Process for preparing of semipermeable membranes

Details Process for preparing of semipermeable membranes Process for preparing of semipermeable membranes

1977-01-24

1979-08-07

Spear, Jr., Frank A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

264 22, 427 40, 204165, 210500M, C08J 324, C08J 328, C08J 710

Patent

active

041637259

ABSTRACT:
A method for the preparation of semipermeable membrane which comprises exposing porous shaped articles of polysulfone to a plasma.
The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.

REFERENCES:
patent: 3309299 (1967-03-01), Mantell
patent: 3615024 (1971-08-01), Michaels
patent: 3639134 (1972-02-01), Stegmeier et al.
patent: 3775308 (1973-11-01), Yasuda
patent: 3846521 (1974-11-01), Osterholtz
patent: 3847652 (1974-11-01), Fletcher et al.
patent: 3992495 (1976-11-01), Sano et al.
patent: 4032440 (1977-06-01), Yasuda
patent: 4046843 (1977-09-01), Sano et al.

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