Recovery of cerium from fluoride-containing ores

Details Recovery of cerium from fluoride-containing ores Recovery of cerium from fluoride-containing ores

1990-09-19

1993-05-04

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Rare earth metal

423 211, 423293, 423185, 75739, 75743, C01F 1700

Patent

active

052079953

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.

REFERENCES:
patent: 377701 (1888-03-01), Von Welsbach
patent: 2564241 (1951-08-01), Warf
patent: 3812233 (1974-05-01), Duncan
patent: 4051219 (1977-09-01), Hafner
patent: 5002747 (1991-03-01), Le Loorer

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