Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1976-12-16
1978-07-11
Bascomb, Jr., Wilbur L.
Gas separation
Means within gas stream for conducting concentrate to collector
55 76, 62 18, 203 41, 203 48, 203 74, 423347, B01D 5302
Patent
active
040999360
ABSTRACT:
A process for the purification of a mixture of silane and impurities comprising passing the mixture through a succession of zones connected in series, in a closed system, according to the following steps:
(a) passing the mixture, in gaseous form, through a zone containing porous, granular charcoal as an adsorbent at a temperature in the range of about minus 40.degree. C to about minus 80.degree. C to provide a mixture of silane and remaining impurities in gaseous form;
(b) passing the gaseous mixture from step (a) through a zone containing porous, granular magnesium silicate as a adsorbent at a temperature in the range of about minus 40.degree. C to about minus 80.degree. C to provide a mixture of silane and remaining impurities in gaseous form;
(c) passing the gaseous mixture from step (b) into a distillation zone in such a manner that the impurities are removed overhead in gaseous form and at least about 95 per cent by weight of the silane is converted to liquid bottoms; and
REFERENCES:
patent: 2393625 (1946-01-01), Simons
patent: 2987139 (1961-06-01), Bush
patent: 3041141 (1962-06-01), Shoemaker et al.
patent: 3232702 (1966-02-01), Caswell et al.
patent: 3577220 (1971-05-01), Kuratomi et al.
Bascomb, Jr. Wilbur L.
Bresch Saul R.
Union Carbide Corporation
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