1. benzaldehyde is an important organic chemical intermediate and has more applications in the industries of medicines, dyes, pesticides, spices and the like. At present, chlorination and hydrolysis of toluene are still the main production line of benzaldehyde, but the defects of low product yield, poor quality, serious pollution and the like exist, and the main aim of the national key development and environmental protection at present cannot be met;
2. at present, the domestic market capacity of benzaldehyde is increased more and more, and production enterprises are more and more difficult to satisfy the market demand, and fixed cost is high, and the energy consumption is high, and reaction time is longer, can't bring good economic benefits for enterprises.
Disclosure of Invention
The invention aims to provide a production method and equipment of environment-friendly benzaldehyde, wherein mixed chemicals are fully reacted and separated through a reaction kettle, the temperature in the reaction kettle is controlled by a constant temperature cover, the pressure in the reaction kettle is adjusted by a pressure adjusting device, the temperature and the mixed pressure in the reaction kettle meet and maintain the technological requirement, the reaction and separation time is reduced, the reaction efficiency is greatly improved, the precision purity of benzaldehyde is effectively improved, unreacted toluene and hydrogen peroxide are recycled through a circulating pipeline, the input amount of raw materials is effectively reduced, the production cost is greatly reduced, good economic benefits are brought to enterprises, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an environment-friendly benzaldehyde's production facility, including raw materials distillation mechanism, reinforced oxidation mechanism, reaction mechanism and cooling storage mechanism, raw materials distillation mechanism is provided with two, and through distillation pipeline and reinforced oxidation mechanism one side fixed connection, reinforced oxidation mechanism passes through charge-in pipeline and reaction mechanism one side fixed connection, the reaction mechanism opposite side passes through ejection of compact pipeline and cooling storage mechanism fixed connection, pipeline and raw materials distillation mechanism one side fixed connection are passed through to reaction mechanism one side, raw materials distillation mechanism, reinforced oxidation mechanism, reaction mechanism and cooling storage mechanism constitute airtight circulation system, raw materials distillation mechanism, reinforced oxidation mechanism, reaction mechanism is provided with waste gas waste material discharge pipeline respectively.
Further, raw materials distillation mechanism includes distillation case and raw material tank, and the distillation case upper surface passes through bolt and raw material tank fixed connection, and the distillation case lateral wall is provided with distillation switch and filler pipe respectively, is equipped with the distilled water in the distillation case, and distillation case upper surface center is provided with evenly distributed's through-hole, and the raw material tank lower surface sets up to high density network structure, and raw material tank one side is provided with the observation window, is provided with the scale on the observation window, and raw material tank upper surface center passes through bolt and distillation pipeline fixed connection.
Further, reinforced oxidation mechanism includes charging box and oxygen cylinder, the charging box sets up to two and respectively symmetric distribution in the oxygen cylinder both sides, the charging box upper surface is provided with the charge door respectively, gas outlet and hydrogen peroxide import, charging box lower surface center is provided with the air inlet, the air inlet passes through bolt and admission line fixed connection, admission line one side is through three way connection and distillation pipeline one side fixed connection, oxygen cylinder upper surface mounting has the hydrogen peroxide interface, hydrogen peroxide interface both sides are respectively through bolt and hydrogen peroxide pipeline fixed connection, the hydrogen peroxide pipeline is close to oxygen cylinder one side and installs the manometer, the hydrogen peroxide pipeline respectively with hydrogen peroxide import fixed connection, the gas outlet respectively with charging pipeline fixed connection.
Further, reaction mechanism sets up to reation kettle, reation kettle installs the feed inlet respectively on the surface, discharge gate and agitator motor, the feed inlet passes through bolt and charge-in pipeline fixed connection, the discharge gate passes through bolt and discharge pipeline fixed connection, the reation kettle lateral wall is provided with constant temperature hood, constant temperature hood is the upper end open-ended barrel with reation kettle looks adaptation, constant temperature hood inner wall and reation kettle outer wall interference are connected, be provided with the heating pipe in the constant temperature hood, the heating pipe is the ascending body of evenly distributed's spiral, reation kettle and the nested interference of constant temperature hood are connected, the reation kettle lateral wall sets up to the double-deck cavity cauldron body, reation kettle inner wall one side is provided with temperature-detecting device, reation kettle upper end one side is provided with manometer and pressure regulation device respectively.
