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Polyaspartic acid derivate, as well as preparation method and application thereof

A technology of polyaspartic acid and aspartic acid is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. Achieve good corrosion inhibition performance and biodegradation performance, improve comprehensive performance, and improve economic efficiency

Inactive Publication Date: 2013-01-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that only one functional group is introduced in the prior art, and the scale inhibition and dispersibility cannot be taken into account, the present invention provides a polyaspartic acid derivative and its preparation method and application, containing sulfonic acid group and carboxylic acid base, biodegradable, scale and corrosion inhibition and good dispersion

Method used

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  • Polyaspartic acid derivate, as well as preparation method and application thereof
  • Polyaspartic acid derivate, as well as preparation method and application thereof
  • Polyaspartic acid derivate, as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Synthesize polysuccinimide solid with reference to the experimental method in "Study on the relationship between polysuccinimide hydrolysis conditions and polyaspartic acid scale inhibition performance"; dissolve 12.5 grams of 2-aminoethanesulfonic acid in water and then stir continuously Add 20 grams of 25%wt sodium hydroxide dropwise; add 9.7 grams of polysuccinimide to a four-necked flask equipped with stirring and a thermometer, then add 30ml of distilled water to suspend it in water, slowly add 2 - Sodium taurine sulfonate solution, adjust the pH of the reaction solution to 8 with 25%wt sodium hydroxide solution every half hour, and react at a temperature of 30°C for 24 hours to obtain a reddish-brown sulfonic acid-based polyaspartic acid derivative transparent The solution was precipitated with 300ml of absolute ethanol to precipitate a yellow-brown solid product, filtered, washed 3 times with acetone, dried in a vacuum oven at 70°C for 5 hours, and finely ground t...

Embodiment 2

[0043] Synthesize polysuccinimide solid with reference to the experimental method in "Research on Hydrolysis Conditions of Polysuccinimide and Polyaspartic Acid Scale Inhibition Performance"; dissolve 10 grams of 2-aminoethanesulfonic acid in water and then under constant stirring 16 grams of 25% sodium hydroxide are added dropwise, and 2.94 grams of glutamic acid are dissolved in 4 grams of 25% sodium hydroxide solution in the same way; 9.7 grams of polysuccinimide are added in a four-necked flask equipped with stirring and thermometer, Then add 30ml of distilled water to suspend it in water, slowly add sodium glutamate and sodium 2-aminoethanesulfonate solution dropwise under stirring, adjust the pH of the reaction solution to 8 with 25% sodium hydroxide solution every half hour, and react Temperature 10°C, reaction for 26 hours, reddish brown carboxylic acid group and sulfonic acid group polyaspartic acid derivative transparent solution was obtained, precipitated with 300ml ...

Embodiment 3

[0053] Synthesize polysuccinimide solid with reference to the experimental method in "Research on the Hydrolysis Conditions of Polysuccinimide and the Scale Inhibition Performance of Polyaspartic Acid"; dissolve 7.5 grams of 2-aminoethanesulfonic acid in water and then under constant stirring 12 grams of 25% sodium hydroxide are added dropwise, and 5.88 grams of glutamic acid are dissolved in 8 grams of 25% sodium hydroxide solution in the same way; 9.7 grams of polysuccinimide are added in a four-necked flask equipped with stirring and a thermometer, Then add 30ml of distilled water to suspend it in water, slowly add sodium glutamate and sodium 2-aminoethanesulfonate solution dropwise under stirring, adjust the pH of the reaction solution to 9 with 25% sodium hydroxide solution every half hour, and react The temperature was 20°C, and the reaction was carried out for 24 hours to obtain a reddish-brown transparent solution of polyaspartic acid derivatives with carboxylic acid gr...

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Abstract

The invention relates to a polyaspartic acid derivate, as well as a preparation method and an application of the polyaspartic acid derivate. The polyaspartic acid derivate contains carboxylic acid groups and sulfo groups. The preparation method comprises the steps as follows: taking aspartic acid as a raw material; adopting a thermal solid phase polycondensation method to obtain polysuccinimide; dissolving polysuccinimide with water; synchronously dropping 2-taurine salt and glutamate aqueous solution; adjusting the pH (Potential of Hydrogen) of the solution to 8 to 10; reacting for 18 to 26 hours at 10 to 30 DEG C, so as to obtain reddish brown transparent solution; separating the solid with absolute ethyl alcohol; releasing the pressure and leaching; washing with acetone to obtain the yellowish-brown solid product; and drying in vacuum to obtain the polyaspartic acid derivate containing the carboxylic acid groups and the sulfo groups. According to the preparation method provided by the invention, the carboxylic acid groups and the sulfo groups are introduced into the polyaspartic acid structure, therefore, the comprehensive scale inhibiting and dispersing performance can be improved, high scale inhibiting and corrosion inhibiting effects can be ensured, and high biodegradable performance can be achieved.

Description

technical field [0001] The invention relates to a biodegradable scale and corrosion inhibitor polyaspartic acid derivative containing carboxylic acid groups and sulfonic acid groups and a preparation method thereof. Background technique [0002] Circulating cooling water treatment technology has played a very important role in saving water, saving energy and reducing consumption, and solving the problem of global water resource depletion, but circulating water treatment chemicals often cause certain pollution to the environment. Among them, the development of scale inhibitors has gone through stages such as polyphosphates-organophosphates-phosphorus carboxylic acid-organophosphates-polycarboxylic acids-green scale inhibitors. Polyphosphates, organic phosphates, phosphorus carboxylic acids and organic phosphates contain large amounts of phosphorus, which can cause severe eutrophication of water bodies and cause great damage to the water environment. The later polycarboxylate...

Claims

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Application Information

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IPC IPC(8): C08G73/10C02F5/12
Inventor 黄凯孔利傅淑霞
Owner SOUTHEAST UNIV