C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
23/167
C01F 7/62 (2006.01)
Patent
CA 1222119
ABSTRACT The purification of aluminum chloride, with the crude aluminum chloride normally being obtained through a process of carbo-chlorination of metallic ores, in particularly aluminum bearing ores, to make the metallic chlorides, in particular aluminum chloride. In the present invention, if the crude aluminum chloride does not contain traces of sulfur, the crude aluminum chlo- ride is blended with elemental sulfur or an equivalent sulfur containing compound and simultaneously elemental aluminum powder or an equivalent aluminum containing compound in the solid state is added to the crude alumi- num chloride. This blend is kept at 180°C at one atmos- phere of pressure and is fed into a screw-type sublimer wherein the substantially pure aluminum chloride under- goes sublimation in the presence of elemental nitrogen as a purging agent and under constant agitation. The sublimed aluminum chloride is streamed into a reaction ground bed containing aluminum granules at approximately 250°C for removal of the traces of elemental sulfur therefrom. The then pure aluminum chloride, in the vapor state, is condensed for subsequent collection. If necessary, the aluminum chloride may be further purified through a rectification column and subsequent collection thereafter. - 21 -
472661
Kirby Eades Gale Baker
Toth Aluminum Corporation
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