Method of improving characteristic of cation-exchange membrane b

Details Method of improving characteristic of cation-exchange membrane b Method of improving characteristic of cation-exchange membrane b

1978-06-07

1979-11-13

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

521 30, 521 31, 525331, B01D 1504, C08F 1418, C08J 522

Patent

active

041744268

ABSTRACT:
A homogeneous cation-exchange membrane made of one or more fluorinated polymer having cation-exchangeable groups is swollen with a water miscible organic solvent and then the solvent is removed from the swollen membrane and then membrane is treated with hydrochloric acid.
The cation-exchange membrane of the fluorinated polymer having cation-exchangeable groups is modified to reduce the permeability of hydroxyl group ions by swelling it and removing the water-miscible organic solvent and then, treating it with hydrochloric acid.

REFERENCES:
patent: 3684747 (1972-08-01), Coalson et al.
patent: 3843617 (1974-10-01), Orlov et al.

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