Manufacture of an alkali metal aluminium halide compound and...

Details Manufacture of an alkali metal aluminium halide compound and... Manufacture of an alkali metal aluminium halide compound and...

C - Chemistry, Metallurgy

25

C

204/45

C25C 3/02 (2006.01) C25B 1/26 (2006.01) C25C 3/08 (2006.01) C25C 7/00 (2006.01) C25C 7/06 (2006.01)

Patent

CA 1311212

ABSTRACT The invention relates to a method of making an (alkali metal) (metal) halide compound and an alkali metal, the compound having the formula MHalx+1 in which D is a metal; M is an alkali metal; Hal is a halide; and x is the valency of the metal D. The method comprises exposing to one another molten MDHalx+1 compound, a metal (D) and an alkali metal halide according to the formula MHal where the M and Hal in the MHal are as defined above and are the same alkali metal and halide respectively as in the MDHalx+1; and separating the MDHalx+1 compound from a molten alkali metal which is the same as the alkali metal in the MDHalx+1 and the MHal, by means of a separator which is in contact with both said molten MAlHal4 and molten alkali metal and comprises a solid conductor of ions of said alkali metal or comprises a micromolecular sieve having said alkali metal absorbed therein. A sufficient electrical potential is applied across the electrolytic cell D/hlHal/MDHalx+1//separator//alkali nletal to cause the following reactions to take place: Image and Image The alkali metal formed in reaction (1) passes through the separator and into the molten alkali metal, and the electrical potential is a direct current potential arranged so that electrons are fed via an external circuit into the molten alkali metal.

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