Separation membranes prepared from polyamide polymers having 2,2

Details Separation membranes prepared from polyamide polymers having 2,2 Separation membranes prepared from polyamide polymers having 2,2

1997-11-10

1999-07-13

Spitzer, Robert

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

95 53, 95 54, 95 55, 96 14, 21050038, B01D 5322

Patent

active

059221046

ABSTRACT:
This invention provides a polyamide separation membrane, prepared from high molecular weight polyamide having a repeating unit represented by the formula (I) and a process for separating gaseous mixtures using them. ##STR1## wherein, R is an aliphatic or aromatic organic group derived from dicarboxylic acid or halide. The polyamide separation membrane according to the present invention has a large free volume and good permeation properties such as permeability and permeation selectivity.

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