Composite porous carbonaceous membranes

Details Composite porous carbonaceous membranes Composite porous carbonaceous membranes

1994-04-12

1996-04-16

Vargot, Mathieu D.

Gas separation: apparatus

Apparatus for selective diffusion of gases

Plural layers

55DIG5, 264 295, 502418, 95 55, C01B 3108, B01D 5322

Patent

active

055078605

ABSTRACT:
Improved composite semipermeable membranes including microporous carbonaceous adsorptive material supported by a porous substrate for use in separating multicomponent gas mixtures in which certain components in the mixture adsorb within the pores of the adsorptive material and diffuse by surface flow through the membrane to yield a permeate stream enriched in these components. Methods for making the improved composite membranes are described including one or more oxidation steps which increase the membrane permeability and selectivity.

REFERENCES:
patent: 4371454 (1983-02-01), Hisatsugu et al.
patent: 4775655 (1988-10-01), Edwards et al.
patent: 4880765 (1989-11-01), Knoblauch et al.
patent: 4999330 (1991-03-01), Bose et al.
patent: 5104425 (1992-04-01), Rao et al.

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