Ion exchange polymer film, consisting of fluorinated polymer wit

Details Ion exchange polymer film, consisting of fluorinated polymer wit Ion exchange polymer film, consisting of fluorinated polymer wit

1975-10-20

1978-04-18

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

204 98, 204100, 204129, 204252, 260 793M, C09D 378

Patent

active

040850714

ABSTRACT:
An ion exchange film comprises a fluorine-containing polymer with (1) ion exchange sites present in a first layer as N-monosubstituted sulfonamido groups or salt thereof formed through reaction of a primary amine and (2) ion exchange sites present in a second layer of the film other than as said N-monosubstituted group or salt thereof. The film is suitable as a separator in a cell for electrolysis of an alkali or alkaline earth metal halide particularly sodium chloride in producing hydrogen, chlorine and caustic soda. In making concentrated caustic soda, high current efficiencies have been obtained in operation of the cell.

REFERENCES:
patent: 3240723 (1966-03-01), Friedlander
patent: 3647086 (1972-03-01), Mizutani
patent: 3784399 (1974-01-01), Grot
patent: 3849243 (1974-11-01), Grot
patent: 3909378 (1975-09-01), Walmsley

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