Diaphragms for use in the electrolysis of alkali metal chlorides

Chemistry: electrical and wave energy – Apparatus – Electrolytic

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204 98, 204282, 204296, C25B 146, C25B 1308

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active

041652711

ABSTRACT:
A diaphragm for use in the electrolysis of alkali metal chloride brines in electrolytic diaphragm cells is comprised of a support fabric impregnated with a non-fibrilic active component containing silica. The support fabric has a non-continuous coating of an electroconductive metal on one side of the fabric. Suitable electroconductive metals include nickel, nickel alloys, gold, gold alloys, platinum group metals, platinum group metal alloys, and mixtures thereof.
The diaphragms are physically and chemically stable, provide reduced cell voltages during operation of the cell and have increased operational life.

REFERENCES:
patent: 2116509 (1938-05-01), Cottrell
patent: 3022244 (1962-02-01), LeBlanc et al.
patent: 3407249 (1968-10-01), Landi
patent: 3424659 (1969-01-01), Staal
patent: 3702267 (1972-11-01), Grot
patent: 3775272 (1973-11-01), Danna
patent: 3923630 (1975-12-01), Argade et al.
patent: 4032427 (1977-06-01), Kadija
patent: 4033837 (1977-07-01), Kud et al.
Hackh's Chemical Dictionary, 3rd Ed. by Grant, pp. 78, 233, 536, 829 pub. by Blakiston, Philadelphia 1944.

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