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Synthesis Methods Of Trichlorosilane
Since silicon metal accounts for 66% of the synthesis cost of trichlorosilane, the price of trichlorosilane is highly correlated with the price of silicon metal raw materials. In 2021, the price of silicon metal and trichlorosilane resonated upward due to the influence of photovoltaic demand-pull and energy consumption dual control policy.
At present, there are two main synthesis methods of trichlorosilane: one is the traditional synthesis method, that is the silicon chloride method. The other is hydrolyzation of tetrachloride.
At present, the mainstream method of polysilicon production is the modified Siemens method, using trichlorosilane reduction method. In recent years, with the continuous decline of polysilicon price, polysilicon production enterprises pay more and more attention to the control of production cost. More and more enterprises adopt closed-loop production and cold hydrogenation technology to reduce the consumption of trichlorosilane, which has a certain impact on the demand of trichlorosilane.
