Method for producing silanes

Details Method for producing silanes Method for producing silanes

2008-01-29

2008-01-29

Johnson, Edward M. (Department: 1754)

Chemistry of inorganic compounds

Silicon or compound thereof

Halogen containing

Reexamination Certificate

active

07323155

ABSTRACT:
The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper-pure water in one or several steps; b) transferred in the water-moist state to the reactor in which the disproportionation is to proceed; c) treated in the reactor with boiling methanol or rinsed with anhydrous methanol; and d) the methanol is removed from the catalyst by evacuation and/or stripping with inert gas. The invention further relates to a method for treating disproportionation catalysts.

REFERENCES:
patent: 4701430 (1987-10-01), Jung et al.
patent: 4725420 (1988-02-01), Tachikawa et al.

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