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Non-phosphorus corrosion and scale inhibitor for industrial cooling water system as well as preparation method and application thereof

A cooling water system, phosphorus-free corrosion inhibition technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problem of few applications, achieve good results, and adapt to a wide range of water quality , The effect of reducing subsequent processing costs

Active Publication Date: 2015-04-08
天津沃川水处理工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of citric acid and its salts as metal protective film treatment fluid additives is still less

Method used

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  • Non-phosphorus corrosion and scale inhibitor for industrial cooling water system as well as preparation method and application thereof
  • Non-phosphorus corrosion and scale inhibitor for industrial cooling water system as well as preparation method and application thereof
  • Non-phosphorus corrosion and scale inhibitor for industrial cooling water system as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0018] The preparation method of the itaconic acid-diethylene glycol ester-acrylic acid terpolymer comprises the following steps: in parts by weight, (1) 20-25 parts of itaconic acid, 0.2-0.5 part of diethylene glycol Ethylene glycol, 15-20 parts of mass percent concentration 40% NaOH solution and 10-15 parts of water are added to the reactor, stirred and dissolved; (2) 2-5 parts of mass percent concentration of 50% acrylic acid aqueous solution, as a A kind of dripping or feeding liquid; 5-15 parts of ammonium persulfate aqueous solution with a mass percentage concentration of 20% is used as another dropping or feeding liquid, and the two kinds of dropping or feeding liquid are continuously added to the above reaction at the same time (3) Control the reaction temperature to 95-105°C, drop or feed liquid reaction time is 1-1.5 hours, follow-up reaction time is 0.5-1 hour, after cooling, use mass percentage concentration 40 % NaOH solution to adjust the pH to be weakly acidic, ...

Embodiment 1

[0031] The synthesis of embodiment 1 itaconic acid-diethylene glycol ester-acrylic acid terpolymer

[0032] In parts by weight, (1) 20-25 parts of itaconic acid, 0.2-0.5 parts of diethylene glycol, 15-20 parts of 40% NaOH solution and 10-15 parts of water are added to the reactor (2) 2-5 parts of 50% mass percentage concentration of acrylic acid aqueous solution as a kind of dripping or feeding solution; 5-15 parts of 20% mass percentage concentration of ammonium persulfate aqueous solution as Another kind of dripping or feeding liquid, two kinds of dropping or feeding liquids are continuously added to the above reactor at the same time to carry out polymerization reaction; The time is 1-1.5 hours, and the subsequent reaction time is 0.5-1 hours. After cooling, adjust pH to weak acidity with 40% NaOH solution in mass percentage concentration, and obtain brown red or sauce brown transparent viscous liquid which is itaconic acid-diethylene glycol ester-acrylic acid terpolymer. ...

Embodiment 2

[0033] The configuration of embodiment 2 zinc citrate mixture

[0034] The required raw materials for the zinc citrate salt mixture are composed according to the following molar ratio: the molar ratio between zinc ions and citrate ligands is 1:1 to 1:2. Zinc ions are introduced into the composition in the form of zinc citrate trihydrate, and citrate is introduced in the composition in the form of citric acid or potassium citrate or sodium citrate or ammonium citrate. The materials were taken according to the following composition mass percentages, 62% of zinc citrate trihydrate and 38% of citric acid, to obtain a mixture of zinc citrate.

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Abstract

The invention discloses a non-phosphorus corrosion and scale inhibitor for an industrial cooling water system as well as a preparation method and application thereof. The non-phosphorus corrosion and scale inhibitor is composed of an itaconic acid-diethylene glycol ether-acrylic acid terpolymer, Polyepoxysuccinic Acid (PESA), zinc citrate, Benzotriazole (BTA) and water, wherein the weight percentage of the itaconic acid-diethylene glycol ether-acrylic acid terpolyme in the non-phosphorus corrosion and scale inhibitor is 15.0%-40.0%, the weight percentage of the PESA in the non-phosphorus corrosion and scale inhibitor is 5.0%-20.0%, the weight percentage of the zinc citrate in the non-phosphorus corrosion and scale inhibitor is 5.0%-12.0%, and the weight percentage of the BTA in the non-phosphorus corrosion and scale inhibitor is 0.5%-0.8%, and the balance of water. Wastewater discharged after the use of the non-phosphorus corrosion and scale inhibitor does not cause phosphorus-induced eutrophication pollution to water, and is environment-friendly; the dosage of the non-phosphorus corrosion and scale inhibitor for treating water per ton is 3-10mg / L; the non-phosphorus corrosion and scale inhibitor is stable in performance and widely applied to different water qualities.

Description

technical field [0001] The invention relates to a phosphorus-free corrosion and scale inhibitor and a preparation method thereof, in particular to a phosphorus-free and biodegradable environment-friendly corrosion and scale inhibitor suitable for industrial circulating cooling water treatment systems, a preparation method and application thereof. Background technique [0002] In the industrial 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 water. At present, most of the formulas commonly used in the treatment of circulating cooling water in China are phosphine-based formulas. The pollution of phosphine-containing compounds to water bodies and the resulting eutrophication have made people gradually realize the importance of controlling their discharge. Environmental protection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12
Inventor 王传军孙振宏胡廷育马红刚
Owner 天津沃川水处理工程技术有限公司
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