Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing inorganic compound
Patent
1995-06-06
1997-12-02
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing inorganic compound
205525, C25B 134
Patent
active
056932138
ABSTRACT:
A salt water electrolysis process for electrolyzing an aqueous alkali chloride solution capable of preventing the deterioration of a gas diffusion cathode is disclosed. A cation-exchange membrane having closely disposed to one surface thereof an insoluble metal anode and having closely adhered or mechanically attached to the opposite surface thereof a liquid permeable gas diffusion cathode is disposed in an electrolytic cell, and electrolysis is carried out while supplying salt water to the anode chamber and an oxygen-containing gas containing water as steam or fine water droplets to the cathode chamber, and an alkali hydroxide is obtained from the cathode chamber. The water-containing gas directly reaches the gas diffusion cathode and since the alkali hydroxide and the alkali carbonate formed at the surface of the cathode are dissolved in the water in the gas and removed from the electrolytic cell, deterioration of the gas diffusion cathode can be prevented.
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patent: 4221644 (1980-09-01), LaBarre
patent: 4376691 (1983-03-01), Lindstrom
patent: 4486276 (1984-12-01), Cohn
patent: 4488947 (1984-12-01), Miles
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patent: 5437771 (1995-08-01), Shimamune
Ashida Takahiro
Nishiki Yoshinori
Shimamune Takayuki
Mee Brendan
Niebling John
Permelec Electrode Ltd.
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