C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
C25C 3/04 (2006.01) C25C 7/00 (2006.01)
Patent
CA 2130780
A process for electrolytically producing magnesium metal from MgCl2 dissolved in an electrolyte, by conversion to the product metal and chlorine gas, wherein the MgCl2 content of the electrolyte is replenished by supplying thereto a feed having as components one or more magnesium chloride ammoniates for decomposition by the heat of the electrolyte into MgCl2 and ammonia gas. The feed, which may also include uncombined MgCl2, is delivered to the electrolyte at a location at which the generated ammonia does not come into reactive contact with the chlorine gas. The temperature of the electrolyte as well as its MgCl2 content can be controlled by selection of feed components, relative proportions, and rate of supply. The ammoniate content of the feed can be produced by reaction of ammonia with magnesium chloride hydrates, using the ammonia gas generated by the decomposition.
Alcan International Limited
Kirby Eades Gale Baker
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