Further, the agitator motor lower extreme passes through motor shaft and (mixing) shaft upper end fixed connection, the (mixing) shaft lateral wall is provided with stirring vane respectively, stirring vane symmetry respectively sets up in the (mixing) shaft both sides, adjacent stirring vane is crisscross the setting each other respectively at the (mixing) shaft lateral wall, reation kettle lower surface center is provided with the blowoff valve, reation kettle and constant temperature cover lower surface center are provided with the through-hole, through-hole inner wall and blow off pipe fixed connection, the blowoff valve is installed at the blow off pipe lower extreme, reation kettle one side is provided with the circulating line, circulating line one side respectively with raw materials distillation mechanism upper end one side fixed connection.
Further, cooling storage mechanism includes sampling case, cooling tube and rectifying column, and sampling case upper surface center passes through bolt and ejection of compact pipeline fixed connection, and sampling case one side is through blowdown pipeline and cooling tube one end fixed connection, the cooling tube other end and rectifying column upper surface one side fixed connection.
Further, be provided with the sample case in the sampling case, install the handle on the sample case, sample case both sides are provided with the translation spout, sampling case one side lower extreme is provided with the discharge opening, the discharge opening respectively with ejection of compact pipeline fixed connection, sampling case one side be provided with the fluting of sample case looks adaptation, sample case fluting inner wall both sides are provided with the translation baffle respectively, translation baffle inboard be provided with the guide rail of translation spout looks adaptation, the length and the width of sample case outer wall are less than the length and the width of sampling incasement wall respectively.
Further, the cooling pipeline is a spiral pipeline, a separation sieve plate is arranged in the rectifying tower, a slag discharge pipeline is arranged on one side of the rectifying tower, one end of the slag discharge pipeline is respectively arranged on one side of the upper end of the separation sieve plate, and the lower end of the separation sieve plate is arranged as a material storage box.
Further, the oxygen cylinder includes outer bottle and inner bottle, is provided with the heat insulating layer between outer bottle and the inner bottle, is equipped with hydrogen peroxide in the inner bottle, is provided with pipeline in the inner bottle, and inner bottle inner wall surface mounting has the push pedal motor, and push pedal motor upper end is through motor shaft and push pedal lead screw fixed connection, and the cover has the push pedal in the push pedal lead screw, and push pedal outer wall diameter is unanimous with inner bottle inner wall diameter.
The invention provides another technical scheme, and a production method of environment-friendly benzaldehyde production equipment comprises the following steps:
the method comprises the following steps: distilling through a distillation box respectively, fully reacting the distilled water vapor with chemicals in a raw material box respectively, and conveying the reacted gas to a feed box through a distillation pipeline respectively;
step two: the oxygen cylinder respectively conveys hydrogen peroxide into the feeding box through a hydrogen peroxide pipeline, deionized water is added into a feeding port, gas conveyed into the feeding box fully reacts with the hydrogen peroxide, and the mixture after reaction is respectively conveyed to the reaction kettle through the feeding pipeline;
step three: adding a catalyst into a reaction kettle, fully reacting and separating the mixture by the reaction kettle, conveying the separated hydrogen peroxide and toluene to a raw material box through a circulating pipeline for circulating distillation, and conveying the separated benzaldehyde to a sampling box through a discharge pipeline;
step four: the sampling box is used for sampling detection through the sample box, the benzaldehyde is conveyed to a cooling pipeline through a discharging pipeline for natural cooling, and the cooled benzaldehyde is conveyed to a rectifying tower through the cooling pipeline;
step five: and the rectifying tower is used for distilling and filtering impurities and catalyst residues in the cooled benzaldehyde, discharging the impurities and storing the filtered high-purity benzaldehyde.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the production method and the production equipment of the environment-friendly benzaldehyde, hydrogen peroxide in the oxygen cylinder is pushed to the conveying pipeline through the liquid pushing plate, meanwhile, the hydrogen peroxide is prevented from flowing back after being conveyed to the feeding box, the stability of the hydrogen peroxide is guaranteed, the hydrogen peroxide is distilled through the distillation box respectively, near-critical water added into the feeding port is used as a reaction solvent, the hydrogen peroxide is used as an oxygen source in the oxygen cylinder, and the gas after the distillation reaction is subjected to full oxidation reaction with the reaction solvent and the oxygen source, so that the pollution of the traditional catalyst is avoided, the emission of waste materials is reduced, the environment-friendly effect is realized, the production process is simplified, the reaction efficiency is greatly improved, and the cost is effectively reduced.
