Preferential chlorination of alumina in kaolinitic ores

Details Preferential chlorination of alumina in kaolinitic ores Preferential chlorination of alumina in kaolinitic ores

C - Chemistry, Metallurgy

01

F

23/167

C01F 7/56 (2006.01) C01F 7/60 (2006.01)

Patent

CA 1089191

ABSTRACT OF THE DISCLOSURE The present invention provides a novel process for the preferential chlorination of alumina over silica in the carbo-chlorination of kaolinitic ores to produce aluminum chloride. The process comprises introducing small amounts of alkali metal compounds with oxyanions into the carbo-chlorination process. Preferred embodi- ments are directed to particular compounds of alkali metals with oxyanions selected from the group consisting of carbonates, sulfate, hydroxides, oxides, phosphates, or the like. The present invention results in signifi- cantly reduced energy, manufacturing, and equipment costs and thus represents a breakthrough in the utilization of domestic ores such as kaolinitic clay for the production of aluminum chloride or of alumina through oxidation of the aluminum chloride.

265201

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