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Scale inhibitor for circulating 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, strong alkali resistance, and strong alkalinity

Inactive Publication Date: 2018-11-16
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 scale inhibitor for circulating cooling water, which solves the environmental problems caused by 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 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 β-cyclodextrin, 13 parts of modified chitosan, 5 parts of benzotriazole, 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 a mass concentration of 5% malonic acid aqueous solution is prepared into chitosan malonic acid aqueous solution;

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

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

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

Embodiment 2

[0031] A 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 β-cyclodextrin, 10 parts of modified chitosan, 6 parts of benzotriazole, 1 part of fatty alcohol polyoxyethylene ether and water 30 servings.

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

[0034] 1) dissolving chitosan in a mass concentration of 8% malonic acid aqueous solution is prepared into chitosan malonic acid aqueous solution;

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

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

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

Embodiment 3

[0040] A 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 β-cyclodextrin, 15 parts of modified chitosan, 3 parts of benzotriazole, 3 parts of dodecyl glucoside and water 25 servings.

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

[0043] 1) Dissolving chitosan in a mass concentration of 3% malonic acid aqueous solution is prepared into chitosan malonic acid aqueous solution;

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

[0045] 3) adding dimethylaminoethyl acrylate to the chitosan malonate 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.

[0...

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Abstract

The invention discloses a scale inhibitor for circulating cooling water, which is prepared from the following raw materials in parts by weight: 20 to 25 parts of polyepoxysuccinic acid, 12 to 16 partsof polyaspartic acid, 6 to 10 parts of beta-cyclodextrin, 10 to 15 parts of modified chitosan, 3 to 6 parts of benzotriazole, 1 to 3 parts of surfactant and 25 to 30 parts of water. The modified chitosan is prepared mainly by performing a reaction on chitosan and dimethylaminoethyl acrylate; a substitution degree of the modified chitosan is 60 to 85%. The scale inhibitor solves the environment problem caused by a phosphorus containing medicament in existing phosphorus containing circulating cooling water, and has good hydrolysis resistance.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, in particular to a 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 cooling wate...

Claims

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Application Information

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