Continuous preparation of silane, SiH.sub.4

Details Continuous preparation of silane, SiH.sub.4 Continuous preparation of silane, SiH.sub.4

1983-08-30

1986-07-22

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204245, 204247, C25B 102, C25B 1508

Patent

active

046017984

ABSTRACT:
Silane, SiH.sub.4, is continuously produced in an integrated process, by continuously (i) reacting a chlorosilane with the lithium hydride recycled in a base mixture of molten salts comprising lithium chloride and at least one other alkali or alkaline earth metal chloride, in a discrete first reaction zone, (ii) recovering silane product from said first reaction zone, (iii) cycling the silane depleted product of reaction from said first reaction zone, which comprises said base mixture and the additional amounts of LiCl produced in said first reaction zone, to a discrete electrolysis second reaction zone, (iv) electrolyzing lithium chloride comprising said first zone reaction product in said electrolysis second reaction zone, (v) recovering chlorine gas from said electrolysis second reaction zone, (vi) cycling the chlorine depleted product of electrolysis from said second reaction zone, which comprises said base mixture and the lithium metal produced in said electrolysis second reaction zone, to a discrete hydrogenation third reaction zone, (vii) hydrogenating the lithium metal comprising said second zone reaction product in said hydrogenation third reaction zone, and (viii) recycling the product of reaction from said hydrogenation third reaction zone, which comprises said base mixture and the first zone reactant lithium hydride produced in said hydrogenation third reaction zone, to said first reaction zone.

REFERENCES:
patent: 3078218 (1963-02-01), Sundermeyer
patent: 3192138 (1965-06-01), Euk et al.
patent: 4041136 (1977-08-01), Franklin et al.

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