Modified organic silicon defoaming agent and preparation method thereof

Abstract

The invention relates to a modified organic silicon defoaming agent and a preparation method thereof. The modified organic silicon defoaming agent comprises the following components in parts by weight: 0.5-1% of fumed silica, 10-30% of dimethyl silicone oil, 5-25% of high-boiling silicone oil, 5-15% of an emulsifier, 2-5% of a thickener, 0.1-0.5% of a stabilizer and 40-80% of deionized water. According to the invention, the production cost of the produced modified organic silicon defoaming agent is reduced and the stability and the use effect of the produced defoaming agent are improved by adjusting the type and the addition amount of the fumed silica (white carbon black) and the types and the addition modes of additives. Impurities such as nitrogen and phosphorus are not introduced; and meanwhile, water body foam is reduced, and a long-term foam inhibition effect is provided. Meanwhile, the solid content of the produced defoaming agent is high, and transportation and use of the defoaming agent are facilitated.

Description

technical field [0001] The invention relates to a modified organosilicon defoamer and a preparation method thereof, which is mainly used for defoaming liquids in industrial production, and can also be used for defoaming liquids such as sewage. While impurities such as nitrogen and phosphorus are not introduced, Reduce water foam and provide long-term anti-foam effect. Background technique [0002] Silicone defoamer can not only remove the foam on the liquid surface of the process medium in the production process, but also inhibit the generation of water foam, thereby improving the separation, gasification, effects such as drainage. In the actual production process, it is necessary to further reduce costs and improve production efficiency to increase the competitiveness of products. Increasing the solid content of the agent can increase the concentration of the agent and reduce the cost of transportation and use, but the production cost increases, the stability is poor, and...

AI Technical Summary

Problems solved by technology

Increasing the solid content of the agent can increase the concentration of the agent and reduce the cost of transportation and use, but the production cost increases, the stability is poor, and obvious stratification is prone to occur, and the liquid on the surface of the defoamer is more likely to oxidize and deteriorate, which reduces the product’s durability. Defoaming and antifoaming properties

[0003] CN 104225965 A provides an organosilicon defoamer and its preparation method. The preparation process of the invention takes a long time and consumes a lot of energy, and the prepared product will have emulsion delamination and color change in the actual application process. Phenomena such as red becoming darker have an impact on its application

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