Process for producing semipermeable membranes

Details Process for producing semipermeable membranes Process for producing semipermeable membranes

1976-08-13

1979-04-03

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

20415914, 20415916, 264 41, 264 49, 264 83, 264347, 210500M, B29H 720

Patent

active

041477456

ABSTRACT:
A method for the preparation of a semipermeable membrane which comprises exposing porous shaped articles of polyacrylonitrile or copolymers thereof containing acrylonitrile in an amount of more than 40% by mole to a plasma.
The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.

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patent: 3992495 (1976-11-01), Sano et al.
patent: 4025439 (1977-05-01), Kamada et al.
patent: 4046643 (1977-09-01), Sano et al.

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