Process for electrolytically producing aluminum

Details Process for electrolytically producing aluminum Process for electrolytically producing aluminum

1977-11-15

1979-01-23

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

C25C 306

Patent

active

041359941

ABSTRACT:
A process for producing aluminum by electrolyzing fused aluminum chloride together with an alkali metal halide to produce chlorine gas at the anode surface and molten aluminum at the cathode surface where the electrolytic bath is of a molten mixed salt consisting essentially of 2 to 15% by weight AlCl.sub.3, 15 to 70% by weight CaCl.sub.2 and/or MgCl.sub.2, provided the amount of CaCl.sub.2 does not exceed 40% by weight, and 83 to 15% by weight NaCl. Metallic aluminum can be produced by electrolyzing aluminum chloride at a high current efficiency reaching about 90 to nearly 100%.

REFERENCES:
patent: 3822195 (1974-07-01), Dell et al.

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