Gas separation membranes

Details Gas separation membranes Gas separation membranes

1977-06-06

1979-01-16

Spitzer, Robert H.

Gas separation

Means within gas stream for conducting concentrate to collector

55158, 210490, B01D 1300, B01D 5322

Patent

active

041347420

ABSTRACT:
A dry, fabric supported, polymeric gas separation membrane, such as cellulose acetate, is prepared by casting a solution of the polymer onto a shrinkable fabric preferably formed of synthetic polymers such as polyester or polyamide filaments before washing, stretching or calendering (so called griege goods). The supported membrane is then subjected to gelling, annealing, and drying by solvent exchange. During the processing steps, both the fabric support and the membrane shrink a preselected, controlled amount which prevents curling, wrinkling or cracking of the membrane in flat form or when spirally wound into a gas separation element.

REFERENCES:
patent: 3397790 (1968-08-01), Newby et al.
patent: 3565981 (1971-02-01), Lauro
patent: 3592672 (1971-07-01), Rowley et al.
patent: 3872014 (1975-03-01), Schell
patent: 3914479 (1975-10-01), Yamagata et al.
patent: 3948781 (1976-04-01), Brun et al.
patent: 3950255 (1976-04-01), Ishii et al.
patent: 3984328 (1976-10-01), Brun et al.
patent: 3993566 (1976-11-01), Goldberg et al.

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