Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1982-04-08
1985-12-24
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204283, 204296, 204290R, C25B 900, C25B 1103, C25B 1308
Patent
active
045604614
ABSTRACT:
In electrolytic cell for use in electrolysis of aqueous alkali metal chloride solutions, which comprises one or more vertical expandable anodes, one or more vertical cathodes and one or more cation-exchange membranes each located between a pair of the opposite anode and cathode plates; an improvement is now provided, which is lying in the newly devised cathode structure comprising a vertical cathode, a flexible and foraminate metal mesh of low hydrogen-overvoltage removably mounted on one side of said cathode, a hydraulically permeable and hydrogen gas bubbles-impenetrable microporous film removably mounted on said metal mesh, and a cation-exchange membrane removably mounted on said microporous film, in such way that the expandable anode as located adjacent to said cation-exchange membrane is able to exert a resilient force to push the cation-exchange membrane against the microporous film, the metal mesh and the cathode plate; and to bring the latter elements into close contact with each other. This cathode structure effectively prevents the cation-exchange membrane from being attached with and covered with the developed hydrogen gas bubbles, resulting in prevention of unduly increased cell voltage in operation of the cell.
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Talivalids Berzins, Electrochemical Characterization of Nafion Perfluorosulfonic Acid Membranes in Chlor-Alkali Cells.
Nakagawa Shuta
Okazaki Toshimasa
Toagosei Chemical Industry Co. Ltd.
Valentine Donald R.
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