Patent ID: 8388914
Filing Date: 2013-03-05
Classification: B01J,C01B,C25B

Abstract:
1. A system for producing silane in a substantially closed-loop process, the system comprising: a vessel for electrolyzing an alkali or alkaline earth metal halide salt to produce metallic alkali or alkaline earth metal and halogen gas; a halogenation reactor for producing at least one of a hydride reactor for reacting metallic alkali or alkaline earth metal discharged from the vessel and hydrogen to produce an alkali or alkaline earth metal hydride; a silane reactor for reacting at least one of (1) silicon tetrahalide, and (2) trihalosilane with the alkali or alkaline earth metal hydride to produce silane and an alkali or alkaline earth metal halide salt, the silane reactor being a stirred tank reactor in which a halogenated silicon feed gas comprising at least one halosilane selected from the group consisting of silicon tetrahalide and trihalosilane is bubbled through a reaction mixture containing a solvent and alkali or alkaline earth metal hydride dispersed in the solvent and wherein the alkali or alkaline earth metal halide salt that is produced is dissolved or suspended in the solvent; and a separator for separating the solvent and the alkali or alkaline earth-metal halide salt.