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Preparation method of epoxysuccinate /acrylic acid/2-acrylamido-2-methyl propane sulfonic acid copolymer

A technology based on epoxy succinic acid and acrylamide, which is applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc. It can solve the problem of poor zinc stabilization ability and unsatisfactory calcium phosphate scale inhibition rate and other problems, to achieve the effect of excellent scale inhibition performance and broad application prospects

Inactive Publication Date: 2012-11-07
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In terms of scale inhibition performance, polyepoxysuccinic acid has good scale inhibition to calcium carbonate, but the scale inhibition rate to calcium phosphate is not ideal, and its ability to stabilize zinc is also poor.

Method used

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  • Preparation method of epoxysuccinate /acrylic acid/2-acrylamido-2-methyl propane sulfonic acid copolymer
  • Preparation method of epoxysuccinate /acrylic acid/2-acrylamido-2-methyl propane sulfonic acid copolymer
  • Preparation method of epoxysuccinate /acrylic acid/2-acrylamido-2-methyl propane sulfonic acid copolymer

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: preparation epoxy succinic acid

[0022] (1) Weigh 0.2mol of maleic anhydride, put it into a four-neck flask equipped with a condenser, thermometer, stirrer and dropping funnel, add 40mL of deionized water to dissolve the maleic anhydride;

[0023] (2) When the maleic anhydride is completely dissolved, add 10 mL of 50% sodium hydroxide solution through the dropping funnel to the maleic anhydride aqueous solution under cooling and stirring at a constant speed for 40 minutes;

[0024] (3) After dropping the sodium hydroxide solution, raise the system temperature to 50-70°C, add a sodium tungstate catalyst with a mass of 1.5% maleic anhydride, and drop 40mL of a hydrogen peroxide solution with a mass concentration of 30% within 20 minutes at a constant speed At the same time, use 50% sodium hydroxide to adjust the pH value of the reaction system between 12~14. After the pH is stable, raise the temperature of the reaction system to 50~70°C, react at this tempe...

Embodiment 2

[0025] Embodiment 2: the preparation of epoxy succinic acid / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer

[0026] (1) In a four-necked flask equipped with a dropping funnel, a condenser, a thermometer and a stirrer, add epoxysuccinic acid and dissolve it with deionized water to a mass concentration of 20%;

[0027] (2) Heat the temperature of the reaction system to 80-90°C, use two dropping funnels to drop the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid aqueous solution and 10% mass concentration of Catalyst aqueous solution, the mass concentration of acrylic acid in the mixed solution is 20%, and the mass concentration of 2-acrylamido-2-methylpropanesulfonic acid is 25%, dripping simultaneously within 2h, described epoxy succinic acid, acrylic acid and The mass ratio of 2-acrylamido-2-methylpropanesulfonic acid is 1:0.5:0.5, the catalyst is ammonium persulfate, and the dosage is 4% of the total amount of monomers;

[0028] (3) After...

Embodiment 3

[0029] Embodiment 3: the preparation of epoxy succinic acid / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer

[0030] (1) In a four-necked flask equipped with a dropping funnel, condenser, thermometer and stirrer, add epoxysuccinic acid and dissolve it with deionized water to a mass concentration of 30%;

[0031] (2) Heat the temperature of the reaction system to 80-90°C, use two dropping funnels to drop the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid aqueous solution and 10% mass concentration of Catalyst aqueous solution, the mass concentration of acrylic acid in the mixed solution is 25%, and the mass concentration of 2-acrylamido-2-methylpropanesulfonic acid is 15%, dripping simultaneously within 2h, described epoxy succinic acid, acrylic acid and The mass ratio of 2-acrylamido-2-methylpropanesulfonic acid is 1:1:0.6, the catalyst is ammonium persulfate, and the dosage is 7% of the total amount of monomers;

[0032] (3) After all the...

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Abstract

The invention discloses a preparation method of a novel scale inhibitor epoxysuccinate / acrylic acid / 2-acrylamido-2-methyl propane sulfonic acid copolymer which is prepared by the polymerization of epoxysuccinate, acrylic acid and 2-acrylamido-2-methyl propane sulfonic acid under appropriate condition. Compared with the polyepoxysuccinic acid, the ESA / AA / AMPS terpolymer prepared by the method provided by the invention can improve the scale inhibition performance greatly and the scale inhibition effect of calcium carbonate is roughly equal to polyepoxysuccinic acid, while the ability of blocking calcium phosphate scale, calcium sulfate scale and stabilizing zinc are significantly better than that of the polyepoxysuccinic acid. The epoxysuccinate / acrylic acid / 2-acrylamido-2-methyl propane sulfonic acid terpolymer is a new water-treatment chemical which has the advantages of excellent comprehensive scale inhibition performance, is free of phosphate, is applicable to a circulating water system with high alkali, high hardness and high concentration rate, and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a preparation method of a novel scale inhibitor epoxy succinic acid / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer. Background technique [0002] The development of scale inhibitors has mainly gone through the process from natural polymer scale inhibitors to phosphorus scale inhibitors (including organic phosphine and inorganic phosphorus), and now to organic polymers and environment-friendly scale inhibitors. At present, the research on scale inhibitors is deepening with the rapid development of science and technology, and the synthesis technology is becoming mature; while the functions and characteristics of scale inhibitors are becoming more and more perfect, the types of agents are also increasing; in the industry Driven by water treatment needs and environmental protection requirements, the requirements for scale inhibitors ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/58C08F222/06C07D303/48C07D301/12C02F5/12
Inventor 冯素敏秦宗仁张改然师艳雪尹丽胖
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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