Cell and process for electrolyzing aqueous solutions using a por

Details Cell and process for electrolyzing aqueous solutions using a por Cell and process for electrolyzing aqueous solutions using a por

1977-03-28

1979-02-20

Lefevour, Charles F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204283, 204284, 204290F, 204 98, C25B 900

Patent

active

041406150

ABSTRACT:
Electrolysis of alkali metal chloride solutions to produce chlorine and alkali metal hydroxides is accomplished in a cell comprising an anode compartment, a cathode compartment, a cation permeable divider separating the anode compartment from the cathode compartment, where the anode compartment contains an anode separator. The anode separator is comprised of a porous plate of a valve metal having an electrochemically active coating on the face, and an electrochemically non-active barrier layer on the back and a portion of the interior. The anode separator is positioned in the anode compartment so that the back of the anode separator is spaced apart from the cation permeable divider. An alkaline brine zone is formed between the anode separator and the cation permeable divider which increases the service life of the cation permeable divider. In addition, the anode separator provides improved chlorine gas separation properties, increased service life for the electroconductive coating on the face, and enables the cell to operate with a reduced cell voltage.

REFERENCES:
patent: 3959095 (1976-05-01), Marks et al.
patent: 4032427 (1977-06-01), Kadija
patent: 4035255 (1977-07-01), Gritzner

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