The liquid waste silicon oil is treated with solvent vapor, and the impurities in the waste silicon oil are dissolved and extracted by using the dissolution of the solvent when it condenses, and another liquid phase immiscible with the silicon oil is formed. This method can dissolve and remove polychlorinated polycyclic aromatic hydrocarbons (PCBs) in waste silicone oil. The treated silicone oil also contains traces of solvent, which can be removed by vacuum drying
Physical properties of silicone oil It is a parameter n1r2r that has a great relationship with the temperature of silicone oil


λ is the structural factor of the viscous coupling, ω is the input speed difference of the viscous coupling, which determines

The shear rate of silicone oil is determined when the radius and number of inner and outer blades of the viscous coupling and the type of silicone oil are determined.

The main factors affecting the transmission of shear torque by viscous couplings are blade spacing, operating temperature and shear rate.

Among them, the blade spacing is a structural factor, and the working temperature and shear rate will affect the working performance of silicone oil.

Waste silicone oil is usually regenerated in two ways. The waste silicone oil in electrical equipment is mainly treated by adsorption and refining. The waste silicone oil can be contacted and refined with adsorbents such as silica gel, activated alumina, activated clay, and activated carbon. After filtering out the waste adsorbent, vacuum degas the silicone oil at 50-110°C (such as vacuum degassing at 95°C) or strip it with nitrogen blowing at 20-80°C to obtain purified regenerated silicone oil.
Silicone lubricants have the advantages of high viscosity index, good heat resistance, and low freezing point, and can work in a wide temperature range. The chemical properties of silicone oil are relatively warm, but after long-term use, it will also deteriorate due to oxidation and the intrusion of foreign impurities. Due to the high price of silicone oil, it should be recovered and regenerated separately.

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