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Antifoaming agent for wastewater treatment and preparation method thereof

A technology for wastewater treatment and defoaming agent, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve the problems of long defoaming time, short foam suppression time, and small application range, and achieve excellent foam suppression. and the effect of defoaming properties

Inactive Publication Date: 2018-11-13
芜湖凌岳企业管理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the defoamer prepared by the prior art has the defects of short foam suppression time and long defoaming time, and the application range is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The invention provides a kind of preparation method of defoamer, and this preparation method comprises:

[0014] (1) Carry out emulsification reaction of modified silicone oil, fatty alcohol, glycerin stearate, nonylphenol polyoxyethylene ether, sodium lauryl sulfate, aluminum oxide, emulsifier and water to form mixture M1;

[0015] (2) heat treatment after mixing the mixture M1 and silicon dioxide to obtain a defoamer;

[0016] Wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and white carbon black, obtaining silicone paste after heating to reflux, and mixing said silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and dodecyl Sodium alkyl sulfonate is mixed, and the modified silicone oil is obtained after shearing and dispersing evenly; wherein, dimethyl silicone oil and white carbon black are mixed according to a mass ratio of 1:0.1-0.3, relative to 100 parts by weight of For silicone paste, the co...

Embodiment 1

[0025] (1) At 30°C, mix 1kg modified silicone oil, 300g fatty alcohol, 400g glycerin stearate, 160g nonylphenol polyoxyethylene ether, 100g sodium lauryl sulfate, 180g aluminum oxide, 30g polyvinylpyrrolidone Carry out emulsification reaction with 1.8kg water for 4h to form mixture M1;

[0026] (2) Add 60g of silicon dioxide to 1kg of mixture M1, heat and stir at 90°C for 40min to prepare defoamer A1 for waste water treatment; wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and Mix white carbon black, heat and reflux to obtain a silicone paste, mix the silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and sodium dodecylsulfonate, and shear and disperse evenly to obtain the modified Organic silicone oil; Wherein, dimethyl silicone oil and white carbon black are mixed according to the ratio of 1:0.1 according to mass ratio, relative to the silicone paste of 100g, the consumption of graphene oxide is 10g, and...

Embodiment 2

[0028] (1) At 25°C, mix 1kg modified silicone oil, 250g fatty alcohol, 300g glycerin stearate, 150g nonylphenol polyoxyethylene ether, 80g sodium lauryl sulfate, 150g aluminum oxide, 20g hexadecane Trimethylammonium bromide and 1.5kg water carry out emulsification reaction 6h to form mixture M1;

[0029] (3) Add 40 g of silicon dioxide to 1 kg of mixture M1, heat and stir at 80° C. for 60 min to prepare defoamer A2 for wastewater treatment. Wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and white carbon black, obtaining silicone paste after heating to reflux, and mixing said silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and dodecyl Sodium alkyl sulfonate is mixed, and the modified silicone oil is obtained after shearing and dispersing uniformly; wherein, dimethyl silicone oil and white carbon black are mixed according to a mass ratio of 1:0.3, and relative to 100g of silicone paste, the oxidized The ...

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PUM

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Abstract

The invention discloses an antifoaming agent for wastewater treatment and a preparation method thereof. The preparation method comprises adopting modified silicone oil, fatty alcohol, glycerin hard fatty acid ester, nonylphenol ethoxylate, dodecane sodium sulphate, alumina, emulsifier and water to have emulsion reaction to form a mixture M1; mixing the mixture M1 and silica and then conducting heat treatment to obtain the antifoaming agent. A preparation method of the modified silicone oil comprises mixing dimethicone and white carbon black, conducting heating and refluxing to obtain a siliconpaste, mixing the silicon paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and sodium dodecyl sulfate, shearing and dispersing evenly to obtain the modified silicone oil. The antifoaming agent is long in foam inhibition time and short in antifoaming time, and can be widely applied in the sewage treatment process.

Description

Technical field [0001] The present invention relates to the field of sewage treatment, specifically, to a defoaming agent for wastewater treatment and a preparation method thereof. Background technique [0002] During the sewage treatment process, because the sewage contains a large number of microorganisms, a large amount of foam will be produced. These foams are viscous and will drag a large amount of solid matter such as activated sludge into the floating foam layer of the aeration tank, preventing oxygen from entering the aeration tank. pool mixture, reducing oxygenation efficiency. The commonly used method to inhibit and remove sewage foam is to add sewage defoamer. The sewage defoamer is an additive that inhibits the generation of foam or eliminates already generated foam by reducing the surface tension of sewage. Currently, commonly used sewage defoamers are divided into three categories: mineral oil, silicone, and polyether. [0003] At present, the defoaming agent...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0404B01D19/0422
Inventor 吴丹丹
Owner 芜湖凌岳企业管理咨询有限公司
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