A kind of preparation and application method of polyepoxysuccinic acid derivative scale inhibitor

A technology of polyepoxysuccinic acid and sodium epoxysuccinate, which can be used in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., and can solve the problems of low efficiency of scale inhibition, harmful environment, use High cost and other issues, to achieve the effect of not destroying the ecological environment, improving the linear structure, and broadening the scope of application

Inactive Publication Date: 2014-10-08
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high use cost, low scale inhibition efficiency and harmfulness to the environment of the existing scale inhibitors, the present invention provides a kind of small molecular substance added in the synthesis to increase the scale inhibition performance of polyepoxysuccinic acid , has good solubility in water, is non-toxic and harmless to the environment, is biodegradable, has multi-functionality, and is a polyepoxysuccinic acid derivative scale inhibitor with high scale inhibition efficiency. The second is to provide a polyepoxysuccinic acid derivative scale inhibitor Application method of acid derivative antiscalant

Method used

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  • A kind of preparation and application method of polyepoxysuccinic acid derivative scale inhibitor
  • A kind of preparation and application method of polyepoxysuccinic acid derivative scale inhibitor
  • A kind of preparation and application method of polyepoxysuccinic acid derivative scale inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A. Cyclization reaction and cyclization product purification

[0024] a Add 16g NaOH to the three-necked flask, and add 36ml of water, put the three-necked flask into a magnetic stirring water bath, after fully dissolving under magnetic stirring, add 19.6g maleic anhydride, while the water bath is heated to 55°C. After the water bath was heated to 55°C, 1.2g Na catalyst was added 2 WO 4 . Then, heat the water bath to 70°C, and after the temperature is stable, use a separatory funnel to evenly add 24ml of hydrogen peroxide dropwise within 35min. At this point, the pH=6-7 was adjusted with 1:1 hydrochloric acid solution, and the mixed crude product was obtained after 1.5 hours of reaction.

[0025] b Product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuum distillation is carried out at the same time. When the residual liquid after evaporation is 1 / 2 of the original solution volume, the vacuum distillation is stoppe...

Embodiment 2

[0031] A. Cyclization reaction and cyclization product purification

[0032] a Add 13g NaOH to the three-necked flask, and add 35ml of water, put the three-necked flask into a magnetic stirring water bath, after fully dissolving under magnetic stirring, add 18g maleic anhydride, while the water bath is heated to 52 ° C. After the water bath was heated to 52 °C, 1 g of Na catalyst was added. 2 WO 4 . Then, heat the water bath to 65°C, and after the temperature is stable, add 20ml of hydrogen peroxide evenly dropwise with a separatory funnel within 30min. At this point, start to adjust pH=6-7 with 1:1 hydrochloric acid solution, and obtain mixed crude product after 1 hour of reaction.

[0033] b Product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuum distillation is carried out at the same time. When the residual liquid after evaporation is 1 / 2 of the original solution volume, the vacuum distillation is stopped. The solu...

Embodiment 3

[0039]A. Cyclization reaction and cyclization product purification

[0040] a Add 18g NaOH and 38ml to the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, add 20g maleic anhydride, and heat the water bath to 58°C. After the water bath was heated to 58°C, 1.5g Na catalyst was added 2 WO 4 Then, heat the water bath to 75°C, and after the temperature is stable, add 26ml of hydrogen peroxide evenly dropwise with a separatory funnel within 40min. At this time, the pH=7 was adjusted with 1:1 hydrochloric acid solution, and the mixed crude product was obtained after 2 hours of reaction.

[0041] b Product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuum distillation is carried out at the same time. When the residual liquid after evaporation is 1 / 2 of the original solution volume, the vacuum distillation is stopped. The solution was poured into the prepa...

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Abstract

A polyepoxysuccinic acid derivative scale inhibitor, said method comprising: cyclization reaction and purification of cyclization products; preparation of polyepoxysuccinic acid products; also includes preparation of polyepoxysuccinic acid derivative Lcys-PESA , the preparation method is: put the product of polyepoxysuccinic acid PESA into a three-necked flask, add L-cysteine, put it into a methyl silicone oil bath and heat it, and when the temperature rises to 110°C-120°C, start Adjust the pH value, fully stir the reaction, and dry with a drying device to obtain L-cysteine-modified polyepoxysuccinic acid derivatives, which are finely ground and sealed for future use. The polyepoxysuccinic acid derivative scale inhibitor is applied at a temperature of 55°C-85°C, a pH value of 5.0-10.0, and a scale inhibition rate of 90%-98%. A small molecular substance is added in the synthesis, which does not contain phosphorus, is non-toxic, does not damage the ecological environment, and has good biodegradability and water solubility. Its excellent scale inhibition and dispersion properties are especially suitable for industrial water treatment.

Description

technical field [0001] The invention relates to the preparation and application fields of a polyepoxysuccinic acid derivative scale inhibitor. In particular, it relates to the preparation and application method of a polyepoxysuccinic acid derivative scale inhibitor with environmentally friendly biodegradability and water-solubility for water treatment agents. Background technique [0002] With the gradual deepening of the concept of low carbon, environmental protection and sustainable development, the development direction of global chemical research has also undergone major changes, which is marked by the concept of "green chemistry (chemical industry)". And it is getting more and more attention. Green chemistry is to use chemical technologies and methods to fundamentally reduce or eliminate the production and application of raw materials, products, by-products, solvents and reagents that are harmful to human health or the environment. With the development of society, gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/22C08G65/334C02F5/10
Inventor 柳鑫华陈皓君孙彩云佟欣佳王庆辉杜娇韩婕吴卫华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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