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Composite anti-dirty corrosion inhibiting agent and application thereof

A technology of scale and corrosion inhibitors and copolymers, which is applied in the directions of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc. Corrosion performance, good scale inhibition performance, and good scale inhibition performance

Active Publication Date: 2005-04-06
中国石油化工股份有限公司北京燕山分公司研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent application CN1258649A discloses a multi-component compound scale and corrosion inhibitor suitable for sewage reuse. The main components are organic phosphonic acid, sulfonic acid-containing copolymer and zinc salt. Corrosion problem, but the scale inhibition effect of this formula is not ideal

Method used

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  • Composite anti-dirty corrosion inhibiting agent and application thereof
  • Composite anti-dirty corrosion inhibiting agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in the four-necked flask equipped with stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20° C.), 26.6 g of formaldehyde aqueous solution (36% of active ingredients) was added. Control the reaction temperature below 50° C. with a cold water bath, and add 45.2 g of phosphorus trichloride dropwise (the active ingredient is calculated as 97%). After the dropwise addition of phosphorus trichloride is complete, raise the temperature to 70±2°C and keep it warm for 2 hours, then cool to obtain the product. The organic phosphine content of the product was 8.2%.

Embodiment 2

[0071] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in the four-necked flask equipped with stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20° C.), 26.6 g of formaldehyde aqueous solution (36% of active ingredients) was added. Control the reaction temperature below 50° C. with a cold water bath, and add 45.2 g of phosphorus trichloride dropwise (the active ingredient is calculated as 97%). After the dropwise addition of phosphorus trichloride is complete, raise the temperature to 105±2°C and keep it warm for 2 hours, then cool to obtain the product. The organic phosphine content of the product was 7.3%.

Embodiment 3

[0073] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in the four-necked flask equipped with stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20° C.), 26.6 g of formaldehyde aqueous solution (36% of active ingredients) was added. Control the reaction temperature below 50° C. with a cold water bath, and add 45.2 g of phosphorus trichloride dropwise (the active ingredient is calculated as 97%). After the dropwise addition of phosphorus trichloride is complete, raise the temperature to 90±2°C and keep it warm for 4 hours, then cool to obtain the product. The organic phosphine content of the product is 9.5%.

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Abstract

The invention relates to a compound encrustation-blocking corrosion inhibitor. It includes phosphonic acid containing poly aspartic acid and at least one corrosion inhibitor. It has good complex encrustation-blocking corrosion inhibitor combination property. It has good function to blocking CaCO3 and Ca3(PO4)2, stabilizes Zn2+ in water and corrosion inhibits. The invention can be used to circulating cooling water process to increase the condense multiple. For example, it can be used under the situation of the sum of calcium hardness and total alkalinity reached to 1200mg / L after condense of the circulation cooling water.

Description

Technical field [0001] The present invention relates to a composite scale and corrosion inhibitor and its application in circulating cooling water treatment. Specifically, the invention relates to a composite scale and corrosion inhibitor containing phosphonic acid group polyaspartic acid and its application in circulating cooling water treatment. Application in circulating cooling water treatment. Background technique [0002] There are three channels for industrial water conservation from the perspective of industrial production: increasing the concentration ratio of circulating water, reforming processes, and reusing sewage. Among them, increasing the concentration ratio of circulating water is the most direct and effective way. Compared with sewage reuse, it has the following advantages: First, there is no need to increase infrastructure investment; second, the operation safety factor is higher than that of sewage reuse, because sewage has many Uncertain factors, and th...

Claims

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Application Information

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IPC IPC(8): C02F5/14C23F11/167
CPCC23F14/02
Inventor 郦和生王亭王吉龙
Owner 中国石油化工股份有限公司北京燕山分公司研究院
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