CN110723826A - Environment-friendly, efficient and nontoxic corrosion inhibitor and preparation method and application thereof - Google Patents
Environment-friendly, efficient and nontoxic corrosion inhibitor and preparation method and application thereof Download PDFInfo
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- CN110723826A CN110723826A CN201911004209.4A CN201911004209A CN110723826A CN 110723826 A CN110723826 A CN 110723826A CN 201911004209 A CN201911004209 A CN 201911004209A CN 110723826 A CN110723826 A CN 110723826A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
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- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to an environment-friendly, efficient and nontoxic corrosion inhibitor, a preparation method and application thereof, wherein the corrosion inhibitor takes lactate, polyepoxysuccinic acid, polyaspartic acid and 2-phosphate-1, 2, 4-butane tricarboxylate as main bodies, is compounded with sulfonated lignin, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate and molybdate, and is chelated into a film by the action of sodium benzoate, sodium gluconate, polyethylene glycol and polyvinyl alcohol, so that metal corrosion can be effectively prevented, and the corrosion inhibitor has the effects of scale inhibition and sterilization. The corrosion inhibitor has the excellent characteristics of no corrosiveness, safety, no toxicity, environmental protection and the like, can be used in a high-low temperature cold-carrying heat transfer circulating water system, can effectively prevent metal corrosion in the system, has the total phosphorus content of less than 0.05mg/L in circulating water, effectively reduces the phosphorus discharge amount, and protects the environment.
Description
Technical Field
The invention relates to the technical field of water treatment agents, in particular to an environment-friendly, efficient and nontoxic corrosion inhibitor and a preparation method and application thereof.
Background
The corrosion inhibitor is a substance which is used on the surface of metal and plays a role in protecting, and the addition of trace or small amount of chemical substances can obviously reduce the corrosion speed of the metal material in the medium to zero, and simultaneously can keep the original physical and mechanical properties of the metal material unchanged. The reasonable use of corrosion inhibitors is an effective way to prevent metals and their alloys from corroding in the environment medium. The corrosion inhibitor technology has become one of the most widely applied methods in the corrosion prevention technology due to good effect and higher economic benefit. In particular, corrosion inhibition technology has become one of the main anti-corrosion means in the production and processing, chemical cleaning, atmospheric environment, industrial water, machine and instrument manufacturing and petrochemical production processes of petroleum products.
Although the amount of the polyphosphate used as a corrosion inhibitor in an industrial circulating water system is only 0.1-1 percent, the polyphosphate used as industrial water has a large amount of phosphorus discharged into a water environment, and a large amount of phosphorus enters a water body, so that water body eutrophication is easily caused. Therefore, other more effective methods for preventing metal corrosion and removing scale are required in industry. The low-phosphorus corrosion inhibitor in the prior art has fewer varieties, larger dosage and poorer scale and corrosion inhibition performance, and has unsatisfactory performance in two aspects of corrosion speed and dirt deposition rate. The problem of environmental pollution caused by corrosion inhibitors has attracted attention, and the development of more environment-friendly, safe and nontoxic corrosion inhibitors is urgently needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an environment-friendly, efficient and nontoxic corrosion inhibitor, and a preparation method and application thereof. The total phosphorus content of the corrosion inhibitor in circulating water is less than 0.05mg/L, so that the phosphorus discharge amount is effectively reduced; the corrosion inhibitor has wide application temperature range and wide application range.
The technical scheme adopted by the invention is as follows:
an environment-friendly, efficient and nontoxic corrosion inhibitor comprises the following raw material components:
50-70 parts of lactate, 30-50 parts of polyaspartic acid, 30-50 parts of polyepoxysuccinic acid, 20-40 parts of 2-phosphoric acid-1, 2, 4-butane tricarboxylate, 10-30 parts of sulfonated lignin, 10-20 parts of sodium tungstate, 1-3 parts of quaternary ammonium salt, 8-12 parts of zinc salt, 5-10 parts of sodium erythorbate, 4-6 parts of molybdate, 5-10 parts of sodium benzoate, 5-7 parts of sodium gluconate, 8-10 parts of polyethylene glycol and 8-10 parts of polyvinyl alcohol.
The raw material components of the corrosion inhibitor are further optimized to include:
60 parts of lactate, 40 parts of polyaspartic acid, 40 parts of polyepoxysuccinic acid, 30 parts of 2-phosphoric acid group-1, 2, 4-butane tricarboxylate, 20 parts of sulfonated lignin, 15 parts of sodium tungstate, 2 parts of quaternary ammonium salt, 10 parts of zinc salt, 7.5 parts of sodium erythorbate, 5 parts of molybdate, 7.5 parts of sodium benzoate, 6 parts of sodium gluconate, 9 parts of polyethylene glycol and 9 parts of polyvinyl alcohol.
