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Oct 10, 2018
Description ofTrichlorosilane
Trichlorosilaneis an important synthesis of organic silicon intermediates, but also thepreparation of semiconductor grade polysilicon and solar cell grade polysiliconof the main raw materials.For a longtime, due to China's smaller production capacity of polysilicon,trichlorosilane is mainly used for organic silicone rubber coupling agent andother silicone materials, the amount of polysilicon is very small.
Hydrogenchloride method: the method is to use metallurgical grade silicon powder as rawmaterial, and hydrogen chloride gas reaction.Is copper oriron-based catalyst, the reaction at 280 ~ 320 ℃ and 0.05 ~3Mpa under:
Hydrogenationof silicon tetrachloride: The reaction is an equilibrium reaction. To improvethe yield of trichlorosilane, it is preferable to carry out the reaction in thepresence of hydrogen chloride.Raw materialsmetallurgical grade products through pre-activation to remove the surfaceoxide, can further improve the yield of trichlorosilane.The reaction is carried out at a temperature of from280 to 320 ° C and from0.05 to 3 MPa: