Process for producing semipermeable membranes

Details Process for producing semipermeable membranes Process for producing semipermeable membranes

1978-12-27

1981-05-05

Robinson, Ellis P.

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Structurally defined web or sheet

Including components having same physical characteristic in...

2105002, 264 22, 264 83, 264 85, 264 49, 427 40, 428215, 428305, 428398, 428411, 428520, 428522, 521 27, 521 33, 525336, 525344, B32B 702, B01D 3916

Patent

active

042659590

ABSTRACT:
A method for the preparation of semipermeable membranes which comprises sulfonating porous membranes of acrylonitrile polymers containing acrylonitrile in an amount of 40% to 100% by mole.
The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.

REFERENCES:
patent: 3140265 (1964-07-01), Richter
patent: 3218301 (1965-11-01), Moody
patent: 3247133 (1966-04-01), Chen
patent: 3297595 (1967-01-01), Mindick
patent: 3320218 (1967-05-01), Levine
patent: 3847652 (1974-11-01), Hollahan
patent: 4147745 (1979-04-01), Sano

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