Compound-type de-foaming agent and preparation method thereof

A defoamer and composite technology, applied in the direction of foam dispersion/prevention, can solve the problems of high foam viscosity, difficult to eliminate, difficult to suppress foam, difficult to defoamer, etc., to achieve rapid defoaming and foam suppression, reduce surface The effect of tension

Inactive Publication Date: 2014-09-03
吴朝东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the water treatment industry, some manufacturing industries, such as papermaking, sugar, leather, etc., contain a large amount of foam in their waste water. Due to the production of special chemical reactions, some foams in waste water have high viscosity and fine foam, which are difficult to eliminate. In some wastewater, the surfactant contained in it may even help foam, and it is difficult to suppress and defoam. Therefore, it is necessary to use a compound defoamer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 A composite defoamer prepared by using the following raw materials in mass percentage: 5% trifluoropropyl modified silicon polyether, hydrosilylation of low hydrogen-containing silicone oil and terminal allyl polyoxyalkylene ether 45% of polyether modified siloxane, 30% of silicone oil, 12% of polyethylene glycol, 5% of fatty alcohol and 3% of triglyceride were synthesized by reaction.

[0018] The following steps are used to prepare: first mix the modified silicon polyether, polyether modified siloxane, and triglyceride, fully dissolve, stir evenly, then add polyethylene glycol, fatty alcohol, mix and stir, and finally add emulsifier and stir Evenly.

Embodiment 2

[0019] Example 2 A composite defoamer prepared by using the following raw materials in mass percentage: 14% trifluoropropyl modified silicon polyether, hydrosilylation of low hydrogen-containing silicone oil and terminal allyl polyoxyalkylene ether 70% of polyether-modified siloxane, 3% of silicone oil, 10% of polyethylene glycol, 1% of fatty alcohol, and 2% of triglyceride were synthesized by reaction.

Embodiment 3

[0020] Example 3 A composite defoamer prepared by using the following raw materials in mass percentage: 1% trifluoropropyl modified silicon polyether, hydrosilylation of low hydrogen-containing silicone oil and terminal allyl polyoxyalkylene ether 55% of polyether modified siloxane, 20% of silicone oil, 10% of polyethylene glycol, 8% of fatty alcohol, and 6% of triglyceride were synthesized by reaction.

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PUM

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Abstract

The invention discloses a compound-type de-foaming agent. The compound-type de-foaming agent comprises the following raw materials in percentage by mass: 1-20 percent of modified silicon polyether, 5-70 percent of polyether modified siloxane, 3-50 percent of an emulsifying agent, 10-20 percent of polyethylene glycol, 1-10 percent of fatty alcohol and 2-15 percent of triglyceride. The compound-type de-foaming agent has the advantages of stable performance, high de-foaming speed and long foam inhibition time, does not poison sewage microorganisms, does not change the COD (chemical oxygen demand) and BOD (biochemical oxygen demand) of sewage, and is applicable to wastewater treatment of enterprises of papermaking, printing-dyeing, sugar refinery, pharmacy and leather.

Description

technical field [0001] The invention relates to a defoamer, in particular to a composite defoamer, which belongs to the technical field of fine chemicals. Background technique [0002] Many harmful foams produced in the process of industrial production will cause overflow of raw materials, greatly restrict the production capacity of equipment, cause waste of raw materials and products, prolong the reaction cycle, affect product quality, pollute the environment, cause accidents and other hazards, therefore, In the process of industrial production, defoamers need to be added. [0003] As far as the current defoamers are concerned, polyether-based and silicone-based defoamers have the best performance, and research on the modification and development of new varieties of these two types of defoamers is also active. The latest type of defoamer is silicone ether copolymer. This kind of defoamer has fast defoaming, long foam suppression time, alkali and acid resistance, high tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 吴朝东
Owner 吴朝东
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