Process for preparing rare earth sulfides from halides

C - Chemistry – Metallurgy – 01 – F

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C01F 17/00 (2006.01)

Patent

CA 2172333

La présente invention concerne un procédé de préparation d'un sulfure de terre rare et/ou d'yttrium qui est caractérisé en ce qu'on met en présence un halogénure de terre rare et/ou d'yttrium et un halogénure d'alcalin ou d'aluminium et on chauffe en présence de sulfure d'hydrogène à une température suffisante pour volatiliser lesdits halogénures. L'halogénure peut être plus particulièrement un chlorure. La terre rare peut être plus particulièrement le cérium et l'alcalin le sodium.

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