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Low-phosphorous environment-friendly composite scale and corrosion inhibitor

A scale and corrosion inhibitor, an environmentally friendly technology, applied in the field of industrial circulating water treatment, can solve the problem that water cannot be recycled directly, and achieve the effect of enhancing scale and corrosion inhibition, inhibiting scale formation, and preventing corrosion

Inactive Publication Date: 2013-09-25
北京市龙源科创石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Water is the blood of industry. At present, in industries that consume a lot of water such as industry and agriculture, water conservation is a relatively large issue. The existing better method is to recycle cooling water. However, due to the different quality of industrially discharged water , so that the water cannot be recycled directly, and must go through a series of treatment processes before it can be used in production again

Method used

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  • Low-phosphorous environment-friendly composite scale and corrosion inhibitor
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  • Low-phosphorous environment-friendly composite scale and corrosion inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1) Dissolve 6g of sodium hydroxide in 24g of deionized water, then add 10g of benzotriazole into the aqueous solution of sodium hydroxide, and perform sufficient conventional stirring to completely dissolve it for later use;

[0040] 2) Add 260g of deionized water with a water temperature of 50-60 degrees to 100g of polyepoxysuccinic acid and stir evenly, then add 100g of sodium molybdate, and carry out regular stirring to completely dissolve the sodium molybdate for later use;

[0041] 3) Add 50g of zinc chloride to 144g of deionized water, stir to dissolve it, then add 50g of 2-phosphonic acid-1,2,4,-butane tricarboxylate, and stir to make it evenly mixed for later use ;

[0042]4) Add 100g of acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid into 50g of deionized water, carry out regular stirring, and then add 100g of hydrolyzed polymaleic anhydride.

[0043] 5) Add 1) to 2) for regular stirring, fully mix to form component A, add 3) to 4) for regular stirring,...

Embodiment 2

[0045] 1) Dissolve 4g of sodium hydroxide in 24g of deionized water, then add 12g of benzotriazole into the aqueous solution of sodium hydroxide, and carry out sufficient conventional stirring to completely dissolve it for later use;

[0046] 2) Add 260g of deionized water with a water temperature of 50-60 degrees to 10g of polyepoxysuccinic acid and stir evenly, then add 60g of sodium molybdate, and carry out regular stirring to completely dissolve the sodium molybdate for later use;

[0047] 3) Add 20g of zinc chloride to 144g of deionized water, stir to dissolve it, then add 50g of 2-phosphonic acid-1,2,4,-butane tricarboxylate, and stir to make it evenly mixed for later use ;

[0048] 4) Add 40g of acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid to 50g of deionized water, carry out conventional stirring, and then add 30g of hydrolyzed polymaleic anhydride.

[0049] 5) Add 1) to 2) for regular stirring, fully mix to form component A, add 3) to 4) for regular stirrin...

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Abstract

The invention discloses a low-phosphorous environment-friendly composite scale and corrosion inhibitor. The scale and corrosion inhibitor is characterized by comprising component A and component B, wherein component A includes sodium hydroxide, benzotriazol, polyepoxysuccinic acid, sodium molybdate and deionized water, and the component B includes zinc chloride, 2-phosphonobutane-1,2,4-tricarboxylic acid, acrylic acid / 2-methyl-2-acrylamido-propanesulfonic acid, hydrolytic polymaleic anhydride and deionized water. The scale and corrosion inhibitor provided by the invention is applicable to a recirculating cooling water system with high hardness and high alkalinity, especially has powerful complexation performance on carbonate scale, includes low-content phosphorous, poses no pollution to the environment and accords with requirements of environmental protection. The scale and corrosion inhibitor is applicable to carbon steel and stainless steel recirculating cooling water systems with a pH value in a range of 7.5 to 9.3 and does not need addition of an acid for adjustment of the pH value. As water quality of industries differs, the scale and corrosion inhibitor has a corrosion inhibition effect in a recirculating cooling water system with a small concentration multiple and good scale inhibition performance in a recirculating cooling water system with a great concentration multiple of 3 to 4 times.

Description

technical field [0001] The invention relates to the technical field of industrial circulating water treatment, in particular to a low-phosphorus and environment-friendly composite scale and corrosion inhibitor. Background technique [0002] Water is the blood of industry. At present, in industries with large water consumption such as industry and agriculture, water conservation is a relatively large issue. The existing better method is to recycle cooling water. However, the quality of water discharged from industries is different. , so that the water cannot be directly recycled, and must go through a series of treatment processes before it can be used in production again. [0003] Industrial circulating cooling water systems will encounter some problems when dealing with circulating cooling water, such as scaling, corrosion and microbial hazards in industrial circulating cooling water systems. The existing method to solve the above problems is mainly to add scale and corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC23F11/08C23F14/02
Inventor 闫金铎
Owner 北京市龙源科创石油技术有限公司
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