CN107286022A - The method and device of dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose - Google Patents
The method and device of dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose Download PDFInfo
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- CN107286022A CN107286022A CN201710457492.0A CN201710457492A CN107286022A CN 107286022 A CN107286022 A CN 107286022A CN 201710457492 A CN201710457492 A CN 201710457492A CN 107286022 A CN107286022 A CN 107286022A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/62—Preparation of compounds containing amino groups bound to a carbon skeleton by cleaving carbon-to-nitrogen, sulfur-to-nitrogen, or phosphorus-to-nitrogen bonds, e.g. hydrolysis of amides, N-dealkylation of amines or quaternary ammonium compounds
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- C—CHEMISTRY; METALLURGY
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
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Abstract
The present invention relates to the method and device that dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose, comprise the following steps：First, take off light：Waste water enters lightness-removing column through flux modification, after preheating and carries out lock out operation, and overhead extraction ethyl acetate solution goes ethyl acetate to recycle, and bottom of towe extraction dimethylformamide and water go alkaline hydrolysis kettle to handle；2nd, alkaline hydrolysis：The Produced Liquid of lightness-removing column bottom of towe, into alkaline hydrolysis kettle, adds liquid caustic soda regulation pH in 9 14, heating stirring until dimethylformamide all decomposition, are refined subsequently into dimethylamine rectifying column by preheating；3rd, dimethylamine is refined：Dimethylamine is separated with rectifying means, dimethylamine is enriched with tower top, and ammonia nitrogen in waste water content and the COD contents of bottom of towe are greatly lowered.Beneficial effect is：Tailing water analysis result COD ＜ 200, kjeldahl nitrogen ＜ 20 after present invention processing, are neutralized to neutrality by cooling, it is possible to enter sewage disposal, completely solve the problem that high kjeldahl nitrogen is caused to sewage disposal system.
Description
Technical field
Production technology is aided in the present invention relates to a kind of Sucralose, it is more particularly to a kind of from the high kjeldahl nitrogen waste water of Sucralose
The middle method and device for extracting dimethylamine, dimethylamine is extracted by using alkaline hydrolysis plus rectifying from the high kjeldahl nitrogen waste water of Sucralose
Method.
Background technology
The waste water of high kelvin nitrogen content is produced in the production process of Sucralose, amount is big and intractability is also big, specific table
Its present organic nitrogen content is high, and the method such as general stripping, biochemistry is hard to work.Kelvin nitrogen content is up to thousands of milligrams per liter,
And the standard of environmental requirement discharge is less than 30 milligrams/every liter.
High kjeldahl nitrogen waste water in sucrose trichloride production process has three strands：
First strand be the MVR devices for reclaiming dilute DMF dehydrating tower ejection material（Neutralization in sucrose trichloride production process is dense
Dilute DMF after contracting carries out the tower top water outlet after multiple-effect evaporation MVR processing）
Second strand be the MVR devices for reclaiming dilute DMF distillation water pot（After neutralization concentration in sucrose trichloride production process
Dilute DMF carry out multiple-effect evaporation MVR processing after distilled water）
3rd strand is triple-effect evaporation plant water outlet（Extraction wastewater evaporation condensed water in sucrose trichloride production process）
This three bursts of material component complexity, containing compositions such as ethyl acetate, methanol, DMF, acetic acid, its COD and kjeldahl nitrogen Content
It is very high.
For example：On March 14th, 2017 analyzes first strand of water
COD：4966mg/kg kjeldahl nitrogens：1625mg/L DMF：2.82% methanol：0.83%
On March 7th, 2017 analyzes second strand of water
COD：10080mg/kg kjeldahl nitrogens：5840mg/L DMF：1.82% methanol：1.69%
On March 21st, 2017 analyzes the 3rd strand of water
COD：33500mg/kg kjeldahl nitrogens：737mg/L DMF：5.43% methanol：0.84% ethyl acetate：4.28%
Butyl acetate：0.23%.
In order to capture this water process problem, furtherd investigate first, the reason for have found high ammonia-nitrogen content, and innovate
Propose the method that dimethylamine is extracted in alkaline hydrolysis plus rectifying from the high kjeldahl nitrogen waste water of Sucralose.
