Molten salt bath for electrolytic production of aluminum

Details Molten salt bath for electrolytic production of aluminum Molten salt bath for electrolytic production of aluminum

C - Chemistry, Metallurgy

25

C

204/49

C25C 3/18 (2006.01)

Patent

CA 1229065

Abstract of the Disclosure An improved process for the electrolytic produc- tion of aluminum by electrolysis of aluminum chloride in a molten salt electrolyte bath. The improved process is charac- terized by a reduction in solubility of the reduced aluminum metal as well as a smaller metal droplet size permitting closer anode-cathode spacing in the electrolysis cell and a lower electrical resistance. The improvement comprises performing the electrolysis in an electrolyte consisting essentially of from 0.5 to 15 wt.% aluminum chloride, from 0.5 to 40 wt.% of one or more alkaline earth metal chlorides selected from the class consisting of magnesium chloride, barium chloride, strontium chloride and calcium chloride, from 10 to 90 wt.% lithium chloride and the balance sodium chloride.

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