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For defoaming of nonaqueous systems

Apr 20, 2017

Type silicone oil is directly used asdefoamers, ointment type silicone oil is added to silica dubbed ointment form defoamers,mainly for anti-foaming non-aqueous systems.

Silicone oils of different viscosities, thesame mineral oil foaming system showed different anti-foaming effect. Those whohave low viscosity and good defoaming dispersion, but the suppression of persistentlack of bubbles. High viscosity by breaking foam relatively slow, butpersistent good suds.

In practice, in order to take into accountthe above-breaking foam and persistent, you can take the high, low viscositydimethicone two kinds of use after blending.

Dimethicone more as oil, transmission oilwithin the add defoamer defoamers, and crude oil exploration, refining, heavyoil cracking process and other processes. Silicone anti-foaming effect dependson the degree of dispersion in the foaming system. Silicone particles dispersedonly to 100μm or less anti-foaming effect. To 20μm or less dispersion wasstable. In order to improve the degree of dispersion by means of mechanicalagitation, such as high-speed high-speed stirring under heating, or pre-formulatedwith a colloid mill one silicone oil - mineral uniformly dispersed liquidsilicone oil as defoamers. Other additives may also be by means of a mineraloil of surface activity. Such as silicone oil previously mixed with detergentor rust inhibitors added together after mineral oil. And advance with siliconepaste dubbed silica defoamer by means of silica dispersion to use.

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