Bipolar electrolyzer element

Details Bipolar electrolyzer element Bipolar electrolyzer element

C - Chemistry, Metallurgy

25

B

204/154

C25B 1/34 (2006.01) C25B 9/20 (2006.01) C25B 11/00 (2006.01) C25B 11/02 (2006.01)

Patent

CA 1176598

ABSTRACT Disclosed is a bipolar electrolyzer having a plurality of indi- vidual electrolytic cells electrically and mechanically in series with a bipolar element between pair of adjacent individual cells. The bipolar element has an anodic side with anodes of the first electrolytic cell of a pair of electrolytic cells depending therefrom, and a cathodic side with the cathodes of the second electrolytic cell of the pair of electrolytic cells depending therefrom. The anodic side of the bipolar element has an acidified alkali metal chloride resistant valve metal surface, and the cathodic side of the bipolar element has an alkali metal hydroxide resist- ant transition metal surface. The bipolar electrolyzer is characterized by the bipolar element having a bonded laminate of a valve metal and a tran- sition metal, a first metal plate of a transition metal, intermittently bonded to the transition metal member of the bonded laminate at the first joints, and a second transition metal plate above the first joints, that is, above the joints between the first transition metal plate and the bonded laminate. The second metal plate is bonded to the first metal plate and second joints whereby to protect the first joints from contact with the catholyte liquor.

381880

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