Metal anodes with reduced anodic surface and high current densit

Details Metal anodes with reduced anodic surface and high current densit Metal anodes with reduced anodic surface and high current densit

1977-09-15

1979-01-16

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204105M, 204280, 204284, 204288, 204290F, C25C 122, C25C 702

Patent

active

041348060

ABSTRACT:
Describes an electrochemical process operated at relatively low cathodic current density and high anodic current density, particularly for electrowinning and electrorefining processes using dimensionally stable metal anodes with reduced anodic electrocatalytic surfaces to allow full exploitation of the advantages of insoluble metal anodes, such as lower overvoltages, high current density capability, and purer deposits, together with an economical employment of expensive anode materials. Cathodic/anodic current densityratios down to 1/20 are used without materially decreasing overall process efficiency or product's morphology. Choice of geometric parameters, practical aspects, typical embodiments and examples are disclosed.

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