2. According to the production method and equipment of the environment-friendly benzaldehyde, the mixed chemicals are fully reacted and separated through the reaction kettle, the temperature in the reaction kettle is controlled by the constant-temperature cover, the pressure in the reaction kettle is adjusted by the pressure adjusting device, the temperature and the mixed pressure which meet and are required by the process are maintained in the reaction kettle, the reaction and separation time is reduced, the input amount of the catalyst is reduced, the catalytic effect of the catalyst is improved, the reaction efficiency is greatly improved, the fine purity of the benzaldehyde is effectively improved, the unreacted toluene and hydrogen peroxide are recycled through the circulating pipeline, the input amount of raw materials is effectively reduced, the production cost is greatly reduced, and good economic benefits are brought to enterprises.
3. According to the production method and equipment of the environment-friendly benzaldehyde, sampling analysis is carried out at intervals of certain reaction time through the sampling boxes respectively, qualitative analysis and quantitative analysis are carried out, the production quality content of the benzaldehyde is effectively guaranteed, the cooling uniformity of the benzaldehyde is guaranteed through the cooling pipeline, the denaturation of products or the blockage of the pipeline caused by crystallization during rapid cooling is avoided, impurities in the benzaldehyde are distilled and filtered through the rectifying tower, the precision of the products is improved, and the quality of the products is guaranteed.
Drawings
FIG. 1 is a perspective view of the overall construction of the present invention;
FIG. 2 is a perspective view of the feed distillation mechanism of the present invention;
FIG. 3 is an exploded perspective view of the feed distillation mechanism of the present invention;
FIG. 4 is a perspective view of a feed oxidation mechanism of the present invention;
FIG. 5 is a cross-sectional perspective view of an oxygen cylinder of the present invention;
FIG. 6 is a perspective view of a reaction mechanism of the present invention;
FIG. 7 is a perspective view of a heating tube of the present invention;
FIG. 8 is a perspective view of the stirring motor and the stirring shaft of the present invention;
fig. 9 is a perspective view of the sampling box of the present invention.
In the figure: 1. a raw material distillation mechanism; 11. a distillation box; 111. a distillation switch; 112. a water feeding pipe; 12. A raw material tank; 121. an observation window; 2. a charging oxidation mechanism; 21. a feed box; 22. an oxygen cylinder; 221. A delivery conduit; 222. a push plate screw rod; 223. a push plate motor; 224. a liquid pushing plate; 225. an outer bottle body; 226. an inner bottle body; 23. a feed inlet; 24. a hydrogen peroxide inlet; 25. an air intake duct; 26. a hydrogen peroxide interface; 27. a hydrogen peroxide conduit; 3. a reaction mechanism; 31. a reaction kettle; 32. a feed inlet; 33. A discharge port; 34. a stirring motor; 35. a blowoff valve; 36. a constant temperature cover; 37. heating a tube; 38. a stirring shaft; 39. a stirring blade; 4. a cooling and storing mechanism; 41. a sampling box; 411. a sample box; 412. a handle; 413. a translation chute; 414. a discharge hole; 42. a cooling duct; 43. a rectifying tower; 44. a discharge conduit; 5. a distillation line; 6. a feed conduit; 7. a discharge pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an environment-friendly benzaldehyde production facility includes a raw material distillation mechanism 1, two feeding oxidation mechanisms 2, a reaction mechanism 3 and a cooling storage mechanism 4, the raw material distillation mechanism 1 is fixedly connected with one side of the feeding oxidation mechanism 2 through a distillation pipeline 5, the feeding oxidation mechanism 2 is fixedly connected with one side of the reaction mechanism 3 through a feeding pipeline 6, the other side of the reaction mechanism 3 is fixedly connected with the cooling storage mechanism 4 through a discharging pipeline 7, one side of the reaction mechanism 3 is fixedly connected with one side of the raw material distillation mechanism 1 through a pipeline, the raw material distillation mechanism 1, the feeding oxidation mechanism 2, the reaction mechanism 3 and the cooling storage mechanism 4 form a closed circulation system, the raw material distillation mechanism 1, the feeding oxidation mechanism 2 and the reaction mechanism 3 are respectively provided with waste gas and waste material discharge pipelines, the whole structure is compact, the occupied area is small, the environmental suitability is strong, the sealing performance is good, the waste gas and the waste material are respectively treated through the waste gas and waste material discharge pipelines, the pertinence is strong, and the treatment efficiency is high.
