DEHYDRATED MIXTURE OF RARE-EARTH ELEMENTHALIDE AND ALKALINE-EARTH METAL OR ALKALI METAL HALIDE

摘要

Dehydrated mixtures of rare-earth halides and of alkaline-earth or alkali metal halides and a process for the production thereof. …??The invention relates more particularly to mixtures containing a rare-earth halide of the chloride, bromide or iodide type, less than 2.5% by weight of water and less than 4.5% by weight of oxyhalide. These mixtures are obtained by dehydration of the halide hydrates by passing a stream of a halogen-containing dehydrating agent (halogen hydride) through the mass to be dehydrated.