Further, the molybdate is potassium molybdate, and the zinc salt is zinc chloride.
A method for preparing the corrosion inhibitor, comprising the steps of:
(1) sequentially mixing, heating and uniformly stirring the polyaspartic acid, the 2-phosphate-1, 2, 4-tricarboxylic acid butane and the sulfonated lignin to obtain a mixed system a;
(2) mixing the lactate, polyepoxysuccinic acid, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate, molybdate and sodium gluconate, adding a proper amount of water, heating and uniformly stirring to obtain a mixed system b;
(3) and (2) uniformly mixing sodium benzoate, polyethylene glycol and polyvinyl alcohol to obtain a mixed system c, respectively adding the mixed system a and the mixed system b into the mixed system c, heating and stirring to obtain the corrosion inhibitor.
Further, in the step (1), the heating temperature is 48-52 ℃, the stirring speed is 100-120r/min, and the heating and stirring time is 20-30 min.
Further, in the step (2), the mass ratio of the lactate to the added water is 1 (5-10).
Further, in the step (2), the heating temperature is 40-46 ℃, the stirring speed is 140r/min, and the heating and stirring time is 30-50 min.
Further, in the step (3), the heating temperature is 42-44 ℃, the stirring speed is 1000-.
The invention relates to an application of an environment-friendly, efficient and nontoxic corrosion inhibitor in a high-low temperature cold-carrying heat transfer circulating water system.
Furthermore, the corrosion inhibitor can be directly added into a circulating water system for use, and the addition concentration is 20-40 mg/L.
The invention has the beneficial effects that:
the corrosion inhibitor disclosed by the invention takes lactate, polyepoxysuccinic acid, polyaspartic acid and 2-phosphate-1, 2, 4-butane tricarboxylate as main bodies, is compounded with sulfonated lignin, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate and molybdate, and then is chelated into a film under the action of sodium benzoate, sodium gluconate, polyethylene glycol and polyvinyl alcohol, so that metal corrosion can be effectively prevented, and the corrosion inhibitor has the effects of scale inhibition and sterilization. The corrosion inhibitor has the excellent characteristics of no corrosion, safety, no toxicity, environmental protection and the like, can be used in a high-low temperature cold-carrying heat transfer circulating water system, and can effectively prevent metal corrosion in the system, the addition concentration of the corrosion inhibitor in the circulating water system is 20-40mg/L, and the total phosphorus content in the circulating water is less than 0.05mg/L due to the small phosphorus content of the components, so that the phosphorus discharge amount is effectively reduced, and the characteristics of safety, no toxicity, environmental protection and the like are ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the following examples 1g is represented by 1 part by weight.
Example 1
The embodiment provides an environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following raw material components:
50 parts of lactate, 30 parts of polyaspartic acid, 30 parts of polyepoxysuccinic acid, 20 parts of 2-phosphoric acid group-1, 2, 4-butane tricarboxylate, 10 parts of sulfonated lignin, 10 parts of sodium tungstate, 1 part of quaternary ammonium salt, 8 parts of zinc chloride, 5 parts of sodium erythorbate, 4 parts of sodium molybdate, 5 parts of sodium benzoate, 5 parts of sodium gluconate, 8 parts of polyethylene glycol and 8 parts of polyvinyl alcohol.
Further, the embodiment provides a preparation method of the environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following steps:
(1) sequentially mixing the polyaspartic acid, the 2-phosphate-1, 2, 4-tricarboxylic acid butane and the sulfonated lignin, heating at 48 ℃ for 20min, and stirring at 100r/min for 20min to obtain a mixed system a;
(2) uniformly mixing the lactate, polyepoxysuccinic acid, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate, molybdate and sodium gluconate, adding 5 times of water by mass, heating at 40 ℃ for 30min, and stirring at 120r/min for 30min to obtain a mixed system b;
(3) and (2) uniformly mixing sodium benzoate, polyethylene glycol and polyvinyl alcohol to obtain a mixed system c, respectively adding the mixed system a and the mixed system b into the mixed system c, heating at 42 ℃ for 5.5h, and stirring at 1000r/min for 5.5h to obtain the corrosion inhibitor.
Example 2
The embodiment provides an environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following raw material components:
70 parts of lactate, 50 parts of polyaspartic acid, 50 parts of polyepoxysuccinic acid, 40 parts of 2-phosphoric acid group-1, 2, 4-butane tricarboxylate, 30 parts of sulfonated lignin, 20 parts of sodium tungstate, 3 parts of quaternary ammonium salt, 12 parts of zinc sulfate, 10 parts of sodium erythorbate, 6 parts of potassium molybdate, 10 parts of sodium benzoate, 7 parts of sodium gluconate, 10 parts of polyethylene glycol and 10 parts of polyvinyl alcohol.
