SYSTEMS FOR PRODUCING SILANE

摘要

Methods and systems for producing silane that use electrolysis to regenerate reactive components therein are disclosed. The methods and systems may be substantially closed-loop with respect to halogen, an alkali or alkaline earth metal and/or hydrogen.

主权项

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:
(1) halogen gas discharged from the vessel; and(2) hydrogen halide produced by contacting halogen gas discharged from the vessel with hydrogen; a disproportionation system for producing monohalosilane or dihalosilane from at least one of (1) silicon tetrahalide and (2) trihalosilane to produce a halogenated silicon feed gas consisting essentially of halosilanes; 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; and a silane reactor for reacting the halogenated silicon feed gas with the alkali or alkaline earth metal hydride to produce silane and an alkali or alkaline earth metal halide salt.