Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same

A corrosion and scale inhibitor, aspartic acid technology, applied in chemical instruments and methods, scale removal and water softening, water/sludge/sewage treatment, etc., to achieve good scale inhibition effect, good biodegradability and slow down. Corrosion performance, improve the effect of scale inhibition and dispersibility

Inactive Publication Date: 2009-05-13
HEBEI ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Synthesis and performance research of polyaspartic acid derivatives [J]. Petrochemical Industry, 2003, 32 (9): 792-795.) Introduced hydroxyl and sulfonic acid groups in the polyaspartic acid molecule, (Research on the scale inhibition performance of polyaspartic acid containing phosphono group [J]. Industrial Water Treatment, 2004, 24 (9): 22-24.) Introduced phosphonic acid group, (modified polyaspartic acid The synthesis and antiscaling properties of polyaspartic acid [J]. Industrial Water Treatment, 2008, 28 (8): 38-40.) introduced phosphono groups, but the introduction of carboxylic acid groups in the molecular structure of polyaspartic acid has not yet see the report

Method used

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  • Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same
  • Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same

Examples

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Effect test

Embodiment 1

[0024] Take 300 grams of aspartic acid and crush it in a mortar. After passing through a 180-mesh sieve, spread it on a medical tray. Then put the tray into an electric blast drying box for polycondensation reaction. The reaction temperature is 240°C and the reaction time is 4 hours. Stir once for 1 hour to obtain 217 grams of yellow-brown polysuccinimide solid; Dissolve 13.3 grams of aspartic acid in water and add 17.6 grams of 25% sodium hydroxide aqueous solution dropwise with stirring, and control the reaction temperature to 20-50°C ; Add 9.7 grams of polysuccinimide to a four-necked flask equipped with a stirring, thermometer and dropping funnel, then add 30 mL of water to suspend it in the water, and slowly add dropwise sodium hydrogen aspartate solution under stirring, Adjust the pH to 8 with 25% sodium hydroxide aqueous solution every half an hour and react for 24 hours to obtain a reddish-brown polyaspartic acid derivative aqueous solution. Adjust the pH to 2~3 with hydro...

Embodiment 2

[0026] Take 300 grams of aspartic acid and crush it in a mortar, spread it through a 180-mesh sieve, and spread it on a medical tray. Then put the tray into an electric blast drying box for polycondensation reaction. The reaction temperature is 230 ℃, and the reaction time is 5 hours. Stir once for 1 hour to obtain 217 grams of yellow-brown polysuccinimide solid; dissolve 15.96 grams of aspartic acid in water and add 23.04 grams of 25% sodium hydroxide aqueous solution dropwise under stirring, and control the reaction temperature to 20-50°C ; Add 9.7 grams of polysuccinimide to a four-necked flask equipped with a stirring, thermometer and dropping funnel, then add 30 mL of water to suspend it in the water, and slowly add dropwise sodium hydrogen aspartate solution under stirring, Adjust the pH to 9 with 25% sodium hydroxide aqueous solution every half hour, react for 24 hours to obtain a reddish-brown polyaspartic acid derivative aqueous solution, adjust the pH to 2 to 3 with hydr...

Embodiment 3

[0028] Take 300 grams of aspartic acid and crush it in a mortar. After passing through a 180-mesh sieve, spread it on a medical tray. Then put the tray into an electric blast drying oven for polycondensation reaction. The reaction temperature is 250°C and the reaction time is 3.5 hours. Stir once every 1 hour to obtain 217 grams of yellow-brown polysuccinimide solid; dissolve 15.96 grams of aspartic acid in water and add 24.96 grams of 25% sodium hydroxide aqueous solution dropwise under stirring, and control the reaction temperature to 20-50 ℃; Add 9.7 grams of polysuccinimide into a four-necked flask equipped with a stirring, thermometer and dropping funnel, then add 30 mL of water to suspend it in the water, and slowly add sodium hydrogen aspartate solution dropwise under stirring , Adjust the pH to 10 with 25% sodium hydroxide aqueous solution every half an hour, react for 24 hours to obtain a reddish-brown polyaspartic acid derivative aqueous solution, adjust the pH to 2-3 wi...

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Abstract

The invention relates to a biodegradable antisludging inhibitor, namely an olefin-containing poly(aspartic acid) derivate and a preparation method thereof. The preparation method for the olefin-containing poly(aspartic acid) derivate comprises the following steps: (1) an aspartic acid is taken as a raw material and subjected to thermal polycondensation to generate polysuccinimide; (2) a sodium hydrogen aspartate solution is prepared; (3) an olefin-containing poly(aspartic acid) derivate aqueous solution is generated by utilizing aminolysis reaction; and (4) alcohol extraction, filtration and drying are performed. The olefin-containing poly(aspartic acid) derivate has the advantages that: due to introduction of an aspartic acid group in a poly(aspartic acid) structure of the olefin-containing poly(aspartic acid) derivate, the olefin-containing poly(aspartic acid) derivate improves the scale inhibition and dispersion capacities, and has good scale inhibition effect, good biodegradability and corrosion inhibition and strong heat resistance. The preparation method is simple. Moreover, the product can be widely applied in the aspects of circulating and cooling water systems, boiler water, oil field water, seawater desalination and so on.

Description

Technical field [0001] The invention relates to a biodegradable corrosion and scale inhibitor-carboxylic acid group-containing polyaspartic acid derivative and a preparation method thereof. The corrosion and scale inhibitor is used for scale and corrosion inhibition treatment of industrial circulating water. Background technique [0002] Although the circulating cooling water treatment technology is a technology developed to solve environmental problems, it has played a very important role in saving water, energy saving and reducing consumption, and solving the problem of global water depletion, but at the same time, the use of circulating water treatment chemicals It also has a certain impact on the environment. The development of scale inhibitors has gone through several stages of inorganic polyphosphate-organic phosphoric acid (salt)-binary and ternary phosphorus-containing copolymers and binary and ternary phosphorus-free copolymers, and non-phosphorus scale inhibitors will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 高玉华刘振法张利辉田彩莉闫美芳
Owner HEBEI ENERGY RES INST
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