Referring to fig. 2-4, the raw material distilling mechanism 1 includes a distilling box 11 and a raw material box 12, the upper surface of the distilling box 11 is fixedly connected with the raw material box 12 through bolts, the side wall of the distilling box 11 is respectively provided with a distilling switch 111 and a water feeding pipe 112, distilled water is filled in the distilling box 11, the center of the upper surface of the distilling box 11 is provided with through holes which are uniformly distributed, the lower surface of the raw material box 12 is provided with a high-density mesh structure, one side of the raw material box 12 is provided with an observation window 121, the observation window 121 is provided with a scale, the center of the upper surface of the raw material box 12 is fixedly connected with a distilling pipeline 5 through bolts, the feeding and oxidizing mechanism 2 includes two feeding boxes 21 and two oxygen bottles 22, the two feeding boxes 21 are respectively and symmetrically distributed on two sides of the oxygen bottles 22, the upper surface of the feeding box 21 is respectively provided with a feeding port 23, an air outlet and a hydrogen peroxide inlet 24, the center of the lower surface of the feeding box 21 is provided with an air inlet, the air inlet is fixedly connected with an air inlet pipeline 25 through a bolt, one side of the air inlet pipeline 25 is fixedly connected with one side of a distillation pipeline 5 through a three-way joint, the upper surface of an oxygen cylinder 22 is provided with a hydrogen peroxide interface 26, the oxygen cylinder 22 comprises an outer cylinder body 225 and an inner cylinder body 226, a heat insulation layer is arranged between the outer cylinder body 225 and the inner cylinder body 226, hydrogen peroxide is filled in the inner cylinder body 226, a conveying pipeline 221 is arranged in the inner cylinder body 226, the lower surface of the inner wall of the inner cylinder body 226 is provided with a push plate motor 223, the upper end of the push plate motor 223 is fixedly connected with a push plate screw rod 222 through a motor shaft, a liquid pushing plate 224 is sleeved on the push plate screw rod 222, the diameter of the outer wall of the liquid pushing plate 224 is consistent with the diameter of the inner wall of the inner cylinder body 226, the oxygen cylinder 22 adopts a device made of stainless steel, the hydrogen peroxide in the oxygen cylinder 22 is pushed to the conveying pipeline 221 through the liquid pushing plate 224, and meanwhile, the hydrogen peroxide is prevented from flowing back after being conveyed to a feed box 21, the stability of hydrogen peroxide is ensured, two sides of a hydrogen peroxide interface 26 are fixedly connected with a hydrogen peroxide pipeline 27 through bolts respectively, one side of the hydrogen peroxide pipeline 27 close to an oxygen cylinder 22 is provided with a pressure gauge, the hydrogen peroxide pipeline 27 is fixedly connected with a hydrogen peroxide inlet 24 respectively, an air outlet is fixedly connected with a feeding pipeline 6 respectively, the distillation is carried out through a distillation box 11 respectively, near-critical water added into a feeding port 23 is used as a reaction solvent, the oxygen cylinder 22 takes the hydrogen peroxide as an oxygen source, and the gas after the distillation reaction is fully oxidized with the reaction solvent and the oxygen source, so that the pollution of the traditional catalyst is avoided, the emission of waste materials is reduced, the environment is protected, the production process is simplified, the reaction efficiency is greatly improved, and the cost is effectively reduced;
referring to fig. 5-7, the reaction mechanism 3 is a reaction vessel 31, a feed inlet 32, a discharge outlet 33 and a stirring motor 34 are respectively installed on the upper surface of the reaction vessel 31, the feed inlet 32 is fixedly connected with the feed pipeline 6 through a bolt, the discharge outlet 33 is fixedly connected with the discharge pipeline 7 through a bolt, a constant temperature cover 36 is installed on the side wall of the reaction vessel 31, the constant temperature cover 36 is a cylinder with an upper end opening matched with the reaction vessel 31, the inner wall of the constant temperature cover 36 is in interference connection with the outer wall of the reaction vessel 31, a heating pipe 37 is installed in the constant temperature cover 36, the heating pipe 37 is a