Electrowinning metal from chloride solution

Details Electrowinning metal from chloride solution Electrowinning metal from chloride solution

C - Chemistry, Metallurgy

25

C

204/160, 204/76.

C25C 1/00 (2006.01) C25C 1/06 (2006.01) C25C 1/08 (2006.01) C25C 7/00 (2006.01)

Patent

CA 1074251

ABSTRACT OF THE DISCLOSURE A method for electrowinning metal form metal chloride-bearing electrolyte in an electrolytic cell wherein diffusion of chlorine form anolyte to catholyte is limited, thereby limiting concentration of chlorine gas around the cell so as to be within acceptable limits. Catholyte is withdrawn through a catholyte overflow duct in the cell to establish a catholyte level ad the anode is maintained in an electrolyte-permeable diaphragm which is attached to a hood extending above the electrolyte level. Chlorine gas generated at the anode is withdrawn form the hood by applying suction via a suction duct located in the hood above the catholyte level and catholyte is drawn through the diaphragm into the anolyte and upwardly inside the hood. Anolyte is withdrawn therefrom under the suction as an overflow via an anolyte outlet duct in the hood above the catholyte level.

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