Process for the preparation of rare-earth sulphides from halides

Details Process for the preparation of rare-earth sulphides from halides Process for the preparation of rare-earth sulphides from halides

1996-03-21

1998-05-05

Straub, Gary P.

Chemistry of inorganic compounds

Rare earth compound

4235611, 2525194, 2525211, 117 99, 106400, C01F 1700

Patent

active

057469903

ABSTRACT:
The present invention concerns a process for the preparation of a rare-earth sulphide characterized in that a rare-earth halide is brought into the presence of an alkaline or aluminum halide and heated in the presence of hydrogen sulphide at a temperature which is sufficient to volatilize the halides.
More particularly, the halide is a chloride, the rare-earth is cerium and the alkali is sodium.

REFERENCES:
patent: Re14277 (1917-03-01), Garner et al.
patent: 513660 (1894-01-01), Vautin
patent: 3290181 (1966-12-01), Sirtl
patent: 3748095 (1973-07-01), Henderson
patent: 5439660 (1995-08-01), Jansen et al.
patent: 5501733 (1996-03-01), Macaudiere et al.

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