Further, the embodiment provides a preparation method of the environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following steps:
(1) sequentially mixing the polyaspartic acid, the 2-phosphate-1, 2, 4-tricarboxylic acid butane and the sulfonated lignin, heating at 52 ℃ for 30min, and stirring at 120r/min for 30min to obtain a mixed system a;
(2) uniformly mixing the lactate, polyepoxysuccinic acid, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate, molybdate and sodium gluconate, adding 10 times of water by mass, heating at 46 ℃ for 50min, and stirring at 140r/min for 50min to obtain a mixed system b;
(3) and (2) uniformly mixing sodium benzoate, polyethylene glycol and polyvinyl alcohol to obtain a mixed system c, respectively adding the mixed system a and the mixed system b into the mixed system c, heating at 44 ℃ for 6.5 hours, and stirring at 2000r/min for 6.5 hours to obtain the corrosion inhibitor.
Example 3
The embodiment provides an environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following raw material components:
60 parts of lactate, 40 parts of polyaspartic acid, 40 parts of polyepoxysuccinic acid, 30 parts of 2-phosphoric acid group-1, 2, 4-butane tricarboxylate, 20 parts of sulfonated lignin, 15 parts of sodium tungstate, 2 parts of quaternary ammonium salt, 10 parts of zinc chloride, 7.5 parts of sodium erythorbate, 5 parts of sodium molybdate, 7.5 parts of sodium benzoate, 6 parts of sodium gluconate, 9 parts of polyethylene glycol and 9 parts of polyvinyl alcohol.
Further, the embodiment provides a preparation method of the environment-friendly, efficient and nontoxic corrosion inhibitor, which comprises the following steps:
(1) sequentially mixing the polyaspartic acid, the 2-phosphate-1, 2, 4-tricarboxylic acid butane and the sulfonated lignin, heating at 50 ℃ for 25min, and stirring at 110r/min for 25min to obtain a mixed system a;
(2) uniformly mixing the lactate, polyepoxysuccinic acid, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate, molybdate and sodium gluconate, adding 8 times of water by mass, heating at 43 ℃ for 40min, and stirring at 130r/min for 40min to obtain a mixed system b;
(3) and (2) uniformly mixing sodium benzoate, polyethylene glycol and polyvinyl alcohol to obtain a mixed system c, respectively adding the mixed system a and the mixed system b into the mixed system c, heating at 43 ℃ for 6h, and stirring at 1500r/min for 6h to obtain the corrosion inhibitor.
Comparative example 1
The difference between the comparative example and the example 3 is only the difference of the raw material components, the raw material of the comparative example does not contain lactate, polyepoxysuccinic acid, sulfonated lignin, sodium erythorbate and sodium gluconate, and the other operations are the same as the example 3.
Comparative example 2
The difference between the comparative example and the example 3 is only in the preparation method, the corrosion inhibitor is obtained by mixing the raw materials, adding the same amount of water, heating while stirring, wherein the heating temperature is 43 ℃, the stirring speed is 1500r/min, and the heating or stirring time is 6 hours.
Examples of the experiments
The corrosion inhibitors obtained in the example 3 and the comparative examples 1-2 are respectively added into a high-low temperature cold-carrying heat transfer circulating water system with the same volume, the concentration of each group of corrosion inhibitors is 30mg/L, the corrosion rate and the adhesion rate of each group of carbon steel hanging pieces are measured, the lower the corrosion rate of each group of carbon steel hanging pieces is, the better the corrosion inhibition performance of the corrosion inhibitors is, the lower the adhesion rate is, the better the scale inhibition effect of the corrosion inhibitors is, and the measurement results are shown in the table 1.
TABLE 1 determination of the effectiveness of the corrosion inhibitors of the respective groups
| Index (I) | Example 3 | Comparative example 1 | Comparative example 2 |
| Corrosion Rate (mm/a) | 0.008 | 0.117 | 0.143 |
| Adhesion Rate (mg/cm)2·m) | 5.96 | 10.63 | 9.14 |
As can be seen from Table 1, the corrosion inhibitor obtained in example 3 has a significantly better effect than the comparative example, which shows that only when the components are mixed in a specific content and subjected to a specific preparation method, the prepared corrosion inhibitor can ensure that the corrosion inhibitor has a good environmental benefit of low phosphorus and also has a good corrosion inhibition performance, and the corrosion rate and the adhesion rate of the carbon steel coupon are reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An environment-friendly, efficient and nontoxic corrosion inhibitor is characterized by comprising the following raw material components:
50-70 parts of lactate, 30-50 parts of polyaspartic acid, 30-50 parts of polyepoxysuccinic acid, 20-40 parts of 2-phosphoric acid-1, 2, 4-butane tricarboxylate, 10-30 parts of sulfonated lignin, 10-20 parts of sodium tungstate, 1-3 parts of quaternary ammonium salt, 8-12 parts of zinc salt, 5-10 parts of sodium erythorbate, 4-6 parts of molybdate, 5-10 parts of sodium benzoate, 5-7 parts of sodium gluconate, 8-10 parts of polyethylene glycol and 8-10 parts of polyvinyl alcohol.
