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Preparation method of modified silane defoaming agent for papermaking wastewater

A technology for papermaking wastewater and defoaming agent, applied in the field of silicone defoaming agent, can solve the problems of reducing defoaming efficiency or foam suppressing effect, etc., to improve emulsion stability, improve dispersibility and defoaming performance, and improve defoaming. The effect of efficiency

Pending Publication Date: 2022-03-18
杭州撒拉弗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the defoamers in the prior art are based on silicone, and polyether segments are introduced to further increase compatibility, but the defoaming efficiency or antifoaming effect is reduced

Method used

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  • Preparation method of modified silane defoaming agent for papermaking wastewater

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Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment relates to a modified silane paper wastewater foaming agent, and the preparation method thereof includes the following steps:

[0032] S1, respectively weigh the polyether modified organosiloxane and dispersant and mix, stir up to 100-150 ° C, stirring is stirred for 1-2 h, to be cooled to 70 ° C or less, add a composite emulsifier and thickener and mix , Then add water for stirring emulsification, and then cool after deposition to obtain the first emulsion;

[0033] Among them, the polyether modified organosiloxane with the dispersing agent, the composite emulsifier, the thickener, the mass ratio of the water of 40: 9: 11: 1.4: 55;

[0034] S2, respectively, called polysiloxane and dispersing agent, mix, stir up to 160-200 ° C, stir for 1-2 h, to cool to 70 ° C, add composite emulsifier and thickener and mix, add water The mixture is stirred, and the second emulsion is obtained after cooling.

[0035] Among them, the polysiloxane with the dispersing agent, ...

Embodiment 2

[0051] This embodiment relates to a modified silane paper wastewater foamer, and the preparation method is the same as in Example 1, and the difference is that the mixed mass ratio of the first emulsion and the second emulsion is 3: 1.

Embodiment 3

[0053] This embodiment relates to a modified silane paper wastewater foaming agent, and the method of preparing the same example in Example 1 is that the polyether modified organosiloxane is a mass ratio 25: 0 dual-end polyether modification Mixtures of silicone oil and silicone blocking polyclyoxane prepolymer.

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Abstract

The invention provides a preparation method of a modified silane papermaking wastewater defoaming agent, and belongs to the field of organic silicon defoaming agents, the defoaming agent comprises polyether modified organosiloxane, polysiloxane, a dispersing agent, a compound emulsifier, a thickening agent and water, the polyether modified organosiloxane and the polysiloxane are respectively used for preparing emulsions and then are mixed to obtain the defoaming agent, and the defoaming agent is prepared from the polyether modified organosiloxane, the polysiloxane, the dispersing agent, the compound emulsifier, the thickening agent and the water. The polyether modified organosiloxane comprises a siloxane-terminated polypropylene oxide prepolymer with the weight-average molecular weight of 12000 and single-ended or double-ended polyether modified silicone oil, and polymeric monomers of a polyether-terminated segment are ethylene oxide and propylene oxide; aiming at the solution characteristics of papermaking wastewater, the siloxane-terminated polypropylene oxide prepolymer is added on the basis of polyether modified organosiloxane, so that the defoaming efficiency of the defoaming agent is improved.

Description

Technical field [0001] The present invention relates to the field of silicone defoaming agents, and more particularly to a method of preparing a modified silane paper wastewater diffuser. Background technique [0002] In most industrial production, a large number of bubbles will cause trouble, such as affecting production efficiency, causing equipment damage, and even causing production. For example, in the pulp and papermaking process step, the natural fatty substances, like pulp and resin acids contained in the feedstock, with the addition of caustic soda, sodium sulfide and other chemicals react to generate a fatty acid soap, a resin acid soap foaming substances, The raw material contains a high molecular material such as cellulose has a steady effect, so that the slurry produces a large amount of stable foam during the flow and mixing, bringing a lot of difficulties to subsequent washing, delivery, bleaching, etc., and causes floating. And the mass of the pulp is lowered, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C02F1/20C02F103/28
CPCB01D19/0409C02F1/20C02F2103/28
Inventor 门全陈万钧计洪波
Owner 杭州撒拉弗科技有限公司
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