METHOD OF RECOVERING CERIUM

FIELD: nonferrous metallurgy. SUBSTANCE: invention relates to reducing cerium contained in fluoride-containing ores such as bastnasite. Ore is crushed, baked, and leached with dilute hydrochloric acid to form ore concentrate. The latter is treated by hydrochloric and boric acids to dissolve cerium a...

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Bibliographische Detailangaben
1. Verfasser:	BOSSERMAN PAULA DZH
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: nonferrous metallurgy. SUBSTANCE: invention relates to reducing cerium contained in fluoride-containing ores such as bastnasite. Ore is crushed, baked, and leached with dilute hydrochloric acid to form ore concentrate. The latter is treated by hydrochloric and boric acids to dissolve cerium and convert fluoride into tetrafluoroborate ion. This ion is removed from solution, e.g. by precipitation, and solution is additionally treated to reduce cerium under conditions preventing loss of cerium in the form of insoluble cerium tetrafluoroborate. EFFECT: reduced loss of cerium under recovery operation. 56 clm