Patent ID: 9011803
Filing Date: 2015-04-21
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 (1) silicon tetrahalide, and (2) trihalosilane; by reacting silicon with at least one of: a hydride reactor in combination with a reaction mixture containing a solvent and metallic alkali or alkaline earth metal, wherein metallic alkali or alkaline earth metal discharged from the vessel is reacted with hydrogen to produce an alkali or alkaline earth metal hydride, the hydride reactor being a stirred-tank reactor in which hydrogen is bubbled through the reaction mixture to produce alkali or alkaline earth metal hydride suspended in the solvent; and 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 separate from the hydride reactor.