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Slow release scale inhibition agent for circulation cooling water

A technology of circulating cooling water and scale inhibitors, which is applied in the field of scale inhibitors, can solve the problems of good hydrolysis resistance and achieve the effects of improving stability, improving thermal stability, and strong alkali resistance

Inactive Publication Date: 2018-11-23
芜湖市颂晖商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a slow-release scale inhibitor for circulating cooling water. The scale inhibitor solves the environmental problems caused by the phosphorus-containing chemicals in the existing phosphorus-containing circulating cooling water, and has good hydrolysis resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A slow-release scale inhibitor for circulating cooling water, comprising the following raw materials in parts by weight:

[0023] 23 parts of polyepoxysuccinic acid, 14 parts of polyaspartic acid, 8 parts of starch, 13 parts of modified chitosan, 6 parts of mercaptobenzothiazole, 2 parts of lauryl monoethanolamine and 28 parts of water.

[0024] The degree of substitution of the modified chitosan is 70%, and its preparation method comprises the following steps:

[0025] 1) dissolving chitosan in mass concentration is 5% oxalic acid aqueous solution, is mixed with chitosan oxalic acid aqueous solution;

[0026] 2) Heat the chitosan oxalic acid aqueous solution in a water bath to 60°C while stirring for 30 minutes;

[0027] 3) adding dimethylaminoethyl acrylate to the chitosan oxalic acid aqueous solution in step 2), after reacting for 6h, cooling to room temperature to obtain the reaction product;

[0028] 4) Recrystallize the reaction product, and then dry the crystal...

Embodiment 2

[0031] A slow-release scale inhibitor for circulating cooling water, comprising the following raw materials in parts by weight:

[0032] 20 parts of polyepoxysuccinic acid, 12 parts of polyaspartic acid, 10 parts of starch, 10 parts of modified chitosan, 8 parts of mercaptobenzothiazole, 1 part of fatty alcohol polyoxyethylene ether and 30 parts of water.

[0033] The degree of substitution of modified chitosan is 85%, and its preparation method comprises the following steps:

[0034] 1) dissolving chitosan in mass concentration is 8% oxalic acid aqueous solution, is mixed with chitosan oxalic acid aqueous solution;

[0035] 2) Heat the chitosan oxalic acid aqueous solution in a water bath to 70°C while stirring for 20 minutes;

[0036] 3) adding dimethylaminoethyl acrylate to the chitosan oxalic acid aqueous solution in step 2), after reacting for 3 hours, cooling to room temperature to obtain the reaction product;

[0037] 4) Recrystallize the reaction product, and then dr...

Embodiment 3

[0040] A slow-release scale inhibitor for circulating cooling water, comprising the following raw materials in parts by weight:

[0041] 25 parts of polyepoxysuccinic acid, 16 parts of polyaspartic acid, 6 parts of starch, 15 parts of modified chitosan, 4 parts of mercaptobenzothiazole, 3 parts of dodecyl glucoside and 25 parts of water.

[0042] The degree of substitution of modified chitosan is 60%, and its preparation method comprises the following steps:

[0043] 1) Dissolving chitosan in a 3% oxalic acid aqueous solution to prepare chitosan oxalic acid aqueous solution;

[0044] 2) Heat the chitosan oxalic acid aqueous solution in a water bath to 62°C while stirring for 28 minutes;

[0045] 3) adding dimethylaminoethyl acrylate to the chitosan oxalic acid aqueous solution in step 2), after reacting for 3.6h, cooling to room temperature to obtain the reaction product;

[0046] 4) Recrystallize the reaction product, and then dry the crystallized product.

[0047] The mas...

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Abstract

The invention provides a slow release scale inhibition agent for circulation cooling water. The slow release scale inhibition agent for circulation cooling water is prepared from the following raw materials in parts by weight: 20 to 25 parts of polyepoxysuccinic acid, 12 to 16 parts of polyaspartic acid, 6 to 10 parts of starch, 10 to 15 parts of modified chitosan, 4 to 8 parts of mercaptobenzothiazole, 1 to 3 parts of surfactants and 25 to 30 parts of water, wherein the modified chitosan is mainly prepared from chitosan and DMAEA through reaction, and has the substitution value being 60 to 85percent. The scale inhibition agent solves the environment problem caused by phosphoric chemicals in the existing phosphoric circulation water; the hydrolysis-resistant performance is good.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, in particular to a slow-release scale inhibitor for circulating cooling water. Background technique [0002] Scale inhibitors are a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment. The anti-corrosion and anti-scaling agent for cold replacement equipment is made of epoxy resin and specific amino resin as the base material, and is formulated by adding appropriate amount of various additives. It is a single component. It has excellent shielding, anti-seepage, anti-rust properties, good scale resistance, thermal conductivity, excellent resistance to weak acids, strong alkalis, organic solvents, etc. It has strong adhesion, and the film layer is bright, flexible, dense, and hard. . [0003] In the circulating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
CPCC02F5/12C02F2303/08C02F2303/22
Inventor 汪泽维汪鹏
Owner 芜湖市颂晖商贸有限公司
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