Process for separating gaseous mixtures using a semipermeable me

Details Process for separating gaseous mixtures using a semipermeable me Process for separating gaseous mixtures using a semipermeable me

1983-11-29

1986-05-06

Therkorn, Ernest G.

Gas separation

Means within gas stream for conducting concentrate to collector

55158, 585818, B01D 5322

Patent

active

045869391

ABSTRACT:
The process for the separation of gases from a mixture is improved by using as the separation vehicle a single layer semipermeable membrane containing at least about 25 weight percent, based upon the total weight of the membrane, of at least one substituted poly(arylene oxide) polymer containing at least about 50 mole percent of structural units of the formula ##STR1## wherein each R is independently a C.sub.1 to C.sub.8 aliphatic; a C.sub.5 to C.sub.7 cycloaliphatic; a C.sub.1 to C.sub.8 alkoxy radical; a C.sub.6 to C.sub.12 aromatic radical or an inertly-substituted derivative of any one of them, each radical being free of a tertiary alpha-carbon atom, each X is independently hydrogen or a radical at least the size of a chloride radical, with the proviso that at least one X is not hydrogen. The process can also be practiced with a semipermeable membrane containing at least about 50 weight percent, based upon the total weight of the membrane, of at least one substituted poly(arylene oxide) copolymer containing from about 80 to 95 mole percent of structural units of the formula ##STR2## and from about 5 to 20 mole percent of structural units of the formula ##STR3##

REFERENCES:
patent: 3306875 (1967-02-01), Hay
patent: 3350844 (1967-11-01), Robb
patent: 3830733 (1974-08-01), Spivack
patent: 3899309 (1975-08-01), Hoehn et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4353802 (1982-10-01), Hara
White and Orlando, "Brominated Poly(Phenylene Oxides) II Bromination of Poly(2,6-Dimethyl-1,4-Phenylene Oxide)", Polyethers, 12, 178 (1974).

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