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Composite Scale and Corrosion Inhibitor and Its Application in Circulating Cooling Water Treatment

A technology of scale and corrosion inhibitors and scale and dispersants, which can be used in water/sludge/sewage treatment, scale removal and water softening, chemical instruments and methods, etc. problems, achieve good scale and corrosion inhibition performance, reduce adverse effects, and reduce the effect of usage

Active Publication Date: 2018-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no research on the corrosion inhibition performance of carboxymethyl inulin and the research on the application of carboxymethyl inulin in the treatment of circulating cooling water to form a composite corrosion and scale inhibitor compounded with other water treatment agents in the existing literature

Method used

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  • Composite Scale and Corrosion Inhibitor and Its Application in Circulating Cooling Water Treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 30.0g carboxymethyl inulin (degree of substitution is 1.0), 10.0g 2-phosphonic acid group-1,2,4 tricarboxylic butane (active substance content is 50% by weight) and 30.0g acrylic acid / acrylic acid hydroxyl Propyl ester / methyl acrylate copolymer (purchased from Luoyang Qianglong Industrial Co., Ltd. is the commodity of T-225, the active substance content is 30% by weight, and the limiting viscosity number is 0.078dl / g at 30°C), add 30.0g of water , and shake well to obtain the composite scale and corrosion inhibitor stock solution S1.

[0042] Take 1g of the prepared composite scale and corrosion inhibitor stock solution S1 and add it to 10L of test water 1, so that carboxymethyl inulin, 2-phosphonic acid-1,2,4 tricarboxylic butane and acrylic acid / acrylic acid hydroxyl The effective concentration of propyl ester / methyl acrylate copolymer is 6mg / L, 5mg / L and 9mg / L respectively, and then the calcium carbonate scale inhibition performance and corrosion inhibition per...

Embodiment 2

[0044] Weigh 3.14g of zinc chloride, dissolve in 40.0g of acrylic acid / 2-methyl-2'-acrylamido propane sulfonic acid copolymer (purchased from Luoyang Qianglong Industrial Co., Ltd. with the brand name ZF221MS, the active substance content is 30 % by weight, the limit viscosity number at 30°C is 0.074dl / g), then add 15.0g carboxymethyl inulin raw material (degree of substitution is 0.6) and 8.0g hydroxyethylidene diphosphonic acid (active substance content is 50% by weight ), then add 13.86g of water, and shake well to obtain the composite scale and corrosion inhibitor stock solution S2.

[0045] 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 carboxymethyl inulin, hydroxyethylidene diphosphonic acid, acrylic acid / 2-methyl-2 The effective concentrations of '-acrylamide propane sulfonic acid copolymer and zinc ions were 3mg / L, 4mg / L, 12mg / L and 1.5mg / L respectively, and then the...

Embodiment 3

[0048] Weigh 1g of benzotriazole, and dissolve it in 20g of acrylic acid / acrylamide / 2-methyl-2'-acrylamidopropanesulfonic acid copolymer (purchased from Luoyang Qianglong Industrial Co., Ltd. Active substance content is 30% by weight, and limit viscosity number is 0.079dl / g when 30 ℃), then add 80.0g carboxymethyl inulin (substitution degree is 0.8) and 6.0g hydroxy ethylidene diphosphonic acid (active substance content 50% by weight), then add 13g of water, and shake well to obtain the composite scale and corrosion inhibitor stock solution S3.

[0049] 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 carboxymethyl inulin, hydroxyethylidene diphosphonic acid, acrylic acid / acrylamide / 2-methyl-2'- The effective concentrations of acrylamido propane sulfonic acid copolymer and benzotriazole were 16mg / L, 3mg / L, 6mg / L and 1mg / L respectively, and then the calcium carbonate scale inhibition performance measu...

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Abstract

The invention discloses a composite scale and corrosion inhibitor. The composite scale and corrosion inhibitor contains carboxymethylinulin, organic phosphonic acid and / or its salt, and a carboxylic acid polymer scale inhibition dispersant. The composite scale and corrosion inhibitor has a weight ratio of carboxymethylinulin, organic phosphonic acid and / or its salt to the carboxylic acid polymer scale inhibition dispersant of (12-100): (4-15): (10-50). The invention also discloses a use of the composite scale and corrosion inhibitor in recirculated cooling water treatment. The composite scale and corrosion inhibitor has good scale and corrosion inhibition performances, can satisfy scale inhibition and corrosion inhibition requirements on the recirculated cooling water, reduces a phosphorus-containing agent use amount and reduces recirculated cooling water phosphorus-containing agent-caused influence on the environment.

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 industrial water, the usage of circulating cooling water accounts for 60-80% of the total. 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. At present, the formulations of corrosion and scale inhibitors commonly used in circulating cooling water treatment in China are mostly phosphine-based formulations. Organic phosphonic acids or their salts have good chemical stability, are not easily hydrolyzed, can withstand high temperatures, and have both corrosion inhibition and Dual function of anti-scali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C02F5/14
Inventor 秦会敏郦和生李博伟楼琼慧谢文州张化冰杨玉
Owner CHINA PETROLEUM & CHEM CORP