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Waste water anti-foaming agent and preparing method thereof

A defoamer and waste water technology, applied in the direction of degassed water/sewage treatment, etc., can solve the problems of long defoaming time, short foam suppression time, small application range, etc., and achieve the effect of excellent foam suppression and defoaming performance

Inactive Publication Date: 2015-11-11
ANHUI JIANGWEI PRECISION IND
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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) Polyglycerol, benzyltriphenylphosphine bromide, amide, nonylphenol polyoxyethylene ether, sodium bromide, potassium iodide, emulsifier and water are subjected to an emulsification reaction to form a mixture M1;

[0015] (2) heat-treating the mixture M1 and silicon dioxide to obtain a waste water defoamer;

[0016] Wherein, the amide is selected from one or more of ethylene bis-lauramide, methylene bis-oleamide, ethylene bis-myristamide and butylene bis-stearamide.

[0017] In the above-mentioned preparation method, the degree of polymerization of polyglycerol is not particularly limited. In order to make the prepared waste water defoamer have more excellent foam suppression and defoaming performance, preferably, the degree of polymerization of polyglycerol is 3-6.

[0018] Similarly, the weight-average molecular weight of nonylphenol polyoxyethylene eth...

Embodiment 1

[0027] (1) At 30°C, mix 1kg polyglycerol (polymerization degree 4), 300g benzyltriphenylphosphine bromide, 400g ethylene bislauric amide, 160g nonylphenol polyoxyethylene ether (weight average molecular weight 13000), 100g sodium bromide, 180g potassium iodide, 30g polyvinylpyrrolidone and 1.8kg water were emulsified for 4h to form mixture M1;

[0028] (2) Add 60 g of silicon dioxide to 1 kg of mixture M1, heat and stir at 90° C. for 40 min to prepare waste water defoamer A1.

Embodiment 2

[0030] (1) At 25°C, mix 1kg polyglycerol (polymerization degree 3), 250g benzyltriphenylphosphine bromide, 300g methylenebisoleic acid amine, 150g nonylphenol polyoxyethylene ether (weight average Molecular weight is 12000), 80g sodium bromide, 150g potassium iodide, 20g hexadecyltrimethylammonium bromide and 1.5kg water carry out emulsification reaction 6h to form mixture M1;

[0031] (3) Add 40 g of silicon dioxide to 1 kg of mixture M1, heat and stir at 80° C. for 60 min to prepare waste water defoamer A2.

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PUM

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Abstract

The invention discloses a waste water anti-foaming agent and a preparing method thereof. The preparing method includes the steps that firstly, polyglycerol, benzyl triphenyl phosphorous bromide, amide, nonylphenol polyoxyethylene ether, sodium bromide, potassium iodide, emulsifier and water are used for conducting an emulsion reaction to form a mixture M1; secondly, heat treatment is conducted on the mixture M1 and silicon dioxide, and the waste water anti-foaming agent is prepared. The amide is selected from one or more of ethylene bis-dodecylamide, methylenebis oleic acid amine, methylenebis netmeg amide and methylenebis stearamide. The waste water anti-foaming agent prepared through the method is long in foam inhibition time, short in anti-foaming time and capable of being applied to the sewage treatment process with a large range.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a waste water defoamer and a preparation method thereof. Background technique [0002] In the process of sewage treatment, because the sewage contains a large number of microorganisms, a large number of foams will be produced. These foams are viscous and will involve a large amount of solid substances such as activated sludge into the floating foam layer of the aeration tank, hindering oxygen from entering the aeration. Pool mixture, reducing oxygenation efficiency. The commonly used method of suppressing and removing foam in sewage is mainly to add sewage defoamer, which is an additive that suppresses foam generation or eliminates foam that has already occurred by reducing the surface tension of sewage. Currently commonly used sewage defoamers are divided into three categories: mineral oils, silicones, and polyethers. [0003] At present, the defoamers prepared in the prior art...

Claims

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Application Information

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IPC IPC(8): C02F1/20
Inventor 江豪沈福建鲍启兵褚诗泉
Owner ANHUI JIANGWEI PRECISION IND
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