It is the presence of dimethylformamide i.e. DMF the reason for high kjeldahl nitrogen in waste water, its chemical property is stable, boils up till
150 DEG C, the method for conventional processing ammonia nitrogen waste water is invalid to its.Chinese patent literature Publication No. CN104910020A, it is open
One kind《The method that dimethylamine is reclaimed from Sucralose production waste water》, including step：In dimethylamine hydrochloride containing 10-30%
And 1-5%N, strong alkaline substance is added in the waste water of dinethylformamide, and it is production in the middle of 10-30% to obtain dimethylamine concentration
Thing；Middle product rectification is purified and obtains the dimethylamine solution that concentration is more than 35%.Technical scheme low energy consumption, few throwing
Provide, economic benefit can be produced, dimethylamine has been reclaimed while ammonia nitrogen waste water is handled, to enterprise with very strong practicality and very
Good economic serviceability.But, it is not pre-processed before highly basic is added, and causes the ethyl acetate in waste water etc. light
Component is not separated in advance, and the COD of waste water is higher, is unfavorable for follow-up PROCESS FOR TREATMENT.
The content of the invention
The drawbacks described above that the purpose of the present invention is present aiming at prior art is there is provided one kind from the high kjeldahl nitrogen of Sucralose
The method and device of dimethylamine is extracted in waste water, first by de- light, the light components such as the ethyl acetate in waste water are separated；
It is again dimethylamine by its alkaline hydrolysis, the low boiling point of dimethylamine, is easily separated, rectifying column tower top dimethylamine with negative pressure rectificating method by 7 DEG C
Enrichment extraction dimethylamine finished product, turns waste into wealth, the reduction of bottom of towe ammonia nitrogen class material, ammonia-nitrogen content reduction so that waste water is easily processed.
The method that dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose that the present invention is mentioned, including following step
Suddenly：
First, take off light：Waste water is through flux modification, into lightness-removing column progress lock out operation after preheating, overhead extraction ethyl acetate solution,
Ethyl acetate is gone to recycle, bottom of towe extraction dimethylformamide and water go alkaline hydrolysis kettle to handle；
2nd, alkaline hydrolysis：The Produced Liquid of lightness-removing column bottom of towe enters alkaline hydrolysis kettle by preheating, adds liquid caustic soda and adjusts pH in 9-14, heating is stirred
Mix until dimethylformamide all decomposition, are refined subsequently into dimethylamine rectifying column；
3rd, dimethylamine is refined：Dimethylamine is separated with rectifying means, dimethylamine is enriched with tower top, the ammonia nitrogen in waste water of bottom of towe
Content is greatly lowered with COD contents.
It is preferred that, above-mentioned de- light comprises the concrete steps that：
Waste water enters lightness-removing column after flux modification, after preheating and carries out lock out operation, and waste water enters de- from lightness-removing column T-101 tower tops
Light tower, the ethyl ester in material by the steam after lightness-removing column reboiler E-102 circulating and evaporatings, constantly carried secretly and discharged, steam warp
After condenser of light component removal column E-101 condensations, collect into ethyl acetate tank V-101, be delivered to through lightness-removing column extraction pump P-105A/B
Keep in tank field；Lightness-removing column tower bottoms is mainly water and dimethylformamide, and neutralization is delivered to through lightness-removing column tower reactor pump P-103A/B
Reactor R-101A/B carries out dimethylformamide decomposition reaction.
It is preferred that, above-mentioned lightness-removing column T-101 is stripper.
It is preferred that, above-mentioned alkaline hydrolysis is comprised the concrete steps that：
Lightness-removing column tower bottoms is delivered to neutralization reaction kettle R-101A/B through pump P-103, and liquid caustic soda is delivered to R- through out-of-bounds delivery pump
101A/B, regulation reactor material pH value is 9；Heating stirring is until dimethylformamide all decomposition, neutralization reaction kettle R-
101A/B materials are delivered to dimethylamine rectifying column T-102 through dimethylamine rectifying column feed pump P-101A/B and carry out lock out operation.
