Process for improving semipermeable membranes by treating with p

Details Process for improving semipermeable membranes by treating with p Process for improving semipermeable membranes by treating with p

1979-03-05

1981-05-19

Henderson, C. A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

20415914, 204165, 210 22D, 210 23H, 210 23F, 210500M, 528485, 528487, 528488, 264 22, C08F 600

Patent

active

042686628

ABSTRACT:
A process for improving the performances of semipermeable membranes which comprise an acrylonitrile polymer containing 40 to 100% by mole of acrylonitrile and have a bubble point of more than 0.1 kg/cm.sup.2, by dipping said membranes in an aqueous solution containing inorganic salts and/or protic acids.

REFERENCES:
patent: 3150917 (1964-09-01), Gagliardi
patent: 3402136 (1968-09-01), Sakuragi
patent: 3551394 (1970-12-01), Sakuragi
patent: 3565876 (1971-02-01), Ball
patent: 3615024 (1971-10-01), Michaels
patent: 3948870 (1976-04-01), Stay
patent: 4067825 (1978-01-01), Hradil
patent: 4147745 (1979-04-01), Sano et al.

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