Composite scale and corrosion inhibitor, and applications thereof in circulated cooling water treatment

A technology of scale and corrosion inhibitor and cyclodextrin, which is used in composite scale and corrosion inhibitor and its application in circulating cooling water treatment, to avoid environmental problems, have good scale and corrosion inhibition performance, and meet the requirements of scale and corrosion inhibition. The effect of eclipse requirements

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite scale and corrosion inhibitor not only meets the requirements of circulating cooling water for scale and corrosion inhibition, but also solves the environmental problems caused by the phosphorus-containing chemicals in the existing phosphorus-containing circulating cooling water

Method used

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  • Composite scale and corrosion inhibitor, and applications thereof in circulated cooling water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 30.0g carboxymethyl inulin (the degree of substitution is 1.0), 10.0g α-cyclodextrin (purchased from Shandong Binzhou Zhiyuan Biotechnology Co., Ltd.) and 18.0g polyepoxysuccinic acid (limiting viscosity at 30°C 0.078dl / g), add 42.0g of water, and shake well to obtain composite scale and corrosion inhibitor stock solution S1.

[0046] Take 1g of the prepared composite scale and corrosion inhibitor stock solution S1 and add it to 10L of test water 1, so that the effective concentrations of carboxymethyl inulin, α-cyclodextrin and polyepoxysuccinic acid in the water are 6mg / L and 10mg respectively / L and 9mg / L, and then measure the calcium carbonate scale inhibition performance and corrosion inhibition performance according to the method in the test example.

Embodiment 2

[0048] Weigh 3.14g of zinc chloride, dissolve it in 9.0g of polyaspartic acid (limited viscosity number is 0.074dl / g at 30°C), then add 15.0g of carboxymethyl inulin raw material (degree of substitution is 0.6) and 18.0 gγ-cyclodextrin (purchased from Shandong Binzhou Zhiyuan Biotechnology Co., Ltd.), and then add 34.86 g of water, and shake well to obtain the composite scale and corrosion inhibitor stock solution S2.

[0049] Take 0.8g of the prepared composite scale and corrosion inhibitor stock solution S2 and add it to 10L of test water 2 or 10L of test water 3, so that the concentration of carboxymethyl inulin, γ-cyclodextrin, polyaspartic acid and zinc ions in the water The effective concentrations are 3mg / L, 18mg / L, 4.5mg / L and 1.5mg / L respectively, and then the calcium carbonate scale inhibition performance is measured according to the method in the test example.

[0050] Use sulfuric acid to adjust the pH value of the test water 2 to 7.8-8.3, then add the compound sca...

Embodiment 3

[0052] Weigh 1g of benzotriazole, dissolve it in 12g of polyaspartic acid (at 30°C, the limiting viscosity is 0.079dl / g), then add 80.0g of carboxymethyl inulin (the degree of substitution is 0.8) and Add 6.0g of β-cyclodextrin (purchased from Shandong Binzhou Zhiyuan Biotechnology Co., Ltd.), and then add 21g of water, and shake well to obtain the composite scale and corrosion inhibitor stock solution S3.

[0053] Take 1.2g of the prepared composite scale and corrosion inhibitor stock solution S3 and add it to 10L of test water 1, so that the effective concentration of carboxymethyl inulin, β-cyclodextrin, polyaspartic acid and benzotriazole in the water They are 16mg / L, 6mg / L, 6mg / L and 1mg / L respectively, and then the calcium carbonate scale inhibition performance and corrosion inhibition performance are measured according to the method in the test example.

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Abstract

The invention discloses a composite scale and corrosion inhibitor. The composite scale and corrosion inhibitor contains carboxymethylinulin, cyclodextrin and/or a cyclodextrin derivative, and polyaspartic acid and/or polyepoxysuccinic acid at a weight ratio of (12-100):(2-25):(5-25). The invention also discloses applications of the composite scale and corrosion inhibitor in circulated cooling water treatment. The composite scale and corrosion inhibitor possesses excellent corrosion and scale inhibition comprehensive performance; and when the composite scale and corrosion inhibitor is applied to circulated cooling water treatment, requirements of circulated cooling water on scale and corrosion inhibition are satisfied, and environmental problems caused by phosphorus-containing chemicals in phosphorus-containing circulated cooling water are avoided.

Description

technical field [0001] The invention relates to the fields of scale and corrosion inhibition and circulating water treatment, in particular to a 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 scaling and corrosion problems. In order to prevent system scaling and corrosion, the most convenient and effective method is to add corrosion and scale inhibitors to the circulating cooling water. However, during the use of cooling water, with the continuous circulation and concentration, the mineral content in the water will continue to increase, which will intensify the corrosion and scaling of pipes and equipment. Therefore, it is necessary to add corrosion and scale inhibitors to improve the quality of cooling water and ensure The equipment operates safely. These chemicals will eventually be released into the environment as waste. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
Inventor 郦和生秦会敏杨玉张化冰谢文州楼琼慧李博伟
Owner CHINA PETROLEUM & CHEM CORP
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