It is preferred that, above-mentioned dimethylamine is refined to be comprised the concrete steps that：
Dimethylamine rectifying column T-102 is operated using normal pressure continuous rectification, and dimethylamine rectifying column T-102 overhead vapours is through dimethylamine essence
Collected after evaporating tower condenser E-103A/B condensations to dimethylamine rectifier column reflux tank V-102；Dimethylamine rectifier column reflux tank V-102
In material conveyed through dimethylamine rectifier column reflux pump P-104A/B, be partly refluxed to dimethylamine rectifying column T-102, part is produced
It is temporary to tank field；Dimethylamine rectifying column T-102 overhead extractions material is 40% dimethylamine solution, dimethylamine rectifying column T-102 tower reactors
Circulating and evaporating is carried out using dimethylamine rectifying column reboiler E-104；Tower bottoms is defeated through dimethylamine tower bottom of rectifying tower pump P-102A/B
Send, deliver to treatment tank.
It is preferred that, above-mentioned dimethylamine rectifying column T-102 operating conditions：93 ± 1 DEG C of tower top temperature, 100 ± 2 DEG C of tower reactor, behaviour
Make pressure for normal pressure；Dimethylamine rectifying column reboiler E-104 is vertical thermosiphon reboiler, and heat transferring medium is 4kgf/cm2's
Saturated vapor.
The device of dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose that the present invention is mentioned, including it is de- with light packs
Put, alkaline hydrolysis device and dimethylamine refining plant, wherein, it is described de- with light packs to put including lightness-removing column T-101, lightness-removing column reboiler E-
102nd, condenser of light component removal column E-101, ethyl acetate tank V-101, lightness-removing column tower reactor pump P-103 and lightness-removing column extraction pump P-105A/
B, the lightness-removing column T-101 top are connected to ethyl acetate tank V-101 by condenser of light component removal column E-101, and ethyl ester passes through de-
Light tower extraction pump P-105A/B is output to tank field；The bottom side of the lightness-removing column T-101 is provided with lightness-removing column reboiler E-102,
Lightness-removing column T-101 bottom is provided with lightness-removing column tower reactor pump P-103, and dimethylformamide is conveyed through lightness-removing column tower reactor pump P-103A/B
To alkaline hydrolysis device；The alkaline hydrolysis device uses neutralization reaction kettle R-101A/B；
The dimethylamine refining plant includes dimethylamine rectifying column T-102, dimethylamine rectifying column condenser E-103A/B, dimethylamine
Rectifier column reflux tank V-102 and dimethylamine rectifying column reboiler E-104, dimethylamine rectifying column T-102 top passes through dimethylamine
Two are installed on the downside of rectifying column condenser E-103A/B connection dimethylamine rectifier column reflux tank V-102, dimethylamine rectifying column T-102
Methylamine rectifying column reboiler E-104.
It is preferred that, above-mentioned dimethylamine rectifier column reflux tank V-102 bottom connection dimethylamine rectifier column reflux pump P-104A/
B。
It is preferred that, above-mentioned dimethylamine rectifying column T-102 bottom is connected with dimethylamine tower bottom of rectifying tower pump P-102A/B.
The beneficial effects of the invention are as follows：The reason for present invention have found high ammonia-nitrogen content, and innovate the alkaline hydrolysis that proposes add
The method that dimethylamine is extracted in rectifying from the high kjeldahl nitrogen waste water of Sucralose, this method is dimethylamine, diformazan first by its alkaline hydrolysis
The low boiling point of amine, is very easy to be separated with negative pressure rectificating method by 7 DEG C, rectifying column tower top dimethylamine enrichment extraction dimethylamine finished product,
Turn waste into wealth, the reduction of bottom of towe ammonia nitrogen class material, ammonia-nitrogen content reduction so that waste water is easily processed；
Tailing water analysis result COD ＜ 200, kjeldahl nitrogen ＜ 20 after present invention processing, neutrality is neutralized to by cooling, so that it may
To enter sewage disposal, the problem that high kjeldahl nitrogen is caused to sewage disposal system is completely solved.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
The method that dimethylamine is extracted in embodiment 1, a kind of high kjeldahl nitrogen waste water from Sucralose that the present invention is mentioned, including
Following steps：
First, take off light：Waste water is through flux modification, into lightness-removing column progress lock out operation after preheating, overhead extraction ethyl acetate solution,
Ethyl acetate is gone to recycle, bottom of towe extraction dimethylformamide and water go alkaline hydrolysis kettle to handle；
2nd, alkaline hydrolysis：The Produced Liquid of lightness-removing column bottom of towe enters alkaline hydrolysis kettle by preheating, adds liquid caustic soda and adjusts pH in 9-14, heating is stirred
Mix until dimethylformamide all decomposition, are refined subsequently into dimethylamine rectifying column；
3rd, dimethylamine is refined：Dimethylamine is separated with rectifying means, dimethylamine is enriched with tower top, the ammonia nitrogen in waste water of bottom of towe
Content is greatly lowered with COD contents.