2. The corrosion inhibitor of claim 1, wherein the raw material components comprise:
60 parts of lactate, 40 parts of polyaspartic acid, 40 parts of polyepoxysuccinic acid, 30 parts of 2-phosphoric acid group-1, 2, 4-butane tricarboxylate, 20 parts of sulfonated lignin, 15 parts of sodium tungstate, 2 parts of quaternary ammonium salt, 10 parts of zinc salt, 7.5 parts of sodium erythorbate, 5 parts of molybdate, 7.5 parts of sodium benzoate, 6 parts of sodium gluconate, 9 parts of polyethylene glycol and 9 parts of polyvinyl alcohol.
3. The corrosion inhibitor according to claim 1 or 2, characterized in that the molybdate is potassium molybdate or sodium molybdate and the zinc salt is zinc chloride or zinc sulphate.
4. A method for preparing a corrosion inhibitor according to any one of claims 1 to 3, comprising the steps of:
(1) sequentially mixing, heating and uniformly stirring the polyaspartic acid, the 2-phosphate-1, 2, 4-tricarboxylic acid butane and the sulfonated lignin to obtain a mixed system a;
(2) mixing the lactate, polyepoxysuccinic acid, sodium tungstate, quaternary ammonium salt, zinc salt, sodium erythorbate, molybdate and sodium gluconate, adding a proper amount of water, heating and uniformly stirring to obtain a mixed system b;
(3) and (2) uniformly mixing sodium benzoate, polyethylene glycol and polyvinyl alcohol to obtain a mixed system c, respectively adding the mixed system a and the mixed system b into the mixed system c, heating and stirring to obtain the corrosion inhibitor.
5. The method for preparing the corrosion inhibitor according to claim 4, wherein in the step (1), the heating temperature is 48-52 ℃, and the stirring speed is 100-120 r/min.
6. The method for preparing the corrosion inhibitor according to claim 4, wherein in the step (1), the heating and stirring time is 20-30 min.
7. The preparation method of the corrosion inhibitor according to claim 4, wherein in the step (2), the mass ratio of the lactate to the added water is 1 (5-10).
8. The preparation method of the corrosion inhibitor as claimed in claim 4, wherein in the step (2), the heating temperature is 40-46 ℃, the stirring speed is 120-140r/min, and the heating and stirring time is 30-50 min.
9. The preparation method of the corrosion inhibitor according to claim 4, wherein in the step (3), the heating temperature is 42-44 ℃, the stirring speed is 1000-2000r/min, and the heating time and the stirring time are both 5.5-6.5 h.
10. Use of the corrosion inhibitor according to claims 1-9 in high and low temperature cold-carrying heat transfer circulating water systems.
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| CN112390385A (en) * | 2020-10-29 | 2021-02-23 | 攀枝花钢城集团瑞天安全环保有限公司 | Corrosion inhibitor and preparation method and application thereof |
| CN113981451A (en) * | 2021-08-13 | 2022-01-28 | 北京市古代建筑研究所 | Pre-filming corrosion inhibitor for iron cultural relics, and pre-filming and evaluation method thereof |
| CN114426340A (en) * | 2020-09-25 | 2022-05-03 | 中国石油化工股份有限公司 | Low-temperature scale and corrosion inhibitor and scale and corrosion inhibition method for circulating cooling water |
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| CN114426340A (en) * | 2020-09-25 | 2022-05-03 | 中国石油化工股份有限公司 | Low-temperature scale and corrosion inhibitor and scale and corrosion inhibition method for circulating cooling water |
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| CN112390385A (en) * | 2020-10-29 | 2021-02-23 | 攀枝花钢城集团瑞天安全环保有限公司 | Corrosion inhibitor and preparation method and application thereof |
| CN113981451A (en) * | 2021-08-13 | 2022-01-28 | 北京市古代建筑研究所 | Pre-filming corrosion inhibitor for iron cultural relics, and pre-filming and evaluation method thereof |
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