Chemistry: electrical and wave energy – Processes and products
Patent
1991-10-04
1993-11-23
Gorgos, Kathryn
Chemistry: electrical and wave energy
Processes and products
204128, 204296, C25B 116
Patent
active
052640906
ABSTRACT:
A method for the electrolysis of an alkali metal chloride in an electrolytic cell is disclosed, in which use is made of a cation exchange membrane comprising a carboxylate-containing fluorocarbon polymer layer disposed on a cathode compartment side and provided on its surface with an inorganic coating, and a sulfonate and/or carboxylate-containing fluorocarbon polymer layer disposed on an anode compartment side and having a water content of from 3 to 10% by weight. By this method, an alkali metal hydroxide, e.g., sodium hydroxide, can be directly produced in a concentration as high as 45-55 % by weight from a saline solution having an alkali metal chloride concentration as low as from 3.0 to 3.5N with reduced energy consumption, stably for a prolonged period of time.
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Hiyoshi Tatsuo
Kashiwada Akio
Asahi Kasei Kogyo Kabushiki Kaisha
Gorgos Kathryn
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