Preparation and application methods of polyepoxysuccinic acid derivative scale inhibitor

A technology of polyepoxysuccinic acid and sodium epoxysuccinate, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., and can solve environmental hazards, low efficiency of scale inhibition, use Problems such as high cost, to achieve the effect of not destroying the ecological environment, improving the linear structure, and broadening the scope of application

Inactive Publication Date: 2013-03-27
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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  • Preparation and application methods of polyepoxysuccinic acid derivative scale inhibitor
  • Preparation and application methods of polyepoxysuccinic acid derivative scale inhibitor
  • Preparation and application methods of polyepoxysuccinic acid derivative scale inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A. Cyclization reaction and purification of cyclization products

[0024] aAdd 16g of NaOH and 36ml of water into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, then add 19.6g of maleic anhydride, while the temperature of the water bath is raised to 55°C. After the water bath was heated to 55°C, the catalyst 1.2gNa was added 2 WO 4 . Finally, raise the temperature of the water bath to 70°C. After the temperature stabilizes, use a separatory funnel to evenly add 24ml of hydrogen peroxide dropwise within 35 minutes. At this point, 1:1 hydrochloric acid solution was used to adjust the pH to 6-7, 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 vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is 1...

Embodiment 2

[0031] A. Cyclization reaction and purification of cyclization products

[0032] a Add 13g of NaOH and 35ml of water into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, add 18g of maleic anhydride, and raise the temperature of the water bath to 52°C. After the temperature of the water bath was raised to 52°C, the catalyst 1gNa was added 2 WO 4 . Finally, raise the temperature of the water bath to 65°C. After the temperature is stable, use a separatory funnel to evenly add 20ml of hydrogen peroxide dropwise within 30 minutes. At this time, start to adjust the pH=6-7 with 1:1 hydrochloric acid solution, and get mixed crude product after reacting for 1 hour.

[0033] b product purification: the mixed crude product of step a is heated with an electric heating mantle, and vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is 1 / 2 of the vol...

Embodiment 3

[0039] A. Cyclization reaction and purification of cyclization products

[0040] a Add 18g of NaOH and 38ml into the three-necked flask, put the three-necked flask into a magnetic stirring water bath, fully dissolve under magnetic stirring, add 20g of maleic anhydride, and raise the temperature of the water bath to 58°C. After the temperature of the water bath was raised to 58°C, the catalyst 1.5gNa was added 2 WO 4 Finally, raise the temperature of the water bath to 75°C, and after the temperature stabilizes, use a separatory funnel to evenly add 26ml of hydrogen peroxide dropwise within 40 minutes. At this point, a 1:1 hydrochloric acid solution was used to adjust the pH to 7, 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 vacuumized simultaneously for distillation under reduced pressure. When the remaining liquid after evaporation is 1 / 2 of...

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Abstract

The invention provides a polyepoxysuccinic acid derivative scale inhibitor. A preparation method of the polyepoxysuccinic acid derivative scale inhibitor comprises the step of cyclization reaction and purifying of a cyclized product, preparation of a polyepoxysuccinic acid product, and the step of preparation of polyepoxysuccinic acid derivative Lcys-PESA (Polyepoxysuccinic Acid). The preparation method comprises the following concrete steps in sequence: placing the product of PESA into a three-necked flask; adding L-cysteine; transferring the three-necked flask in a methylsilicone oil bath to heat until reaching 110 to 120 DEG C; starting to adjust the pH; fully stirring to react; drying through a drying device, so as to obtain an L-cysteine modified polyepoxysuccinic acid derivative; porphyrizing; and storing in a seal way to stand by service. The polyepoxysuccinic acid derivative scale inhibitor is applied to the conditions with temperature of 55 to 85 DEGC, pH of 5.0 to 10.0, and scale inhibiting ratio of 90 to 98%. According to the preparation and application methods of the polyepoxysuccinic acid derivative scale inhibitor, small molecular substances, which are free from phosphorus and nontoxic, brings no damage to the ecological environment and are higher in biodegradability and water solubility, are added during synthesizing; and the polyepoxysuccinic acid derivative scale inhibitor excellent in scale inhibiting and dispersing performance is specially suitable for being applied to treatment of industrial water.

Description

technical field [0001] The invention relates to the field of preparation and application of a polyepoxysuccinic acid derivative scale inhibitor. In particular, it relates to the preparation and application method of a polyepoxysuccinic acid derivative scale inhibitor used in water treatment agents with environment-friendly biodegradability and water solubility. 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 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 techniques 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 Applications(China)
IPC IPC(8): C08G65/22C08G65/334C02F5/10
Inventor 柳鑫华孙彩云佟欣佳王庆辉杜娇韩婕
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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