Low-phosphorus composite antiincrustation corrosion inhibitor and its use for water treatment

A scale and corrosion inhibitor, polymer technology, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. Achieve the effect of reducing environmental hazards, good comprehensive performance and good corrosion inhibition performance

Active Publication Date: 2006-03-08
BEIJING YANHUA PETRO CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commonly used organic phosphine cannot effectively inhibit calcium phosphate scale and zinc scale and solve the problem of iron oxide precipitation, and it is easy to form organic phosphonic acid scale
In addition, the pollution of phosphorus-containing compounds to water bodies and the resulting eutrophication have made people gradually realize the importance of controlling the discharge of phosphorus-containing compounds. Environmental protection departments in many countries have issued corresponding regulations to limit the discharge of phosphorus-containing compounds, such as Germany has required that the discharge of phosphorus is less than or equal to 1mg / L, and the phosphorus content in the circulating water of the commonly used organic phosphine formula is generally 4-10mg / L, so the application of commonly used organic phosphine will be limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Taking by weighing 4.0g effective content is 50% PBTCA, 5.0g solid content is 40% polyaspartic acid, 60.0g solid content is 30% T225 (30 ℃ when limiting viscosity is 0.078dl / g, weight ratio AA / HPA=80 / 20), add 31.0 g of water, shake well, and obtain 100.0 g of the medicament to be prepared.

[0046] When the prepared medicament was added to the test raw water 1 at a medicament concentration of 100 mg / L, the effective concentrations of PBTCA, polyaspartic acid, and T225 in the water were 2 mg / L, 2 mg / L, and 18 mg / L respectively. Phosphorus (as PO 4 3- Calculated) is 0.7mg / L.

Embodiment 2

[0048] Weigh 5.0g effective content of 40% HPAA, 50.0g solid content of 40% polyepoxysuccinic acid and 30.0g solid content of 30% AA / AMPS simultaneously containing carboxylic acid group and sulfonic acid group binary copolymer (At 30°C, the limiting viscosity is 0.074dl / g, and the weight ratio is AA / AMPS=70 / 30), add it into 15.0g of water, shake well, and obtain 100.0g of the medicament solution to be prepared.

[0049] When the prepared drug solution is added to the test raw water 1 at a drug concentration of 100mg / L, the effective concentration of the binary copolymer containing carboxylic acid groups and sulfonic acid groups in the water is HPAA, polyepoxysuccinic acid, AA / AMPS 2mg / L, 20mg / L, 9mg / L respectively, total phosphorus in water (as PO 4 3- Calculated) is 0.9mg / L.

Embodiment 3

[0051] Taking by weighing 6.0g effective content is 50% PBTCA, 20.0g solid content is 40% polyaspartic acid, 10.0g solid content is 40% polyepoxysuccinic acid and 26.7g solid content is 30% T225 ( At 30°C, the limiting viscosity is 0.078dl / g, and the weight ratio is AA / HPA=80 / 20), added to 37.3g of water, shaken well, and 100.0g of the medicament solution to be prepared is obtained.

[0052] When the prepared chemical solution is added to the test raw water 1 at a chemical concentration of 100 mg / L, the effective concentrations of PBTCA, polyaspartic acid, polyepoxysuccinic acid and T225 in the water are 3 mg / L and 8 mg / L respectively , 4mg / L, 8mg / L, total phosphorus in water (as PO 4 3- Calculated) is 0.7mg / L.

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Abstract

This invention relates to a sort of low-phosphor scale-corrosion inhibitor which includes PBTCA, (and/or HPAA), poly-aspartic acid and/or polyepoxysuccinic acid and carboxyl-containing polymer. This inhibitor can be used to treat recirculated cooling water in ways such as inhibiting the forming of CaCO3 scale, inhibiting corrosion and stabilizing Zn2+ in water. Its phosphor concentration in recirculated water is no more than 1mg/L, reducing the hazard of phosphor discharge to environment.

Description

technical field [0001] The invention relates to a low-phosphorus 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 (DEP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC23F11/08C23F11/10C23F11/173C23F14/02
Inventor 郦和生郭红卫张春原
Owner BEIJING YANHUA PETRO CHEM
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