Continuous process for electrolytic refining and electrowinning

Details Continuous process for electrolytic refining and electrowinning Continuous process for electrolytic refining and electrowinning

1976-05-11

1978-06-27

Prescott, Arthur C.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 12, 204 13, 204 52R, 204 53, 204275, C25C 112, C25C 118, C25C 702

Patent

active

040973549

ABSTRACT:
A process and apparatus for the continuous electrolytic refining and electrochemical extraction of elements and compounds, in which cathodes and anodes, connected to a D.C. power supply, are continuously moved through a tank containing electrolyte along parallel paths with the direction of movement of the cathodes being opposite that of the anodes. Since the effective area of the cathodes increases as the effective area of the anodes decreases, the opposite motion of the anodes and cathodes tends to equalize the effective areas of the cathodes and anodes in close proximity with one another along the entire length of travel through the tank, thus allowing a higher current density to be maintained, and a high quality deposit on the cathodes. The cathodes and/or anodes can be in the form of a continuous sheet or a series of individual plates. Also, when continuous cathodes are used, the concentration of additives can be reduced, and thus the efficiency increased, by guiding the lower edge of the cathode in a groove which shields this edge, while allowing the upper edge of the continuous cathode to protrude above the surface of the electrolyte, thus preventing irregular edge deposits and allowing deposits only on the flat continuous surface of the cathodes.

REFERENCES:
patent: 2433441 (1947-12-01), Davidoff
patent: 3396097 (1968-08-01), Wolcott
patent: 3920530 (1975-11-01), Xylander
patent: 4001100 (1977-01-01), Haydock

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