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Preparation method of modified polyaspartic acid copolymer

A polyaspartic acid and copolymer technology, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc. Simple and easy to operate, good anti-scaling performance, low price effect

Inactive Publication Date: 2015-04-22
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the introduction of only one functional group cannot take into account both scale inhibition and dispersibility, and the introduction of sulfonic acid groups and carboxylic acid groups at the same time not only makes it have good scale and corrosion inhibition functions, but also has good dispersibility

Method used

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  • Preparation method of modified polyaspartic acid copolymer
  • Preparation method of modified polyaspartic acid copolymer

Examples

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Embodiment 1

[0030] Synthesis of polysuccinimide (PSI): in a four-necked flask equipped with a condenser tube, a thermometer, a constant pressure dropping funnel and an electric stirrer, put 9.8 g of maleic anhydride, a small amount of 5.7 g of urea in water, and stir to react After 1 hour, the maleic anhydride was completely dissolved, then 2.51 g of taurine was added, and stirred and reacted in a water bath at 85° C. for 2 hours. Add 40ml of sulfolane and 5.7g of phosphoric acid, raise the temperature to 180°C±5°C, and react for 2h in an environment of continuous nitrogen flow. Cool to room temperature after the reaction, add absolute ethanol for precipitation. Then perform suction filtration, wash with absolute ethanol and deionized water successively, and put the suction filtration into a constant temperature drying oven at 60° C. for drying. (The calculated intermediate yield was 96%). Synthesis of polyaspartic acid copolymer: react glutamic acid with sodium hydroxide solution to ge...

example 2

[0032] In the four-necked flask that condensing tube, thermometer, constant pressure dropping funnel and electric stirrer are housed, put into maleic anhydride 9.8g, 5.7g urea a small amount of water, stir reaction 1 hour, make maleic anhydride dissolve completely, then 10.01 g of taurine was put in, and stirred and reacted in a water bath at 85° C. for 2 hours. Add 40ml of sulfolane and 5.4g of phosphoric acid, raise the temperature to 180°C±5°C, and react for 2.5h in an environment of continuous nitrogen flow. Cool to room temperature after the reaction, add absolute ethanol for precipitation. Then perform suction filtration, wash with absolute ethanol and deionized water successively, and put the suction filtration into a constant temperature drying oven at 60° C. for drying. React glutamic acid with sodium hydroxide solution to generate the corresponding sodium salt solution for later use. Weigh a certain amount of product in a Erlenmeyer flask, add a small amount of wat...

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Abstract

The invention discloses a preparation method of a modified polyaspartic acid copolymer. The preparation method is characterized in that maleic anhydride and urea are used as raw materials, a sulfonic acid group and a carboxy group are introduced to a side chain of polyaspartic acid by adopting polymerization and co-polymerization methods, and the defects that the polyaspartic acid is single in functional group, single in structure, poor in effect for resisting the scale of calcium phosphate, poor in scale-resistant effect and poor in dispersion capacity can be overcome. The product has a good scale-resistant effect for the calcium phosphate scale and calcium sulfate scale; moreover, the dispersion capacity also can be improved, and the zinc stabilizing effect is good. In addition, the product is non-toxic, pollution-free, easy to biologically degrade and capable of meeting the environmental protection requirement; moreover, the preparation process is environment-friendly and efficient, the raw material cost is low, and the economical benefit can be realized. The industrialized production can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and specifically relates to a preparation method of a modified polyaspartic acid copolymer. Specifically, polyaspartic acid is modified to add carboxylic acid groups and sulfonic acid group, so that it has better anti-scaling performance. Background technique [0002] Polyaspartic acid (PASP) is a kind of green scale inhibitor successfully developed inspired by the metabolic process of marine animals. It is non-toxic, non-polluting, biodegradable, and has the ability to chelate and disperse. Treatment agent has been sought after at home and abroad in recent years and has become a hot research topic. Polyaspartic acid not only for CaCO 3 and CaSO 4 Scale has good scale inhibition effect, and can also chelate metal ions in industrial wastewater, especially suitable for inhibiting cooling water, boiler water, etc. It can prevent scale from clogging pipes an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C02F5/12
Inventor 杨建军吴庆云张建安吴明元何滢霞项锋李森宋田雨
Owner ANHUI UNIVERSITY
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