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Compound corrosion and scale inhibitor

A technology of corrosion and scale inhibitor, acrylic acid, applied in descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., to solve corrosion, wide application range, good corrosion and scale inhibition performance Effect

Inactive Publication Date: 2009-10-21
XIAN XIELI POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above scale and corrosion inhibitors, and provide a composite corrosion and scale inhibitor that is less corrosive to water cooling system equipment and less polluting to the environment

Method used

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  • Compound corrosion and scale inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 100g of raw materials used in the preparation of composite corrosion and scale inhibitor as an example and its mass ratio is as follows:

[0039] Hydroxyethylene diphosphonic acid 25g

[0040] Polyacrylic acid 20g

[0041] Hydrolyzed Polymaleic Anhydride 5g

[0042] Benzotriazole 2g

[0043] Triethylenetetramine hexamethylenesulfonate 18g

[0044] Alcohol 4g

[0045] water 26g

[0046] The molecular weight of above-mentioned polyacrylic acid is 2000~10000, and solid content is 30%, and the molecular weight of hydrolyzed polymaleic anhydride is 400~800, and solid content is 48%, and the active component of hydroxyethylene diphosphonic acid is 60%, , the active ingredient of triethylenetetramine hexamethylenesulfonate is 50%.

[0047] Its preparation method is as follows:

[0048] Stir and mix hydroxyethylene diphosphonic acid, polyacrylic acid, hydrolyzed polymaleic anhydride, triethylenetetramine hexamethylene sulfonate, alcohol, and water, and then add diss...

Embodiment 2

[0050] Take the raw material 100g used for preparing composite corrosion and scale inhibitor as an example and its preparation method is as follows:

[0051] Hydroxyethylene diphosphonic acid 21g

[0052] Polyacrylic acid 20g

[0053] Hydrolyzed Polymaleic Anhydride 2g

[0054] Benzotriazole 1g

[0055] Triethylenetetramine hexamethylenesulfonate 15g

[0056] Alcohol 6g

[0057] water 35g

[0058] The molecular weight of above-mentioned polyacrylic acid is 2000~10000, and solid content is 30%, and the molecular weight of hydrolyzed polymaleic anhydride is 400~800, and solid content is 48%, and the active component of hydroxyethylene diphosphonic acid is 60%, , the active ingredient of triethylenetetramine hexamethylenesulfonate is 50%.

[0059] Its preparation method is identical with embodiment 1.

Embodiment 3

[0061] Take the raw material 100g used for preparing composite corrosion and scale inhibitor as an example and its preparation method is as follows:

[0062] Hydroxyethylene diphosphonic acid 30g

[0063] Polyacrylic acid 10g

[0064] Hydrolyzed Polymaleic Anhydride 10g

[0065] Benzotriazole 3g

[0066] Triethylenetetramine hexamethylenesulfonate 15g

[0067] Alcohol 4g

[0068] water 28g

[0069] The molecular weight of above-mentioned polyacrylic acid is 2000~10000, and solid content is 30%, and the molecular weight of hydrolyzed polymaleic anhydride is 400~800, and solid content is 48%, and the active component of hydroxyethylene diphosphonic acid is 60%, , the active ingredient of triethylenetetramine hexamethylenesulfonate is 50%.

[0070] Its preparation method is identical with embodiment 1.

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Abstract

The invention relates to a compound corrosion and scale inhibitor which comprises the following raw materials according to mass ratio: 15%-30% of organic phosphonic acid, 10%-20% of acrylic acid or acrylic acid copolymer, 2%-10% of poly-maleic acid, 1%-3% of azole ramifications, 15%-30% of multivariate organic sulfonate, 2%-6% of dimethyl formamide and 20%-35% of water. The compound corrosion and scale inhibitor of the invention is used for a system which employs normal water as circulating cooling water, so as to solve corrosion problem caused by circulating water of normal-water to equipment. Corrosion rate of copper product is lower than the national standard of 0.005mm / a, thereby generating no equipment scaling caused by calcium phosphate deposition. Compared with corrosion inhibitors of the same kind, the compound corrosion and scale inhibitor has a lower dosage and is effective in corrosion and scale inhibiting. The compound corrosion and scale inhibitor is simple in operation, convenient, quick, safe and efficient.

Description

technical field [0001] The invention relates to a high-efficiency composite corrosion and scale inhibitor for circulating cooling water. Especially reclaimed water is used as circulating cooling water, corrosion and scale inhibitors used in circulating cooling water systems with large chlorine radicals and high pH. Background technique [0002] my country is a country seriously short of water resources and one of the 13 water-poor countries in the world. Among them, the per capita water resources of 18 provinces, municipalities, and autonomous regions are lower than the 2000m per capita water resources reviewed by the United Nations Sustainable Development Commission. 3 , less than 1000m in 10 provinces, municipalities and autonomous regions 3 It is predicted that the total water supply capacity in China in 2010 will be (6.2~6.5)×1011m 3 The total water demand is 7.3×1011m 3 , the gap between supply and demand is nearly 1×1011m 3 . The serious shortage of water supply w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 马宏良贺科峰田美宁
Owner XIAN XIELI POWER TECH
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