Recovery of cerium from fluoride-containing ores
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United States of America Patent
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May 4, 1993
Grant Date -
N/A
app pub date -
Sep 19, 1990
filing date -
Sep 19, 1990
priority date (Note) -
Expired
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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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