uniformly distributed upward spiral pipe, the reaction vessel 31 is in interference connection with the constant temperature cover 36 in a nested manner, the side wall of the reaction vessel 31 is a double-layer hollow vessel body, a temperature detecting device is installed on one side of the inner wall of the reaction vessel 31, a pressure gauge and a pressure adjusting device are respectively installed on one side of the upper end of the reaction vessel 31, the lower end of the stirring motor 34 is fixedly connected with the upper end of the stirring shaft 38 through a motor shaft, stirring blades 39 are respectively arranged on the side wall of the stirring shaft 38, the stirring blades 39 are respectively symmetrically arranged on the two sides of the stirring shaft 38, the adjacent stirring blades 39 are respectively arranged on the side wall of the stirring shaft 38 in a mutually staggered manner, a drain valve 35 is arranged at the center of the lower surface of the reaction kettle 31, through holes are arranged at the centers of the lower surfaces of the reaction kettle 31 and the thermostatic cover 36, the inner walls of the through holes are fixedly connected with a drain pipe, the drain valve 35 is arranged at the lower end of the drain pipe, a circulating pipeline is arranged on one side of the reaction kettle 31, one side of the circulating pipeline is respectively fixedly connected with one side of the upper end of the raw material distillation mechanism 1, the mixed chemicals are fully reacted and separated through the reaction kettle 31, the thermostatic cover 36 controls the temperature in the reaction kettle 31, the pressure adjusting device adjusts the pressure in the reaction kettle 31, and maintains the temperature mixing pressure required by the process in the reaction kettle 31, the reaction separation time is shortened, the catalyst input is reduced, the catalytic effect of the catalyst is improved, the reaction efficiency is greatly improved, the refined purity of benzaldehyde is effectively improved, unreacted toluene and hydrogen peroxide are recycled through a circulating pipeline, the input amount of raw materials is effectively reduced, the production cost is greatly reduced, and good economic benefits are brought to enterprises;
referring to fig. 8-9, the cooling and storing mechanism 4 includes a sampling box 41, a cooling pipeline 42 and a rectifying tower 43, the center of the upper surface of the sampling box 41 is fixedly connected with a discharging pipeline 7 through a bolt, one side of the sampling box 41 is fixedly connected with one end of the cooling pipeline 42 through a discharging pipeline 44, the other end of the cooling pipeline 42 is fixedly connected with one side of the upper surface of the rectifying tower 43, a sample box 411 is arranged in the sampling box 41, a handle 412 is arranged on the sample box 411, a translational sliding chute 413 is arranged on two sides of the sample box 411, a discharging hole 414 is arranged at the lower end of one side of the sampling box 41, the discharging hole 414 is respectively fixedly connected with the discharging pipeline 7, a slot matched with the sample box 411 is arranged on one side of the sampling box 41, translational guide plates are respectively arranged on two sides of the inner wall of the slot of the sample box 411, guide rails matched with the translational sliding chute 413 are arranged on the inner side of the translational guide plates, the length and the width of sample case 411 outer wall are less than the length and the width of sampling case 41 inner wall respectively, cooling tube 42 is the heliciform pipeline, be provided with the separation sieve in the rectifying column 43, rectifying column 43 one side is provided with row's sediment pipeline, arrange sediment pipeline one end and set up respectively in separation sieve upper end one side, separation sieve lower extreme sets up to the storage case, carry out sample analysis through sampling case 41 certain reaction time at interval respectively, carry out qualitative and quantitative analysis, the effectual production matter content who guarantees benzaldehyde, cooling tube 42 guarantees the cooling homogeneity of benzaldehyde, avoid the rapid cooling to appear the crystallization and cause the degeneration of product, or cause the jam of pipeline, rectifying column 43 distills the impurity in the benzaldehyde and filters, the precision of product has been improved, guarantee product quality.
