Semipermeable membranes based on specific 4,4'-(1H-alkylidene)bi

Details Semipermeable membranes based on specific 4,4'-(1H-alkylidene)bi Semipermeable membranes based on specific 4,4'-(1H-alkylidene)bi

1989-12-06

1991-02-19

Spear, Frank

Gas separation

Means within gas stream for conducting concentrate to collector

21050028, 210490, 55 68, B01D 7148

Patent

active

049940953

ABSTRACT:
Permeable membranes comprised predominantly of specifically defined polyester of 4,4'-(1H-alkylidene)bis[2,3,6-trialkylphenol] and aromatic dicarboxylic acids. The invention also pertains to the novel permeation processes for recovery of an oxygen
itrogen or carbon dioxide/methane or helium/methane component from a mixture of said component with other components in the mixture.

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patent: 3822202 (1974-07-01), Hoehn
patent: 3899309 (1975-08-01), Hoehn et al.
patent: 4818254 (1989-04-01), Anano et al.
patent: 4822382 (1989-04-01), Nelson
L. A. Pilato et al., Polymers for Permselective Membrane Gas Separations, Amer. Chem. Soc. Div. Polym. Chem., Polym. Prepr., 16(2) (1975), 41-46.

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