Commonly used defoamers can be divided into silicone (resin), surfactants, paraffins and mineral oils according to their components.


01
Silicon (resin)
Silicone resin defoamer, also known as emulsion type defoamer, is used by emulsifying and dispersing silicone resin in water with an emulsifier (surfactant) and then adding it to wastewater. Silica fine powder is another silicon defoamer with better defoaming effect.


02
Surfactants
This type of defoamer is actually an emulsifier, which uses the dispersing effect of a surfactant to keep the foam-forming substance dispersed in a stable emulsified state in water, thereby avoiding the formation of foam.


03
Paraffins
Paraffinic defoamer is a defoamer made by emulsifying and dispersing paraffinic wax or its derivatives with an emulsifier. Its use is similar to that of surfactant-based emulsified defoamers.


04
mineral oil
Mineral oil is the main defoaming ingredient. In order to improve the effect, sometimes metal soap, silicone oil, silicon dioxide and other substances are mixed together. In addition, various surfactants can sometimes be added to make the mineral oil easily spread to the surface of the foaming liquid, or to evenly disperse the metal soap in the mineral oil.

Silicone defoamer
The defoamer is an additive whose function is to eliminate the foam formed by the material during the production process. The main component of the silicone defoamer is silicone oil and silicone components. Silicone oil is a non-volatile oily liquid at room temperature. , animal and vegetable oils and mineral oils are insoluble, or the solubility is very small, and it can withstand high temperature and low temperature. It is chemically inert, physically stable, and has no biological activity.
Silicone defoamer is a white viscous emulsion. It has been used in various industrial fields since the 1960s, but the large-scale and comprehensive rapid development began in the 1980s. As a silicone defoamer, its application fields are also very wide, and it has received more and more attention from all walks of life. Silicone defoamer is an indispensable additive in the production process in chemical industry, papermaking, paint, food, textile, pharmaceutical and other industrial sectors. It can not only remove the foam on the liquid surface of the process medium in the production process, thereby improving filtration, Washing, extraction, distillation, evaporation, dehydration, drying and other process separation, gasification, liquid drainage and other effects, to ensure the capacity of various material storage and processing containers.

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