Chlor-alkali electrolysis process carried out in cells provided

Details Chlor-alkali electrolysis process carried out in cells provided Chlor-alkali electrolysis process carried out in cells provided

1994-05-18

1995-05-02

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

204128, C25B 120, C25B 126

Patent

active

054116422

ABSTRACT:
An improved chlor-alkali eletrolysis process carried out in cells comprising at least one couple of expandable anodes provided with mobile surfaces provided with an electrocatalytic coating, the couple being separated by a porous diaphragm, of the type made only of asbestos fibers, consisting in conducting an initial conditioning electrolysis step for a period longer than one hour, preferably between 5 and 10 days, with the anodes maintained in the restrained position by suitable retainers. After said conditioning step, the retainers are removed and the anodes set free to expand so that the respective mobile surfaces get in contact with the surfaces of the diaphragms. Electrolysis is carried out for prolonged times with low cell voltages and without noticeable damaging of the diaphragms.

REFERENCES:
patent: 3873437 (1975-03-01), Pulver
patent: 3941676 (1976-03-01), Macken
patent: 4026785 (1977-05-01), Ford
patent: 4283265 (1981-08-01), Byrd
patent: 4377455 (1983-03-01), Kadija et al.
patent: 4448664 (1984-05-01), Ikegami et al.
patent: 4789443 (1988-12-01), deNora et al.

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