Alkali metal hydroxide generation system and the method therefor

Details Alkali metal hydroxide generation system and the method therefor Alkali metal hydroxide generation system and the method therefor

1990-09-26

1993-02-16

Langel, Wayne

Chemistry: electrical and wave energy

Processes and products

204129, 20415748, 204193, 204242, C01B 700, C25B 102, C25B 116

Patent

active

051867940

ABSTRACT:
Disclosed are both an apparatus and method for the radiation-augmented electrolytic production of alkali metal hydroxide, molecular halogen, and hydrogen.
Reduction of electrical energy requirements is achieved by using radiation to activate photo-sensitive metallic hexahalide ions, which reduces the electrolysis electrode potential. By utilizing radiation-augmented electrolysis, the conventional halogen oxidation reaction is replaced by oxidation of a metallic hexahalide, which occurs at a lower overvoltage and smaller reversible cell potential. Radiant energy thus replaces electrical energy for the production of alkali metal hydroxide, molecular halogen, and hydrogen. Since the action of radiation on the oxidized form of the metallic hexahalide, in the presence of a concentrated halide ion, leads to the production of free halogen gas, the net products are not modified by use of the metallic hexahalide, but the energy requirement of the process is reduced.

REFERENCES:
patent: 4051005 (1977-09-01), Krascella
patent: 4210501 (1980-07-01), Dempsey et al.
B. Reichman et al., "Photoproduction of Halogens Using Platinized TiO.sub.2 ", NASA Tech Briefs, vol. 5, No. 4 (Winter 1980), pp. 449-450.

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