Method and apparatus for electrolysis of alkali or alkaline eart

Details Method and apparatus for electrolysis of alkali or alkaline eart Method and apparatus for electrolysis of alkali or alkaline eart

1977-09-21

1978-09-12

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, 204266, C25B 116, C25B 1308

Patent

active

041135857

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: 3884777 (1975-05-01), Harke et al.
patent: 3904496 (1975-09-01), Harke et al.
patent: 3909378 (1975-09-01), Walmsley

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