Method of improving the selectivity of carbon membranes by chemi

Details Method of improving the selectivity of carbon membranes by chemi Method of improving the selectivity of carbon membranes by chemi

1996-08-21

1997-12-09

King, Roy V.

Coating processes

Coating by vapor, gas, or smoke

427249, C23C 1600

Patent

active

056958188

ABSTRACT:
A process for manufacturing carbon membranes having controlled pore sizes comprises the steps of: a) causing a stream of a pyrolysable carbon-containing gas to come into contact with a carbon membrane having a pore size and/or distribution larger than the desired pore size and/or distribution; b) raising the ambient temperature of the said membrane to or above the temperatures at which the adsorbed carbon-containing gas pyrolyzes; and c) substantially purging the atmosphere surrounding the membrane from carbon-containing gas.

REFERENCES:
patent: 4685940 (1987-08-01), Soffer et al.
patent: 4959185 (1990-09-01), Suda
patent: 5024688 (1991-06-01), Oohashi et al.
patent: 5071450 (1991-12-01), Cabrera et al.
patent: 5098880 (1992-03-01), Gaffney et al.

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