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Environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and preparation method thereof

An environmentally friendly technology for cooling circulating water, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve problems such as application limitations, general corrosion and scale inhibition effects, etc., to achieve Low cost, significant effect, and small amount of addition

Active Publication Date: 2014-03-05
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When hydrolyzed polymaleic anhydride (HPMA) is used alone, the corrosion and scale inhibition effect is average; although benzotriazole (BTA) has better corrosion inhibition performance, its application is sometimes limited

Method used

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  • Environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and preparation method thereof
  • Environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and preparation method thereof
  • Environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] It is roughly PEG1000-polyamino acid 3000, where 1000 and 3000 in PEG1000 and polyamino acid 3000 represent molecular weight, and the following examples are the same

[0024] (1) Add 1g of amino functionalized polyethylene glycol (PEG-NH 2 ) (molecular weight 1000) was dissolved in 20 mL of dioxane, added 5 g of aspartic acid-benzyl ester N-carboxylic anhydride, 5 g of glutamic acid-benzyl ester N-carboxylic anhydride, N 2 Polymerize at 60°C for 12 hours under protection, pour the above reaction system into excess absolute ethanol to precipitate the product, that is, polyethylene glycol-polybenzyl aspartate-polybenzyl glutamate terpolymer (hereinafter referred to as Polymer a1).

[0025] (2) Add 2 mol / L sodium hydroxide solution dropwise into the saturated chloroform solution of polymer a1 at room temperature, and heat at 40°C for 2 h until no precipitation occurs, and then remove the solvent under vacuum to obtain The mixture was cooled to 4°C, titrated with 0.1mol / L...

Embodiment 2

[0027] Roughly PEG1000-polyamino acid 5000

[0028] (1) Add 1g of amino functionalized polyethylene glycol (PEG-NH 2 ) (molecular weight 1000) was dissolved in 30 mL of dioxane, added 10 g of aspartic acid-benzyl ester N-carboxylic anhydride, 5 g of glutamic acid-benzyl ester N-carboxylic anhydride, N 2 Polymerize at 60°C for 12 hours under protection, pour the above reaction system into excess absolute ethanol to precipitate the product, that is, polyethylene glycol-polybenzyl aspartate-polybenzyl glutamate terpolymer (hereinafter referred to as Polymer a2).

[0029] (2) Same as Example 1 to obtain polymer b2.

Embodiment 3

[0031] Roughly PEG2000-polyamino acid 5000

[0032] (1) Add 2g of amino functionalized polyethylene glycol (PEG-NH 2 ) (molecular weight 2000) was dissolved in 35 mL of dioxane, added 5 g of aspartic acid-benzyl ester N-carboxylic anhydride, 10 g of glutamic acid-benzyl ester N-carboxylic anhydride, N 2 Polymerize at 60°C for 12 hours under protection, pour the above reaction system into excess absolute ethanol to precipitate the product, that is, polyethylene glycol-polybenzyl aspartate-polybenzyl glutamate terpolymer (hereinafter referred to as Polymer a3).

[0033] (2) Same as Example 1 to obtain polymer b3.

[0034] Preparation example of composite slow-release scale inhibitor of the present invention, wherein the molecular weight of HPMA is 500-1000

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Abstract

The invention belongs to the technical field of water treatment of an industrial circulating water cooling system, and particularly discloses an environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and a preparation method thereof. The composite corrosion-inhibition antisludging agent consists of a component A, a component B, a component C and water, wherein the component A is polyethylene glycol-polyaspartic acid-polyglutamic acid ternary copolymer, the component B is hydrolytic polymaleic anhydride, and the component C is benzotriazole. The components A, B and C are dissolved in the water according to the ratio to produce a finished product. The corrosion-inhibition antisludging agent is good in corrosion-inhibiting effect on A3 carbon steel, red copper and stainless steel, the antisludging rate is high, the application requirement of the circulating cooling water can be met, and the biodegradability is good.

Description

technical field [0001] The invention belongs to the technical field of water treatment of industrial circulating water cooling systems, and in particular relates to an environment-friendly composite corrosion and scale inhibitor for cooling circulating water systems and a preparation method thereof. Background technique [0002] In recent years, with the increasing awareness of environmental protection and stricter environmental regulations, people have put forward higher and higher requirements for water treatment agents. At present, organic phosphate copolymers are the most widely used corrosion and scale inhibitors at home and abroad, but the discharge of phosphorus in this type of corrosion and scale inhibitors will lead to eutrophication of water sources and red tides, which will have a very serious impact on the ecological environment. big impact. Therefore, the research and development of low-phosphorus and phosphorus-free corrosion and scale inhibitors will surely b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 陈燕敏孙彩霞程玉山徐会武陈敏薛冕黄长山吴晋英肖菊
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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