Wherein, light comprise the concrete steps that is taken off：
Waste water a enters lightness-removing column after flux modification, after preheating and carries out lock out operation, and waste water enters from lightness-removing column T-101 tower tops
Lightness-removing column, lightness-removing column T-101 is stripper, by the steam after lightness-removing column reboiler E-102 circulating and evaporatings, constantly by material
Ethyl ester entrainment discharging, steam through condenser of light component removal column E-101 condense after, collect into ethyl acetate tank V-101, through lightness-removing column
Extraction pump P-105A/B is delivered to tank field and kept in；Lightness-removing column tower bottoms is mainly water and dimethylformamide, through lightness-removing column tower reactor
Pump P-103A/B is delivered to neutralization reaction kettle R-101A/B and carries out dimethylformamide decomposition reaction.
Alkaline hydrolysis is comprised the concrete steps that：
Lightness-removing column tower bottoms is delivered to neutralization reaction kettle R-101A/B, liquid caustic soda b through pump P-103 and is delivered to R- through out-of-bounds delivery pump
101A/B, regulation reactor material pH value is 9；Heating stirring is until dimethylformamide all decomposition, neutralization reaction kettle R-
101A/B materials are delivered to dimethylamine rectifying column T-102 through dimethylamine rectifying column feed pump P-101A/B and carry out lock out operation.
Dimethylamine is refined to be comprised the concrete steps that：
Dimethylamine rectifying column T-102 is operated using normal pressure continuous rectification, and dimethylamine rectifying column T-102 overhead vapours is through dimethylamine essence
Collected after evaporating tower condenser E-103A/B condensations to dimethylamine rectifier column reflux tank V-102；Dimethylamine rectifier column reflux tank V-102
In material conveyed through dimethylamine rectifier column reflux pump P-104A/B, be partly refluxed to dimethylamine rectifying column T-102, part is produced
It is temporary to tank field；Dimethylamine rectifying column T-102 overhead extractions material is 40% dimethylamine solution, dimethylamine rectifying column T-102 tower reactors
Circulating and evaporating is carried out using dimethylamine rectifying column reboiler E-104；Tower bottoms is defeated through dimethylamine tower bottom of rectifying tower pump P-102A/B
Send, deliver to treatment tank.
Wherein, above-mentioned dimethylamine rectifying column T-102 operating conditions：93 ± 1 DEG C of tower top temperature, 100 ± 2 DEG C of tower reactor, operation
Pressure is normal pressure；Dimethylamine rectifying column reboiler E-104 is vertical thermosiphon reboiler, and heat transferring medium is the full of 4kgf/cm2
And steam.
