Situ cleaning of electrolytic cells

Details Situ cleaning of electrolytic cells Situ cleaning of electrolytic cells

1978-03-09

1979-09-18

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204 64R, 204 66, 204 70, C25C 300, C25C 304, C25C 306, C25C 334

Patent

active

041682157

ABSTRACT:
A method is provided for removing aluminum or compounds thereof causing a short circuit in an electrolytic cell containing aluminum chloride dissolved in a molten solvent of higher decomposition potential, the cell used for the production of aluminum from aluminum chloride and having a terminal anode and cathode providing an inter-electrode space therebetween. The method comprises removing aluminum chloride and molten solvent from the cell to an extent which exposes the materials in the inter-electrode space causing the short circuit, introducing a source of chlorinating agent to the cell and contacting the materials causing the short circuit with the chlorinating agent to form aluminum chloride, the contacting being for a time sufficient to remove the short circuit thereby permitting the addition of the aluminum chloride and solvent and the electrolysis thereof for the production of aluminum.

REFERENCES:
patent: 1254531 (1918-01-01), Partanen
patent: 3464900 (1969-09-01), Foley et al.
patent: 3755099 (1973-08-01), Haupin
patent: 4076602 (1978-02-01), Wheeler

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