Scale and corrosion inhibitor and preparation method thereof

A scale and corrosion inhibitor, weight percentage technology, applied in the field of scale and corrosion inhibitors and their preparation, can solve the problems of low concentration of circulating water, high phosphorus content of corrosion inhibitors, large sewage discharge, etc., to achieve synergistic resistance Scale and corrosion inhibition performance, low corrosion rate, pollution reduction effect

Active Publication Date: 2013-09-18
CHENGDU WANCHAO SURFACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a scale and corrosion inhibitor and its preparation method to solve the problems of low concentration o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A scale and corrosion inhibitor is composed of the following components by weight percentage:

[0029] 5% hydroxyethylidene diphosphonic acid, 15% 2-phosphinecarboxylic acid-1.2.4-tricarboxylic acid, 15% polyamino polyether methylene phosphonic acid, 8% zinc sulfate heptahydrate, 30% acrylic acid-2- Acrylamide-2-methylpropanesulfonic acid, 5% nonylphenol ethoxylate, 2% benzotriazole, 20% purified water.

[0030] The preparation method is as follows: according to the ratio of the above-mentioned components, first add pure water and benzotriazole into the stirring tank and then stir; then add hydroxyethylidene diphosphonic acid, and after being dissolved, add zinc sulfate heptahydrate; Finally, add 2-phosphinecarboxylic acid-1.2.4-tricarboxylic acid, polyaminopolyether-based methylene phosphonic acid, nonylphenol polyoxyethylene ether, and stir for 1 hour to obtain the product.

[0031] When in use, the prepared scale and corrosion inhibitor product is continuously added...

Embodiment 2

[0033] A scale and corrosion inhibitor is composed of the following components by weight percentage:

[0034] 5% hydroxyethylidene diphosphonic acid, 12.5% ​​2-phosphinecarboxylic acid-1.2.4-tricarboxylic acid, 12.5% ​​polyamino polyether methylene phosphonic acid, 8% zinc sulfate heptahydrate, 35% acrylic acid-2- Acrylamide-2-methylpropanesulfonic acid, 5% nonylphenol ethoxylate, 2% benzotriazole, 20% purified water. Its preparation method and use method are identical with embodiment 1.

Embodiment 3

[0036] A scale and corrosion inhibitor is composed of the following components by weight percentage:

[0037] 5% hydroxyethylidene diphosphonic acid, 10% 2-phosphinecarboxylic acid-1.2.4-tricarboxylic acid, 10% polyamino polyether methylene phosphonic acid, 8% zinc sulfate heptahydrate, 30% acrylic acid-2- Acrylamide-2-methylpropanesulfonic acid, 5% nonylphenol ethoxylate, 2% benzotriazole, 30% purified water. Its preparation method and use method are identical with embodiment 1.

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PUM

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Abstract

The invention discloses a scale and corrosion inhibitor and a preparation method thereof. The problems of low concentration multiple of circulating water, large water consumption, large discharge capacity, danger caused by adding sulfuric acid to regulate the pH, high phosphorus content of the scale and corrosion inhibitor and environmental pollution in the prior art are solved. The scale and corrosion inhibitor disclosed by the invention is composed of the following components in percentage by weight: 5-10% of hydroxyl ethidene phosphonic acid, 10-20% of 2-phosphine carboxylic acid-1.2.4- tricarboxylic acid, 10-20% of polyamino polyether methylene phosphonate, 20-40% of acrylic acid-2- acrylamide-2- methylpropanesulfonic acid, 1-5% of nonylphenol polyoxyethylene ether, 5-10% of zinc sulfate heptahydrate, 1-5% of benzotriazole and 10-30% of pure water. The invention further provides a preparation method of the scale and corrosion inhibitor. The scale and corrosion inhibitor disclosed by the invention is low in zinc salt and phosphorus salt contents and is capable of preventing the scale deposition on one hand and reducing the water pollution on the other side, thereby being beneficial to environmental protection.

Description

technical field [0001] The invention relates to a scale and corrosion inhibitor and a preparation method thereof. Background technique [0002] At present, in order to prevent scaling, corrosion and bacterial growth of equipment heat exchange devices caused by industrial circulating cooling water, chemical agents such as scale inhibitors, corrosion inhibitors, and bactericides are usually added to the cooling water, which are commonly called water quality stabilizers. , using the synergistic effect of these agents can improve the stability of cooling water and reduce production costs. At present, the commonly used monomers are polyphosphate (tripolyphosphate, hexametaphosphate, etc.), organic phosphonic acid (HEDP, ATMP, EDTMP, DTMPPA, etc.), organic phosphine carboxylic acid (PBTCA), dispersant homopolymer (PAA, HPMA, PESA, PASP, etc.), dispersant copolymer (AA-MA, AA-AMPS, T-225, etc.). Commonly used compound formulas are: chromate + zinc salt, polyphosphate + zinc salt,...

Claims

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Application Information

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IPC IPC(8): C02F5/08C02F5/10C02F5/14
Inventor 刘良
Owner CHENGDU WANCHAO SURFACE TECH CO LTD
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