Manufacture of an alkali metal aluminum halide compound and alka

Details Manufacture of an alkali metal aluminum halide compound and alka Manufacture of an alkali metal aluminum halide compound and alka

1987-06-05

1989-07-11

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 68, C25B 100

Patent

active

048469432

ABSTRACT:
A method of making an (alkali metal) (metal) halide compound and an alkali metal, the compound having the formula MDHal.sub.x+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 compound is made by exposing to one another a molten MDHal.sub.x+1 compound, a metal D and an alkali metal halide having the formula MHal. The MDHal.sub.x+1 compound is separated from a molten alkali metal M by means of a separator which is in contact with both the molten MAlHal.sub.4 and molten alkali metal. The separator can include a solid conductor of ions of the alkali metal or a micromolecular sieve having the alkali metal absorbed therein. A sufficient electrical potential is applied across the electrolytic cell D/MHal/MDHal.sub.x+1 .parallel.separator.parallel.alkali metal to cause the following reactions to take place: xMHal+D.fwdarw.XM+DHal.sub.x and MHal+DHal.sub.x .fwdarw.MDHal.sub.x+1. The alkali metal formed in the first reaction passes through the separator and into the molten alkali metal. 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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