Aluminum production via the chlorination of aluminum...

Details Aluminum production via the chlorination of aluminum... Aluminum production via the chlorination of aluminum...

C - Chemistry, Metallurgy

01

F

23/167, 204/49

C01F 7/58 (2006.01) C25C 3/06 (2006.01)

Patent

CA 1197664

Abstract An improved method of producing anhydrous aluminum chloride via aluminum chloride hexahydrate is provided. In a preferred embodiment the method is incorporated into a process for producing aluminum from aluminous ores, and particularly from domestic ore sources comprising (1) acid leaching an aluminous ore to produce aluminum chloride hexahydrate (ACH); (2) calcining the ACH to a specific temperature of above about 450°C to produce highly reactive aluminous particles containing high residual chloride and low residual hydrogen levels; (3) reductively chlorinating the calcined ACH at a low temperature to produce anhydrous aluminum chloride suitable for electrolytic reduction; and (4) electrolytically reducing the anhydrous aluminum chloride in a fused salt to produce aluminum metal and chlorine which is recycled to step (3).

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