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Method for producing polyether-type defoaming agent

A production method and antifoaming agent technology, which is applied in the production field of polyether type antifoaming agent, can solve the problems such as running out of materials, achieve the effect of small temperature and pressure increase, good mixing effect, and prevent overheating

Inactive Publication Date: 2008-07-23
张国忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a production method of defoaming agent, the reaction process of this production method is easy to control, so it can solve the problem of running out of materials caused by water and power outages

Method used

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  • Method for producing polyether-type defoaming agent
  • Method for producing polyether-type defoaming agent
  • Method for producing polyether-type defoaming agent

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and a preferred specific embodiment, so as to help understand the content of the present invention.

[0024] The polyether-type defoamer of this embodiment also adopts a batch-type production process, using glycerin as an initiator, and under the action of alkali catalysis, it is formed by ring-opening polymerization with propylene oxide and ethylene oxide in a polymerization kettle , and then neutralized and decolorized.

[0025] In conjunction with Figure 2, its production process is described in detail as follows:

[0026] 1. Polymerization process

[0027] (1) Enter glycerin and potassium hydroxide in the polymerization kettle and set up the external circulation of the kettle: open the vacuum valve of the polymerization kettle 4 to evacuate, drop into the starting material glycerol 90kg of reaction in the kettle, add catalyst potassium hydroxide from the solid feed p...

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Abstract

The invention discloses a production method for polyether type defoaming agent, which comprises a polymerization process, a neutralization process and a decoloration process in sequence. The polymerization process is characterized in that: the inorganic base catalyst and the glycerol are added to the polymerization kettle, the material inside the kettle is drawn out and back by pump to the kettle for the circulation with the temperature controlled by the heat exchanger outside the kettle, the propylene oxide is continuously added to the polymerization kettle for the simultaneous circulation, feeding and reaction while the outside circulation; the ethylene oxide is added to the polymerization kettle after the reaction for the simultaneous circulation, feeding and reaction. The production method for polyether type defoaming agent has the advantages of easily controlled reaction process, and better production safety.

Description

technical field [0001] The invention relates to a production method of a defoamer, in particular to a production method of a polyether type defoamer. Background technique [0002] Antifoaming agent is a kind of chemical additive used to eliminate harmful foam in industrial production process, and polyether type antifoaming agent is one of them. Polyether type defoamer has the advantages of non-toxic, harmless, fast defoaming and long-lasting effect, so it is widely used in pharmaceutical, fermentation, sugar, papermaking, printing and dyeing, water treatment and other industries, and has irreplaceable characteristics of other defoamers. The advantages. [0003] The molecular structure of polyether defoamer is: [0004] [0005] Its average molecular weight is 2800-3800, where n and m are both positive integers. [0006] At present, the production of polyether-type defoamers adopts a batch-type production process. Glycerin is used as an initiator. Neutralized and decol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/06C07C41/30C07C41/02B01D19/00
Inventor 张国忠
Owner 张国忠
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