The device of dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose that the present invention is mentioned, including it is de- with light packs
Put, alkaline hydrolysis device and dimethylamine refining plant, wherein, it is described de- with light packs to put including lightness-removing column T-101, lightness-removing column reboiler E-
102nd, condenser of light component removal column E-101, ethyl acetate tank V-101, lightness-removing column tower reactor pump P-103 and lightness-removing column extraction pump P-105A/
B, the lightness-removing column T-101 top are connected to ethyl acetate tank V-101 by condenser of light component removal column E-101, and ethyl ester passes through de-
Light tower extraction pump P-105A/B is output to tank field；The bottom side of the lightness-removing column T-101 is provided with lightness-removing column reboiler E-102,
Lightness-removing column T-101 bottom is provided with lightness-removing column tower reactor pump P-103, and dimethylformamide is conveyed through lightness-removing column tower reactor pump P-103A/B
To alkaline hydrolysis device；The alkaline hydrolysis device uses neutralization reaction kettle R-101A/B；
Wherein, dimethylamine refining plant includes dimethylamine rectifying column T-102, dimethylamine rectifying column condenser E-103A/B, diformazan
Amine rectifier column reflux tank V-102 and dimethylamine rectifying column reboiler E-104, dimethylamine rectifying column T-102 top passes through diformazan
Installed on the downside of amine rectifying column condenser E-103A/B connection dimethylamine rectifier column reflux tank V-102, dimethylamine rectifying column T-102
Dimethylamine rectifying column reboiler E-104, dimethylamine rectifier column reflux tank V-102 bottom connection dimethylamine rectifier column reflux pump P-
104A/B, dimethylamine rectifying column T-102 bottom are connected with dimethylamine tower bottom of rectifying tower pump P-102A/B.
The reason for present invention have found high ammonia-nitrogen content, and innovate propose alkaline hydrolysis plus rectifying from the high kelvin of Sucralose
The method that dimethylamine is extracted in nitrogen waste water, the reason for high kjeldahl nitrogen is the presence of dimethylformamide i.e. DMF in waste water, its chemistry
Property is stable, 150 DEG C of boils up till, and the method for conventional processing ammonia nitrogen waste water is invalid to its.Its alkaline hydrolysis is by this method first
Dimethylamine, the low boiling point of dimethylamine, 7 DEG C.It is very easy to be separated with negative pressure rectificating method.The enrichment extraction of rectifying column tower top dimethylamine
Dimethylamine finished product, turns waste into wealth.Bottom of towe ammonia nitrogen class material is reduced, ammonia-nitrogen content reduction so that waste water is easily processed.
It is described above, only it is the part preferred embodiment of the present invention, any those skilled in the art may profit
Equivalent technical scheme is changed or is revised as with the technical scheme of above-mentioned elaboration.Therefore, the technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (9)
1. the method for dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose, it is characterized in that comprising the following steps：
First, take off light：Waste water is through flux modification, into lightness-removing column progress lock out operation after preheating, overhead extraction ethyl acetate solution,
Ethyl acetate is gone to recycle, bottom of towe extraction dimethylformamide and water go alkaline hydrolysis kettle to handle；
2nd, alkaline hydrolysis：The Produced Liquid of lightness-removing column bottom of towe enters alkaline hydrolysis kettle by preheating, adds liquid caustic soda and adjusts pH in 9-14, heating is stirred
Mix until dimethylformamide all decomposition, are refined subsequently into dimethylamine rectifying column；
3rd, dimethylamine is refined：Dimethylamine is separated with rectifying means, dimethylamine is enriched with tower top, the ammonia nitrogen in waste water of bottom of towe
Content is greatly lowered with COD contents.
2. the method for dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 1 from Sucralose, it is characterized in that：Institute
State de- light comprise the concrete steps that：
Waste water enters lightness-removing column after flux modification, after preheating and carries out lock out operation, and waste water enters de- from lightness-removing column T-101 tower tops
Light tower, the ethyl ester in material by the steam after lightness-removing column reboiler E-102 circulating and evaporatings, constantly carried secretly and discharged, steam warp
After condenser of light component removal column E-101 condensations, collect into ethyl acetate tank V-101, be delivered to through lightness-removing column extraction pump P-105A/B
Keep in tank field；Lightness-removing column tower bottoms is mainly water and dimethylformamide, and neutralization is delivered to through lightness-removing column tower reactor pump P-103A/B
Reactor R-101A/B carries out dimethylformamide decomposition reaction.
3. the method for dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 2 from Sucralose, it is characterized in that：Institute
The lightness-removing column T-101 stated is stripper.
