Novel corrosion and scale inhibitor, and preparation method and application thereof

A corrosion and scale inhibitor, a new type of technology, applied in the field of preparation of new corrosion and scale inhibitors, water treatment chemicals, new corrosion and scale inhibitors, can solve the problem of heat transfer efficiency decline in circulating water systems, complexation balance is easy to be Break down, biological fouling and other problems, achieve the effect of fast film formation, descaling and cleaning the metal surface, and strong adhesion

Inactive Publication Date: 2018-10-09
XIAN JINGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: when the concentration of circulating water increases, the complexation balance of existing conventional corrosion and scale inhibitors in circulating water is easily broken, and circulating water pipelines and equipment are prone to scaling, corrosion and biofouling and other problems, resulting in a decrease in the heat transfer efficiency of the circulating water system and even serious consequences such as corrosion and perforation

Method used

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  • Novel corrosion and scale inhibitor, and preparation method and application thereof
  • Novel corrosion and scale inhibitor, and preparation method and application thereof
  • Novel corrosion and scale inhibitor, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This example provides a new type of corrosion and scale inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0028] Amino trimethylene phosphonic acid: 15%;

[0029] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer: 12%;

[0030] Zinc dihydrogen phosphate: 3%

[0031] Citric acid: 18%;

[0032] Sodium hydroxide: 5%;

[0033] Benzotriazole: 1.5%;

[0034] Deionized water: 45.5%.

[0035] The preparation method of novel corrosion and scale inhibitor described in this embodiment:

[0036] At a temperature of 25°C, add 3 kg of zinc dihydrogen phosphate into a stirred reactor containing 45.5 kg of deionized water for stirring and dissolving. After the dissolution is complete, add 15 kg of aminotrimethylene phosphonic acid, 12 kg of acrylic acid-2 -Acrylamide-2-methylpropanesulfonic acid copolymer, 18kg of citric acid, 1.5kg of benzotriazole were stirred, and finally 5kg of sodium hydroxide was added and ...

Embodiment 2

[0038] This example provides a new type of corrosion and scale inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0039] Butane 2-phospho-1,2,4-tricarboxylate: 20%;

[0040] Carboxylic acid-sulfonic acid-nonionic terpolymer: 15%;

[0041] Disodium hydrogen phosphate: 5%

[0042] Formic acid: 15%;

[0043] Potassium hydroxide: 4%;

[0044] Mercaptobenzothiazole: 1%;

[0045] Deionized water: 40%

[0046] The preparation method of novel corrosion and scale inhibitor described in this embodiment:

[0047] At a temperature of 20°C, add 5 kg of disodium hydrogen phosphate into a stirred reactor filled with 40 kg of deionized water for stirring and dissolving. After the dissolution is complete, add 20 kg of 2-phosphate-1,2,4-tricarboxylic Acid butane, 15kg of carboxylic acid-sulfonic acid-nonionic terpolymer, 15kg of formic acid, 1kg of mercaptobenzothiazole were stirred, and finally 4kg of sodium hydroxide was added and stir...

Embodiment 3

[0049] This example provides a new type of corrosion and scale inhibitor for circulating cooling water system, the mass percentage of each component is as follows:

[0050] Hydroxyethylene diphosphonic acid: 18%;

[0051] Acrylic acid-hydroxyethyl acrylate polymer: 15%;

[0052] Zinc dihydrogen phosphate: 4%

[0053] EDTA: 20%;

[0054] Potassium hydroxide: 8%;

[0055] Benzotriazole: 3%;

[0056] Deionized water: 32%

[0057] The preparation method of novel corrosion and scale inhibitor described in this embodiment:

[0058] At a temperature of 30°C, add 4 kg of zinc dihydrogen phosphate into a stirred reactor filled with 32 kg of deionized water for stirring and dissolving. After the dissolution is complete, 18 kg of hydroxyethylene diphosphonic acid, 15 kg of acrylic acid-acrylic acid Hydroxyethyl ester polymer, 20kg of ethylenediaminetetraacetic acid, 3kg of benzotriazole were stirred, and finally 8kg of potassium hydroxide was added, and stirred until completely dis...

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Abstract

The invention discloses a novel corrosion and scale inhibitor. The novel corrosion and scale inhibitor comprises the following components in percentages by weight: 15-20% of an organic phosphonate, 10-15% of acrylic acid or an acrylic acid copolymer, 3-5% of a phosphate, 10-20% of an organic acid, 4-8% of an inorganic base, 1-3% of an azole derivative and the balance of deionized water. The corrosion and scale inhibitor can form a mesh composite film on a metal surface. The novel corrosion and scale inhibitor can form a layer of mesh composite film on the metal surface, and the mesh compositefilm has a remarkable dirt repelling effect and the corrosion and scale inhibitor is suitable for treatment of circulating cooling water with high alkalinity, high hardness and high content of chloride ions.

Description

technical field [0001] The invention belongs to the technical field of chemical circulating water treatment, relates to water treatment chemicals, and in particular to a novel corrosion and scale inhibitor. The invention also provides a preparation method of the novel corrosion and scale inhibitor and its application in circulating cooling water treatment. Background technique [0002] Water resources are basic natural resources and strategic economic resources. They are not only the lifeblood of human survival and development, but also the controlling elements of the ecological environment. Water is the bond of all things, the foundation of life, the lifeblood of social and economic development, and an irreplaceable precious natural resource. However, due to the influence of many human factors such as global warming and over-cultivation and deforestation, fresh water resources have been drastically reduced. Water shortage has become a worldwide problem and one of the bottl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/10C02F103/02
CPCC02F5/105C02F5/145C02F2103/023C02F2303/04C02F2303/08
Inventor 李佐东孟丽张小凤杨赞
Owner XIAN JINGDA CHEM
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