Non-phosphorus composite anti- incrustation corrosion inhibiter and its application in water treatment

A technology of scale and corrosion inhibitor, scale inhibitor and dispersant, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve problems such as environmental pollution, achieve good comprehensive performance, Solve environmental hazards and improve the effect of corrosion inhibition performance

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the formula contains inorganic phosphorus a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Take by weighing 20.0g anhydrous sodium molybdate, 29.5g sodium tetraborate decahydrate (containing B 4 o 7 2- 40.7%), 55.0g sodium gluconate, 20.0g solid content is 40% polyaspartic acid (molecular weight 3000) and 1.0g benzotriazole joins in 74.5g water, shakes up, promptly obtains the required preparation 200.0g potion.

[0062] When adding the prepared medicament to the test water at a medicament concentration of 200mg / L, sodium molybdate and sodium tetraborate (in B 4 o 7 2- The effective concentrations of sodium gluconate, polyaspartic acid, and benzotriazole are 20mg / L, 12mg / L, 30mg / L, 8mg / L, and 1mg / L, respectively.

Embodiment 2

[0064] Take by weighing 35.3g sodium molybdate dihydrate, 94.8g sodium metasilicate nonahydrate (containing SiO 2 21.1%), 20.0g sodium gluconate, and 25.0g polyepoxysuccinic acid (molecular weight 1000) with a solid content of 40% were added to 74.9g of water and shaken up to obtain 250.0g of the medicament solution to be prepared.

[0065] When adding the prepared drug solution to the test water at a drug concentration of 250 mg / L, sodium molybdate and sodium silicate (as SiO 2 The effective concentrations of sodium gluconate and polyepoxysuccinic acid are 30mg / L, 20mg / L, 20mg / L, and 10mg / L, respectively.

Embodiment 3

[0067] Weigh 20.0g anhydrous sodium tungstate, 71.3g sodium tetraborate pentahydrate (containing B 4 o 7 2- 53.3%), 61.3g sodium silicate (containing SiO 2 32.6%), 20.0g of polymaleic anhydride (molecular weight: 1000) with a solid content of 50% were added to 77.4g of water, and shaken up to obtain 250.0g of the medicament solution required for preparation.

[0068] When the prepared drug solution is added to the test water at a drug concentration of 250mg / L, sodium tungstate and sodium tetraborate (in B 4 o 7 2- In terms of), sodium silicate (as SiO 2 Calculate), the effective concentration of polymaleic anhydride is 20mg / L, 38mg / L, 20mg / L, 10mg / L respectively.

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Abstract

The invention relates to a non-phosphorus composite anti-incrustation corrosion inhibiter, the non-phosphorus composite anti-incrustation corrosion inhibiter comprises a) water-soluble molybdate and/or water-soluble tungstate; b) two different salts in water-soluble borate, water-soluble gluconate and water-soluble silicate; and c) at least an anti-incrustation dispersant, wherein the anti-incrustation dispersant is a non-phosphorus polymer containing carboxylic acid groups. The non-phosphorus composite anti-incrustation corrosion inhibiter of the present invention has the advantages of good combination property, possesses excellent function to block CaCO3 incrustation, has good capability for stabilizing Zn<2+> in water and corrosion slowing performance, can be used for circulating cooling water process and solves the environmental hazard caused by the drainage of phosphorus.

Description

technical field [0001] The invention relates to a phosphorus-free composite scale and corrosion inhibitor and its application in circulating cooling water treatment. Background technique [0002] In the circulating cooling water system, there are mainly three problems of scaling, corrosion and microbial hazards. The most convenient and effective way to prevent system scaling and corrosion is to add corrosion and scale inhibitors to the circulating cooling water. At present, most of the formulas commonly used in the treatment of circulating cooling water in China are phosphine-based formulas, and the main agent is containing phosphonic acid groups (-PO 3 h 2 ) Corrosion and scale inhibitors directly connected to carbon atoms, often called organic phosphonic acids. They mainly include: hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylene phosphonic acid (ATMP), ethylenediaminetetramethylenephosphonic acid (EDTMP), diethylenetriaminepentamethylenephosphonic acid (DE...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12
CPCC23F14/02
Inventor 秦会敏郦和生楼琼慧李博伟张春原
Owner CHINA PETROLEUM & CHEM CORP
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