Semipermeable membranes from modified polymers

Details Semipermeable membranes from modified polymers Semipermeable membranes from modified polymers

1980-07-25

1981-12-15

Spear, Jr., Frank A.

Liquid purification or separation

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210654, 210655, 536 66, B01D 3100

Patent

active

043058230

ABSTRACT:
Polymers from the group consisting of cellulose and its ester and ether derivatives, of polyvinyl alcohol and its ester derivatives, copolymers with vinyl esters and homopolymers and copolymers of acrylates and methacrylates are modified with monofunctional or difunctional cyclic .beta.-ketonic acids or their esters, in particular with succinylsuccinic acid or its ester derivatives. The modified polymers are particularly suitable for obtaining semi-permeable membranes for osmotic separation methods.

REFERENCES:
patent: 1867123 (1932-07-01), Weihe
patent: 2689863 (1954-09-01), Broderick et al.
patent: 2759925 (1956-08-01), Hiatt et al.
patent: 2794799 (1957-06-01), Hiatt et al.
patent: 2856399 (1958-10-01), Mench et al.
patent: 3642773 (1972-02-01), Littman
H. Holtschmidt, Makrol Chem. 13, 141, (1954).

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