Preparation and application of paint waste water treatment agents

A waste water treatment agent and paint technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of polluting the surrounding air and environment, the paint cannot be completely removed, and the paint is sticky. and other problems, to achieve the effect of fast and effective anti-sticking, improving the coating operation environment and convenient operation.

Inactive Publication Date: 2012-02-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of modern coating technology, the amount of paint is increasing day by day. Usually, a large part of the paint cannot be painted on the workpiece and becomes overspray, which seriously pollutes the surrounding air and environment.
The current method for cleaning overspray paint is mainly mechanical scraping method. Due to the high viscosity of the paint, the paint cannot be completely removed, and the treatment efficiency of this method is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 250ml of water into a 500ml beaker, heat the water bath to 80°C, add the three organic compounds of aniline, urea and starch to formaldehyde in a mass ratio of 1:1:1:5 into the water, stir to fully dissolve it. Then add 5ml of hydrochloric acid, adjust the pH value of the reaction system to 2, react for 2 hours and then cool to 40°C and age for 2 hours. The resulting solution, 6501 non-ionic surfactant and organic bentonite are in a mass ratio of 5:1:1 Detackifier A is obtained by compounding.

[0017] The mass fraction of 1% sodium lignosulfonate aqueous solution, the mass fraction of 0.5% chitosan aqueous solution and the mass fraction of 0.1% cationic polyacrylamide aqueous solution are reacted at a mass ratio of 1:1:8, and the reaction temperature is 60°C. The reaction time is 60 minutes. The solution obtained by the reaction is compounded with a 1% sodium alginate aqueous solution in a mass ratio of 5:1 to obtain the coagulant B.

[0018] Take 3ml of the detackifi...

Embodiment 2

[0020] Add 200ml of water to a 500ml beaker, heat the water bath to 85°C, add the three organic compounds of aniline, urea and starch to formaldehyde in a mass ratio of 2:1:1:6 into the water, stir to fully dissolve it. Then add 5ml hydrochloric acid, adjust the pH value of the reaction system to 4, react for 1 hour and then cool to 45°C and age for 2 hours. The resulting solution, 6501 nonionic surfactant and organic bentonite are in a mass ratio of 6:1:1 Detackifier A is obtained by compounding.

[0021] The mass fraction of 2% sodium lignosulfonate aqueous solution, the mass fraction of 0.6% chitosan aqueous solution and the mass fraction of 0.5% cationic polyacrylamide aqueous solution are reacted at a mass ratio of 1:1:10, and the reaction temperature is 50°C, The reaction time is 70 minutes. The solution obtained by the reaction is mixed with a 2% sodium alginate aqueous solution in a mass ratio of 6:1 to obtain the coagulant B.

[0022] Take 3ml of the detackifier A prepar...

Embodiment 3

[0024] Add 300ml of water to a 500ml beaker, heat the water bath to 90°C, add the three organic compounds of aniline, urea and starch to formaldehyde in a mass ratio of 3:1:1:7 into the water, stir to fully dissolve it. Then add 5ml of hydrochloric acid, adjust the pH of the reaction system to 4, react for 3 hours and then cool to 50°C and age for 2 hours. The resulting solution, 6501 nonionic surfactant and organic bentonite have a mass ratio of 7:1:1 Detackifier A is obtained by compounding.

[0025] The mass fraction of 3% sodium lignosulfonate aqueous solution, 0.8% mass fraction of chitosan aqueous solution and 0.8% mass fraction of cationic polyacrylamide aqueous solution are reacted at a mass ratio of 1:1:12, and the reaction temperature is 40°C. The reaction time is 80 minutes. The solution obtained by the reaction is mixed with a 3% sodium alginate aqueous solution in a mass ratio of 7:1 to obtain the coagulant B.

[0026] Take 3ml of the detackifier A prepared above and...

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PUM

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Abstract

The invention relates to preparation and an application of paint waste water treatment agents. The paint waste water treatment agents comprise viscosity reducing agent A and flocculants B, wherein the viscosity reducing agent A is aqueous solution, is formed by compounding organic bentonite, 6501 nonionic surface active agents and high-molecular polymers prepared from formaldehyde and three kinds of organic compounds: aniline, urea and starch through reaction, has high electric neutrality and can fast neutralize paint particle charges, so dope loses the viscosity. The flocculants B is aqueous solution, is formed by compounding sodium alginate aqueous solution, sodium lignosulphonate aqueous solution and chitosan modified cation polyacrylamide aqueous solution with the molecular weight being 8 to 12 million, has high coacervation effect and can gather paint particles losing the viscosity. The paint waste water treatment agents have good viscosity reduction and coacervation effects on water-soluble and fat-soluble dope. When the paint flocculants are applied to paint spraying waste water treatment, the agent A and the agent B are sequentially added into paint-containing circulating water, more than 90 percent of paint in the waste water can be cleaned.

Description

Technical field [0001] The invention belongs to the field of industrial wastewater treatment, and relates to the application of a paint wastewater treatment agent in paint spraying wastewater. Background technique [0002] With the development of modern coating technology, the amount of paint is increasing. Usually a large part of the paint cannot be applied to the workpiece and becomes overspray, which seriously pollutes the surrounding air and environment. The current method used to clean up spray paint is mainly mechanical scraping method. Due to the high viscosity of the paint, the paint cannot be completely removed, and this method has low processing efficiency. Therefore, paint waste water treatment agents are often used in wet paint treatment equipment, which can effectively eliminate the paint adhering to the equipment pipes and the inside of the pump body, prevent water and air passages from being blocked, and the treated paint residue is not sticky or smelly. The paint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 曾德芳涂仁杰
Owner WUHAN UNIV OF TECH
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