The production method of the environment-friendly benzaldehyde production equipment comprises the following steps:
the method comprises the following steps: the water vapor is distilled through the distillation boxes 11 respectively, the distilled water vapor fully reacts with chemicals in the raw material boxes 12 respectively, and the reacted gas is conveyed to the feeding boxes 21 through the distillation pipelines 5 respectively;
step two: the oxygen cylinder 22 respectively conveys hydrogen peroxide into the feed box 21 through a hydrogen peroxide pipeline 27, deionized water is added into the feed port 23, the gas conveyed into the feed box 21 fully reacts with the hydrogen peroxide, and the reacted mixture is respectively conveyed to the reaction kettle 31 through a feed pipeline 6;
step three: adding a catalyst into a reaction kettle 31, fully reacting and separating the mixture by the reaction kettle 31, conveying the separated hydrogen peroxide and toluene to a raw material box 12 through a circulating pipeline for circulating distillation, and conveying the separated benzaldehyde to a sampling box 41 through a discharge pipeline 7;
step four: the sampling box 41 performs sampling detection through the sample box 411, benzaldehyde is conveyed to the cooling pipeline 42 through the discharging pipeline 44 for natural cooling, and the cooled benzaldehyde is conveyed to the rectifying tower 43 through the cooling pipeline 42;
step five: the rectifying tower 43 distills and filters impurities and catalyst residues in the cooled benzaldehyde, discharges the impurities, and stores the filtered high-purity benzaldehyde.
In conclusion, the environment-friendly benzaldehyde production method and equipment have the advantages that the raw material distillation mechanism 1, the feeding oxidation mechanism 2, the reaction mechanism 3 and the cooling storage mechanism 4 form a closed circulation system, the whole structure is compact, the occupied area is small, the environmental adaptability is strong, the sealing performance is good, the waste gas and the waste are separately treated through the waste gas and waste material discharge pipeline, the pertinence is strong, the treatment efficiency is high, the hydrogen peroxide in the oxygen cylinder 22 is pushed to the conveying pipeline 221 through the liquid pushing plate 224, meanwhile, the hydrogen peroxide is prevented from being conveyed to the feeding box 21 and then reflowing, the stability of the hydrogen peroxide is ensured, the distillation box 11 is used for distilling respectively, the near-critical water added into the feeding port 23 is used as a reaction solvent, the oxygen cylinder 22 uses the hydrogen peroxide as an oxygen source, the gas after the distillation reaction is subjected to full oxidation reaction with the reaction solvent and the oxygen source, the pollution of the traditional catalyst is avoided, and the waste material discharge is reduced, more environment-friendly, the production process is simplified, the reaction efficiency is greatly improved by people, the cost is effectively reduced, the mixed chemicals are fully reacted and separated through the reaction kettle 31, the temperature in the reaction kettle 31 is controlled by the constant temperature cover 36, the pressure in the reaction kettle 31 is adjusted by the pressure adjusting device, the temperature mixing pressure meeting the process requirement is maintained in the reaction kettle 31, the reaction separation time is reduced, the input amount of the catalyst is reduced, the catalytic effect of the catalyst is improved, the reaction efficiency is greatly improved, the refined purity of benzaldehyde is effectively improved, the unreacted toluene and hydrogen peroxide are recycled through the circulating pipeline, the input amount of raw materials is effectively reduced, the production cost is greatly reduced, good economic benefits are brought to enterprises, and sampling analysis is carried out through the sampling boxes 41 at certain reaction time intervals, carry out qualitative and quantitative analysis, the effectual production quality content who guarantees benzaldehyde, cooling tube 42 guarantees benzaldehyde's cooling homogeneity, avoids the rapid cooling to appear the crystallization and causes the denaturation of product, or causes the jam of pipeline, and rectifying column 43 is with the impurity in the benzaldehyde and catalyst residue carry out the distillation filtration, has improved the precision of product, guarantees product quality.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (2)
1. The utility model provides an environment-friendly benzaldehyde's production facility, includes raw materials distillation mechanism (1), reinforced oxidation mechanism (2), reaction mechanism (3) and cooling storage mechanism (4), its characterized in that: the two raw material distillation mechanisms (1) are fixedly connected with one side of the feeding oxidation mechanism (2) through a distillation pipeline (5), the feeding oxidation mechanism (2) is fixedly connected with one side of the reaction mechanism (3) through a feeding pipeline (6), the other side of the reaction mechanism (3) is fixedly connected with the cooling storage mechanism (4) through a discharging pipeline (7), one side of the reaction mechanism (3) is fixedly connected with one side of the raw material distillation mechanism (1) through a pipeline, the raw material distillation mechanism (1), the feeding oxidation mechanism (2), the reaction mechanism (3) and the cooling storage mechanism (4) form a closed circulating system, and the raw material distillation mechanism (1), the feeding oxidation mechanism (2) and the reaction mechanism (3) are respectively provided with waste gas and waste material discharge pipelines;
