Composite slow-release scale inhibitor

A scale inhibitor and slow-release technology, applied in the field of scale inhibitor, can solve the problems of poor scale inhibitor effect, too fast digestion of scale inhibitor, good anti-hydrolysis performance, etc. Good hydrolysis performance

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 composite slow-release scale inhibitor, which solves the problems of too fast digestion and poor scale inhibition effect of the traditional orthophosphate metal salt scale inhibitor, and has good hydrolysis resistance

Method used

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  • Composite slow-release scale inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A composite slow-release antiscalant, according to parts by weight, including the following raw materials:

[0023] 23 parts of polyepoxysuccinic acid, 14 parts of polyacrylic acid, 8 parts of hydrolyzed maleic anhydride, 13 parts of modified chitosan, 5 parts of sodium gluconate, 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 ...

Embodiment 2

[0031] A composite slow-release antiscalant, according to parts by weight, including the following raw materials:

[0032] 20 parts of polyepoxysuccinic acid, 12 parts of polyacrylic acid, 10 parts of hydrolyzed maleic anhydride, 10 parts of modified chitosan, 6 parts of sodium gluconate, 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 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 th...

Embodiment 3

[0040] A composite slow-release antiscalant, according to parts by weight, including the following raw materials:

[0041] 25 parts of polyepoxysuccinic acid, 16 parts of polyacrylic acid, 6 parts of hydrolyzed maleic anhydride, 15 parts of modified chitosan, 3 parts of sodium gluconate, 3 parts of lauryl 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 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 pr...

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Abstract

The invention provides a composite slow-release scale inhibitor. The composite slow-release scale inhibitor is prepared from the following raw materials in parts by weight: 20-25 parts of polyepoxysuccinic acid, 12-16 parts of polyacrylic acid, 6-10 parts of hydrolyzed maleic anhydride, 10-15 parts of modified chitosan, 3-6 parts of sodium gluconate, 1-3 parts of surfactants and 25-30 parts of water; the modified chitosan is mainly obtained through reaction between the chitosan and dimethylaminoethyl acrylate, and the substitution degree of the modified chitosan is 60-85%. By the scale inhibitor with high hydrolysis resistance, the problems of high consumption speed and poor scale inhibition effect of conventional metal orthophosphate scale inhibitors are solved.

Description

technical field [0001] The invention belongs to the technical field of scale inhibitors, in particular to a composite slow-release scale inhibitor. 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] The most commonly used scale inhibitor...

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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