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Self-emulsifying type antifoaming agent and preparation method thereof

A self-emulsifying, defoaming agent technology, applied in the direction of foam dispersion/prevention, can solve the problems of slow and incomplete defoaming, low foam breaking rate of polyether defoaming agents, etc., achieve good foam suppression effect and promote dispersion The effect of good stability and good dispersion stability

Active Publication Date: 2018-01-05
JIAHUA CHEM MAOMING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the low foam breaking rate and slow and incomplete defoaming of polyether defoamers when polyether defoamers are used in the restricted field of silicone defoamers in the prior art. problem; provide a self-emulsifying defoamer with good dispersion stability, high defoaming efficiency and strong foam suppression ability in the defoaming system

Method used

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  • Self-emulsifying type antifoaming agent and preparation method thereof
  • Self-emulsifying type antifoaming agent and preparation method thereof
  • Self-emulsifying type antifoaming agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] The invention provides a kind of preparation method of self-emulsifying type defoamer, specifically comprises the following steps:

[0031] (1) Add 186g C in a 2.0L pressure reactor 12 Alcohol and 0.42g KOH, replace the air in the reaction kettle with nitrogen, heat up and dehydrate, when the temperature of the kettle rises to 100°C, start feeding 132g of ethylene oxide, keep the polymerization reaction temperature at 100°C, and keep the reaction pressure at 0.1Mpa, until the ethylene oxide is fully matured.

[0032] (2) After the aging reaction of ethylene oxide is complete, lower the temperature, add a small amount of water, phosphoric acid and 1.68g of magnesium silicate, then stir and mix, and filter the mixture after dehydration to obtain C 12 alcohol polyoxyethylene ether.

[0033] (3) Then in C 12 Add 0.2g of DMC catalyst (Zn-Co bimetallic catalyst) to the alcohol polyoxyethylene ether, raise the temperature to 120°C, start feeding 928g of propylene oxide, keep ...

Embodiment 2

[0035] The invention provides a kind of preparation method of self-emulsifying type defoamer, specifically comprises the following steps:

[0036] (1) Add 200g C in a 2.0L pressure reactor 12 ~C 14 Alcohol and 1.58g KOH, replace the air in the reaction kettle with nitrogen, heat up and dehydrate, when the temperature of the kettle rises to 110-120°C, start feeding 220g of ethylene oxide and 1160g of propylene oxide, and keep the polymerization reaction temperature at 130-140°C °C, the reaction pressure is kept at 0.1-0.4Mpa until the ethylene oxide and propylene oxide are fully matured.

[0037] (2) After the aging reaction of ethylene oxide and propylene oxide is complete, cool down, add a small amount of water, phosphoric acid, 2.1g magnesium silicate and 1.5g aluminum silicate, then stir and mix, filter the mixture after dehydration, and obtain C 12 ~C 14 Alcohol polyoxyethylene polyoxypropylene ether.

Embodiment 3

[0039] The invention provides a kind of preparation method of self-emulsifying type defoamer, specifically comprises the following steps:

[0040] (1) Add 200g iso-C to a 2.0L pressure reactor 13 Alcohol and 0.79g KOH, replace the air in the reaction kettle with nitrogen, heat up and dehydrate, when the temperature of the kettle rises to 110-120°C, start feeding 330g of ethylene oxide, keep the polymerization reaction temperature at 120-130°C, and keep the reaction pressure At 0.1 ~ 0.4Mpa, until the ethylene oxide is fully matured.

[0041] (2) After the ethylene oxide aging reaction is complete, lower the temperature, add a small amount of water, phosphoric acid and 2.65g of aluminum silicate, then stir and mix, dehydrate the mixture and filter to obtain iso-C 13 alcohol polyoxyethylene ether.

[0042] (3) Then in iso-C 13 Add 0.75g of DMC catalyst (Zn-Co bimetallic catalyst) to the alcohol polyoxyethylene ether, raise the temperature to 110-120°C, start feeding 1670g of ...

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Abstract

The invention provides a self-emulsifying type antifoaming agent. The self-emulsifying type antifoaming agent comprises the following raw materials: C12-C18 alcohol, ethylene oxide and epoxypropane. The self-emulsifying type antifoaming agent has the advantages of good dispersion stability, good foam inhibiting capability, high defoaming efficiency, and lasting action time. The invention also provides a preparation method of the self-emulsifying type antifoaming agent, and the method comprises the following steps: C12-C18 alcohol and a catalyst are mixed under an anoxic environment, and ethylene oxide and epoxypropane are added; a polymerization is carried out for C12-C18 alcohol as well as ethylene oxide and epoxypropane, and the self-emulsifying type antifoaming agent is prepared. The preparation method of the self-emulsifying type antifoaming agent has simple operation and mild conditions, is suitable for large scale industrial production, and can be used for preparing the self-emulsifying type antifoaming agent with high defoaming and foam inhibiting performance.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a self-emulsifying defoamer and a preparation method thereof. Background technique [0002] Defoamer has the function of eliminating foam and inhibiting foam generation. In the process of industrial production, as long as it involves stirring, there will be foam problems. The large amount of foam will seriously affect the normal production, resulting in a series of problems such as severely limited production capacity, waste of raw materials, prolonged reaction cycle and reduced product quality. . Elimination of harmful foam can take advantage of standing, decompression (vacuumizing), heating or pressurization and other methods. But when it is necessary to eliminate foam quickly and effectively in a short period of time, it is necessary to add a defoamer. Therefore, defoamers are widely used in petrochemical, industrial cleaning, papermaking, sewage treat...

Claims

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Application Information

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IPC IPC(8): B01D19/04C08G65/28
Inventor 刘媛何新耀李玉博
Owner JIAHUA CHEM MAOMING
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