the raw material distillation mechanism (1) comprises a distillation box (11) and a raw material box (12), the upper surface of the distillation box (11) is fixedly connected with the raw material box (12) through bolts, a distillation switch (111) and a water adding pipe (112) are respectively arranged on the side wall of the distillation box (11), distilled water is filled in the distillation box (11), through holes which are uniformly distributed are formed in the center of the upper surface of the distillation box (11), the lower surface of the raw material box (12) is of a high-density net-shaped structure, an observation window (121) is formed in one side of the raw material box (12), a graduated scale is arranged on the observation window (121), and the center of the upper surface of the raw material box (12) is fixedly connected with a distillation pipeline (5) through bolts;
the feeding and oxidizing mechanism (2) comprises a feeding box (21) and an oxygen bottle (22), the feeding box (21) is arranged to be two and symmetrically distributed on two sides of the oxygen bottle (22) respectively, the upper surface of the feeding box (21) is provided with a feeding port (23), an air outlet and a hydrogen peroxide inlet (24) respectively, the center of the lower surface of the feeding box (21) is provided with an air inlet, the air inlet is fixedly connected with an air inlet pipeline (25) through a bolt, one side of the air inlet pipeline (25) is fixedly connected with one side of a distillation pipeline (5) through a three-way joint, the upper surface of the oxygen bottle (22) is provided with a hydrogen peroxide interface (26), two sides of the hydrogen peroxide interface (26) are fixedly connected with a hydrogen peroxide pipeline (27) through bolts respectively, one side of the hydrogen peroxide pipeline (27) close to the oxygen bottle (22) is provided with a pressure gauge, the hydrogen peroxide pipeline (27) is fixedly connected with the hydrogen peroxide inlet (24) respectively, and the air outlet is fixedly connected with the feeding pipeline (6) respectively;
the oxygen bottle (22) comprises an outer bottle body (225) and an inner bottle body (226), a heat insulation layer is arranged between the outer bottle body (225) and the inner bottle body (226), hydrogen peroxide is filled in the inner bottle body (226), a conveying pipeline (221) is arranged in the inner bottle body (226), a push plate motor (223) is installed on the lower surface of the inner wall of the inner bottle body (226), the upper end of the push plate motor (223) is fixedly connected with a push plate screw rod (222) through a motor shaft, a liquid pushing plate (224) is sleeved on the push plate screw rod (222), and the diameter of the outer wall of the liquid pushing plate (224) is consistent with that of the inner wall of the inner bottle body (226);
the reaction mechanism (3) is arranged to be a reaction kettle (31), a feed inlet (32), a discharge outlet (33) and a stirring motor (34) are respectively installed on the upper surface of the reaction kettle (31), the feed inlet (32) is fixedly connected with a feed pipeline (6) through a bolt, the discharge outlet (33) is fixedly connected with a discharge pipeline (7) through a bolt, a constant temperature cover (36) is arranged on the side wall of the reaction kettle (31), the constant temperature cover (36) is a cylinder with an upper end opening matched with the reaction kettle (31), the inner wall of the constant temperature cover (36) is in interference connection with the outer wall of the reaction kettle (31), a heating pipe (37) is arranged in the constant temperature cover (36), the heating pipe (37) is a spiral upward pipe body which is uniformly distributed, the reaction kettle (31) is in interference connection with the constant temperature cover (36) in a nested manner, the side wall of the reaction kettle (31) is arranged to be a double-layer hollow kettle body, a temperature detection device is arranged on one side of the inner wall of the reaction kettle (31), and a pressure meter and a pressure regulation device are respectively arranged on one side of the upper end of the reaction kettle (31);
