Patent ID: 8524044

Claim:
A system for purifying a silane-containing stream comprising silane and one or more compounds having a boiling point greater than silane and being substantially free of trichlorosilane, tetrachlorosilane and tetrafluorosilane, the system comprising: a silane-containing stream conveying apparatus for conveying the silane-containing stream to a heavy-ends distillation column, wherein the silane-containing stream conveying apparatus is operatively connected to the heavy-ends distillation column; the heavy-ends distillation column for producing a silane-enriched overhead fraction and a silane-depleted bottoms fraction relative to the silane-containing stream, the silane-depleted bottoms fraction produced from the heavy-ends distillation column comprising silane and being enriched in one or more compounds having a boiling point greater than silane relative to the silane-containing stream; and a silane-recovery distillation column for producing a silane-recovery column silane-enriched overhead fraction and a silane-recovery column silane-depleted bottoms fraction relative to the silane-depleted bottoms fraction produced from the heavy-ends distillation column.