Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Rare earth metal
Patent
1993-03-04
1995-07-18
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Rare earth metal
423263, 423185, 423464, 423279, C01F 1700, C01D 316, C01B 908, C01B 3500
Patent
active
054339316
ABSTRACT:
Recovery of cerium values from fluoride-containing ores such as bastnasite is enhanced. The ore is ground, roasted, and leached with dilute hydrochloric acid to produce an ore concentrate. The concentrate is treated with a solution of hydrochloric acid and boric acid to solubilize cerium values and convert fluoride to tetrafluoroborate ion. Tetrafluoroborate is removed from the solution, e.g., by precipitation, and the solution is further processed for recovery of cerium values. Removal of tetrafluoroborate avoids loss of cerium as insoluble cerium tetrafluorborate during said further processing.
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Baroch, C. J., "Processing California Bastnasite Ore," Mining Eng., Mar., 1959, pp. 315-319, vol. 11 (3).
Bos Steven
Thompson Alan H.
Union Oil Company of California
Wirzbicki Gregory F.
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