4. the method for dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 1 from Sucralose, it is characterized in that：Institute
State comprising the concrete steps that for alkaline hydrolysis：
Lightness-removing column tower bottoms is delivered to neutralization reaction kettle R-101A/B through pump P-103, and liquid caustic soda is delivered to R- through out-of-bounds delivery pump
101A/B, regulation reactor material pH value is 9；Heating stirring is until dimethylformamide all decomposition, neutralization reaction kettle R-
101A/B materials are delivered to dimethylamine rectifying column T-102 through dimethylamine rectifying column feed pump P-101A/B and carry out lock out operation.
5. the method for dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 1 from Sucralose, it is characterized in that：Institute
State that dimethylamine is refined to be comprised the concrete steps that：
Dimethylamine rectifying column T-102 is operated using normal pressure continuous rectification, and dimethylamine rectifying column T-102 overhead vapours is through dimethylamine essence
Collected after evaporating tower condenser E-103A/B condensations to dimethylamine rectifier column reflux tank V-102；Dimethylamine rectifier column reflux tank V-102
In material conveyed through dimethylamine rectifier column reflux pump P-104A/B, be partly refluxed to dimethylamine rectifying column T-102, part is produced
It is temporary to tank field；Dimethylamine rectifying column T-102 overhead extractions material is 40% dimethylamine solution, dimethylamine rectifying column T-102 tower reactors
Circulating and evaporating is carried out using dimethylamine rectifying column reboiler E-104；Tower bottoms is defeated through dimethylamine tower bottom of rectifying tower pump P-102A/B
Send, deliver to treatment tank.
6. the method for dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 5 from Sucralose, it is characterized in that：Institute
State dimethylamine rectifying column T-102 operating conditions：93 ± 1 DEG C of tower top temperature, 100 ± 2 DEG C of tower reactor, operating pressure is normal pressure；Diformazan
Amine rectifying column reboiler E-104 is vertical thermosiphon reboiler, and heat transferring medium is 4kgf/cm2 saturated vapor.
7. the device of dimethylamine is extracted in a kind of high kjeldahl nitrogen waste water from Sucralose, it is characterized in that：Including it is de- it is with light packs put, alkaline hydrolysis
Device and dimethylamine refining plant, wherein, it is described de- with light packs to put including lightness-removing column T-101, lightness-removing column reboiler E-102, de- light
Tower condenser E-101, ethyl acetate tank V-101, lightness-removing column tower reactor pump P-103 and lightness-removing column extraction pump P-105A/B, it is described de-
Light tower T-101 top is connected to ethyl acetate tank V-101 by condenser of light component removal column E-101, and ethyl ester is produced by lightness-removing column
Pump P-105A/B is output to tank field；The bottom side of the lightness-removing column T-101 is provided with lightness-removing column reboiler E-102, lightness-removing column T-
101 bottom is provided with lightness-removing column tower reactor pump P-103, and dimethylformamide is delivered to alkaline hydrolysis through lightness-removing column tower reactor pump P-103A/B and filled
Put；The alkaline hydrolysis device uses neutralization reaction kettle R-101A/B；
The dimethylamine refining plant includes dimethylamine rectifying column T-102, dimethylamine rectifying column condenser E-103A/B, dimethylamine
Rectifier column reflux tank V-102 and dimethylamine rectifying column reboiler E-104, dimethylamine rectifying column T-102 top passes through dimethylamine
Two are installed on the downside of rectifying column condenser E-103A/B connection dimethylamine rectifier column reflux tank V-102, dimethylamine rectifying column T-102
Methylamine rectifying column reboiler E-104.
8. the device of dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 7 from Sucralose, it is characterized in that：Institute
State dimethylamine rectifier column reflux tank V-102 bottom connection dimethylamine rectifier column reflux pump P-104A/B.
9. the device of dimethylamine is extracted in the high kjeldahl nitrogen waste water according to claim 7 from Sucralose, it is characterized in that：Institute
The bottom for stating dimethylamine rectifying column T-102 is connected with dimethylamine tower bottom of rectifying tower pump P-102A/B.
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| CN104910020A (en) * | 2015-05-20 | 2015-09-16 | 盐城捷康三氯蔗糖制造有限公司 | Method for recovering dimethylamine from sucralose production wastewater |
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