C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/192, 204/57.
C25B 1/46 (2006.01) C25B 11/03 (2006.01)
Patent
CA 1195647
ABSTRACT OF THE DISCLOSURE The use of a flat perforated plate anode having openings of which the circumferential lengths in total are 3 m/dm2 or more in combination with a cation exchange mem- brane has been found to be extremely effective for rendering the current distribution in the cation exchange membrane uniform in practice of the ion exchange membrane process for the electrolysis of an aqueous solution of an alkali metal chloride so that not only elevation of the electrolytic voltage but also accelerated deterioration of the cation exchange membrane can be avoided. Such use also has been found to have the effect that the voltage drop at the cation exchange membrane is decreased as compared with the case where an expanded metal anode is used. Further, when the coating of the flat perforated plate anode on its front sur- face and the inner wall surfaces of the openings has a thick- ness larger than that of the coating on the back surface, the perforated plate anode has high durability and exhibits low electrolytic voltage for a long time as compared with the perforated plate anode which has, on each surface, a coating with the same thickness.
375306
Matsuoka Hiroyoshi
Yoshida Mitsuo
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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