Electrolytic refining

Details Electrolytic refining Electrolytic refining

1975-09-10

1976-08-17

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204109, 75101BE, 423 24, C25C 112, C25C 120

Patent

active

039752445

ABSTRACT:
In the electrolytic refining of silver that contains a significant amount of copper, the electrolyte is withdrawn from the refining cell, preferably continuously but alternatively at intervals, and is contacted with an immiscible liquid phase containing a selective complexing agent for cupric ions. The liquid phase carries away at least some copper from the electrolyte without the need to remove the silver first. The treated electrolyte, depleted of copper, is re-usable and is normally returned to the cell. In a continuous-withdrawal system a steady copper level can be maintained in the electrolyte. The complexing-agent phase can be regenerated and copper recovered from it.

REFERENCES:
patent: 3224873 (1965-12-01), Swanson
patent: 3674464 (1972-07-01), Chiola et al.

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