Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1990-07-16
1992-02-11
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204296, C25B 1308
Patent
active
050873458
ABSTRACT:
A highly stable cation exhange membrane for use in the electrolysis of an alkali metal chloride is disclosed, which comprises a reinforced base membrane comprised of at least one layer of a fluorocarbon polymer and a reinforcing woven fabric encapsulated therein and a coating disposed on at least one surface of the reinforced base membrane, the coating comprising particles of at least one inorganic material selected from the group consisting of oxides, nitrides and carbides of elements belonging to group IV of the periodic table, which particles have an average primary particle diameter as small as from 0.01 to 0.2 .mu.m, and a binder polymer. In the cation exchange membrane, the coating containing particles of an inorganic material, uniformly and strongly adheres to the surface of the reinforced base membrane, so that the inorganic material can remain in the coating for a prolonged period of time. Accordingly, by the use of the cation exchange membrane, the electrolysis of an alkali metal chloride can be stably performed at an advantageously low cell voltage for a prolonged period of time.
REFERENCES:
patent: 4552631 (1985-11-01), Bissot et al.
patent: 4913817 (1990-04-01), Tsushima et al.
Hiyoshi Tatsuo
Kashiwada Akio
Asahi Kasei Kogyo Kabushiki Kaisha
Gorgos Kathryn
Niebling John
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