Chemistry: electrical and wave energy – Processes and products
Patent
1985-04-25
1986-03-25
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
C25B 116
Patent
active
045781591
ABSTRACT:
A process for the electrolysis of an aqueous solution of an alkali metal halide in an electrolytic cell having an anode compartment containing at least one anode, a cathode compartment containing at least one cathode, and a cation exchange membrane separating the anode compartment from the cathode compartment comprises feeding the aqueous solution of an alkali metal halide to the anode compartment; feeding an oxygen-containing gas to the cathode compartment; and electrolyzing the alkali metal halide solution to produce a halogen gas and alkali metal ions in the anode compartment. The alkali metal ions and water are passed through the cation exchange membrane into the cathode compartment to contact a hydrophilic porous cathode. The alkali metal ions, the water and the oxygen-containing gas produce a concentrated alkali metal hydroxide solution which flows through a hydrophilic porous cathode. The concentrated alkali metal hydroxide solution is removed from the cathode compartment to prevent a substantial accumulation of the concentrated alkali metal hydroxide solution in the cathode compartment.
The process of the present invention provides operation of the membrane all independently of oxygen gas and liquid diffusion rates to permit high current densities to be employed.
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Dotson Ronald L.
Justice David D.
Miles Ronald C.
Chapman Terryence
Clements Donald F.
Haglind James B.
Niebling John F.
Olin Corporation
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