Methyl silicone oil is one of the earliest commercialized, most widely used and most commonly used silicone polymers. There are two main methods for producing methyl silicone oil: acid balance method and alkali balance method. The acid balance method is suitable for the production of low-viscosity silicone oils with a viscosity of less than 500 mm2 / s. This method generally uses concentrated sulfuric acid as a catalyst, reacts at 50 to 60 ° C, and then removes the acid by washing with water, removing low-boiling substances, adding activated carbon to discolor, and transitioning to a finished product ; And the alkali balance method is suitable for the production of medium and high viscosity silicone oil with a viscosity of 100mm2 / s or more. In the production of methyl silicone oil, the components in the raw material DMC (dimethyl mixed ring) will reach the optimal activation state at different temperatures, and the ring-opening polymerization will be improved to improve the conversion rate, thereby greatly improving the production efficiency. .

After the ring-opening polymerization reaction is completed, the catalyst (CH3) 4NOH is difficult to fully decompose in the process of breaking the medium; and the ammonia gas after the decomposition is also slightly mixed in the system, which causes the odor of silicone oil. After the system is lowered, the temperature is lowered to below 140 ° C, and the dry air is bubbled to increase the gas phase pressure of the system, thereby achieving the purpose of discharging irritating odors.
 
Programmable temperature control method between 90 ~ 120 ℃ and temperature reduction to 140 ° C and dry air bubbling after removal, can obtain colorless, odorless, and qualified methyl silicone oil with various indexes. The average conversion rate is increased by 65%. It's over 80%.