Semipermeable membranes prepared from polymers containing adjace

Details Semipermeable membranes prepared from polymers containing adjace Semipermeable membranes prepared from polymers containing adjace

1983-06-01

1987-05-05

Sadowski, David

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210640, 210654, 21050027, 21050028, 21050034, 21050036, 21050037, 21050042, 55 16, B01D 1300

Patent

active

046630503

ABSTRACT:
Semipermeable membranes useful for separating mixtures of ethanol and water into enriched fractions of each are prepared by cross-linking 50-90 weight percent of at least one polymer containing pendent, adjacent carboxy groups with 10-50 weight percent of at least one diamine. Membranes prepared from copolymers of maleic anhydride and styrene cross-linked with a polyoxyalkylene diamine are exemplary. These membranes are also useful in gas separation processes, such as separating oxygen from nitrogen.

REFERENCES:
patent: 3696031 (1972-10-01), Credali et al.
patent: 4197148 (1980-04-01), Shimomura
patent: 4250029 (1981-02-01), Kiser et al.
patent: 4289668 (1981-09-01), Li
patent: 4292417 (1981-09-01), Ishii et al.
patent: 4302336 (1981-11-01), Kawaguchi et al.
Sourirajan, S., Reverse Osmosis and Synthetic Membranes, Nat. Res. Con. of Canada, NRCC 13627, 1977, pp. 5-13, 19-21, 202 and 534-536.

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