Electrolysis of alkali metal salts with hydrogen depolarized ano

Details Electrolysis of alkali metal salts with hydrogen depolarized ano Electrolysis of alkali metal salts with hydrogen depolarized ano

1984-07-30

1985-12-31

Metz, Andrew H.

Chemistry: electrical and wave energy

Processes and products

204103, 204104, 204129, C25B 116, C25B 122, C25B 102

Patent

active

045619450

ABSTRACT:
A process for producing sulfuric acid and caustic soda by the electrolysis of an alkali metal sulfate in a membrane cell having a hydrogen depolarized anode. Hydrogen gas in the anode chamber is oxidized to produce hydrogen cations which combine with the sulfate anions from the aqueous alkali metal sulfate solution to produce sulfuric acid. Alkali metal ions are transported across the membrane to the cathode to produce caustic and gaseous hydrogen. By oxidizing hydrogen at the anode, the cell voltage for the electrolysis of the alkali metal sulfate is substantially reduced.

REFERENCES:
patent: 3523755 (1970-08-01), McRae
patent: 3523880 (1970-08-01), Parsi
patent: 3801698 (1974-04-01), Lowrance et al.
patent: 3963592 (1976-06-01), Lindstrom
patent: 4203813 (1980-05-01), Grantham

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