the lower end of a stirring motor (34) is fixedly connected with the upper end of a stirring shaft (38) through a motor shaft, the side wall of the stirring shaft (38) is respectively provided with stirring blades (39), the stirring blades (39) are respectively and symmetrically arranged on two sides of the stirring shaft (38), the adjacent stirring blades (39) are respectively arranged on the side wall of the stirring shaft (38) in a mutually staggered manner, the center of the lower surface of a reaction kettle (31) is provided with a drain valve (35), the centers of the lower surfaces of the reaction kettle (31) and a constant temperature cover (36) are provided with through holes, the inner walls of the through holes are fixedly connected with a drain pipe, the drain valve (35) is arranged at the lower end of the drain pipe, one side of the reaction kettle (31) is provided with a circulating pipeline, and one side of the circulating pipeline is fixedly connected with one side of the upper end of a raw material distillation mechanism (1);
the cooling storage mechanism (4) comprises a sampling box (41), a cooling pipeline (42) and a rectifying tower (43), the center of the upper surface of the sampling box (41) is fixedly connected with the discharge pipeline (7) through a bolt, one side of the sampling box (41) is fixedly connected with one end of the cooling pipeline (42) through a discharge pipeline (44), and the other end of the cooling pipeline (42) is fixedly connected with one side of the upper surface of the rectifying tower (43); the cooling pipeline (42) is a spiral pipeline, a separation sieve plate is arranged in the rectifying tower (43), a slag discharge pipeline is arranged on one side of the rectifying tower (43), one end of the slag discharge pipeline is respectively arranged on one side of the upper end of the separation sieve plate, and the lower end of the separation sieve plate is arranged as a material storage box;
be provided with sample case (411) in sampling case (41), install handle (412) on sample case (411), sample case (411) both sides are provided with translation spout (413), sampling case (41) one side lower extreme is provided with discharge opening (414), discharge opening (414) and ejection of compact pipeline (7) fixed connection, sampling case (41) one side is provided with the fluting with sample case (411) looks adaptation, sample case (411) fluting inner wall both sides are provided with the translation baffle respectively, translation baffle inboard is provided with the guide rail with translation spout (413) looks adaptation, the length and the width of sample case (411) outer wall are less than the length and the width of sampling case (41) inner wall respectively.
2. The production method of the environment-friendly benzaldehyde production equipment as claimed in claim 1, which is characterized in that: the method comprises the following steps:
the method comprises the following steps: the distilled water is distilled through a distillation box (11), the distilled water vapor is fully reacted with chemicals in a raw material box (12), and the reacted gas is conveyed to a feed box (21) through a distillation pipeline (5);
step two: the oxygen cylinder (22) respectively conveys hydrogen peroxide into the feed box (21) through a hydrogen peroxide pipeline (27), deionized water is added into the feed port (23), the gas conveyed into the feed box (21) fully reacts with the hydrogen peroxide, and the reacted mixture is respectively conveyed to the reaction kettle (31) through a feed pipeline (6);
step three: adding a catalyst into a reaction kettle (31), fully reacting and separating the mixture by the reaction kettle (31), conveying the separated hydrogen peroxide and toluene to a raw material box (12) through a circulating pipeline for circulating distillation, and conveying the separated benzaldehyde to a sampling box (41) through a discharge pipeline (7);
step four: the sampling box (41) performs sampling detection through the sample box (411), benzaldehyde is conveyed to a cooling pipeline (42) through a discharge pipeline (44) for natural cooling, and the cooling pipeline (42) conveys the cooled benzaldehyde to a rectifying tower (43);
step five: the rectifying tower (43) distills and filters impurities and catalyst residues in the cooled benzaldehyde, discharges the impurities, and stores the filtered high-purity benzaldehyde.
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| CN106892802A (en) * | 2017-03-29 | 2017-06-27 | 钦州学院 | A kind of device of preparing benzaldehyde by oxidizing toluene |
| CN107032969A (en) * | 2017-05-25 | 2017-08-11 | 钦州学院 | The technique that a kind of liquid-phase oxidation of toluene prepares benzaldehyde |
| CN206508976U (en) * | 2017-01-20 | 2017-09-22 | 重庆市卓诺科技发展有限公司 | A kind of polyoxyethylene laurel ether process units |
| CN215694061U (en) * | 2021-06-21 | 2022-02-01 | 唐林 | Case is deposited with sample to clinical laboratory of hospital |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101138729A (en) * | 2007-10-13 | 2008-03-12 | 兰州大学 | Catalyzer for liquid-phase catalytic oxidation producing of chlorobenzaldehyde by using p-chlorotoluene |
| CN206508976U (en) * | 2017-01-20 | 2017-09-22 | 重庆市卓诺科技发展有限公司 | A kind of polyoxyethylene laurel ether process units |
| CN106892802A (en) * | 2017-03-29 | 2017-06-27 | 钦州学院 | A kind of device of preparing benzaldehyde by oxidizing toluene |
| CN107032969A (en) * | 2017-05-25 | 2017-08-11 | 钦州学院 | The technique that a kind of liquid-phase oxidation of toluene prepares benzaldehyde |
| CN215694061U (en) * | 2021-06-21 | 2022-02-01 | 唐林 | Case is deposited with sample to clinical laboratory of hospital |
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