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Optimize The Process Of Trichlorosilane Distillation
Our company adopts advanced computer simulation software to simulate and optimize the process of trichlorosilane distillation in detail. On this basis, the optimized process and technology are obtained, and the purpose of energy saving and consumption reduction is achieved. The distillation process of trichlorosilane was designed and calculated by using modern high efficiency technology and applied in practical production. The application shows that this distillation technology through theoretical optimization and high efficiency tray improvement, can achieve a great increase in product quality, boron content reduced to very low, trichlorosilane emissions reduced by more than 50%, while saving energy by 20% ~ 30%, achieve the purpose of large scale increase in economic benefits.
The mixture of trichlorosilane and polysilicon, which is a by-product of the recombination from the bottom of the distillation column in the production of trichlorosilane and polysilicon, was used as raw material to prepare silica by gas phase hydrolysis. The effects of gasification temperature, flow rate and flow ratio of water vapor and chlorosilane mixture on physicochemical properties of the products were investigated. The results showed that the optimal process conditions were gasification temperature 155℃, ventilation flow rate of chlorosilane mixture 120 mL/min, and flow rate ratio of water vapor to chlorosilane mixture 4.1. The resulting product is amorphous superfine silica powder with DBP absorption value of 2.49 mL/g, specific surface area of 122.49 m~2/g, silica content (dry base) of 99.7%, and particle size d50 of 10.48μm.
