Extraction of Rare-Earth Elements in Hydrofluoride Decomposition of Loparite Concentrate
- Authors: Krysenko G.F.1, Epov D.G.1, Medkov M.A.1, Sitnik P.V.2, Avramenko V.A.1,2
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Affiliations:
- Institute of Chemistry, Far-Eastern Branch
- Far-Eastern Federal University
- Issue: Vol 91, No 10 (2018)
- Pages: 1665-1670
- Section: Inorganic Synthesis and Industrial Inorganic Chemistry
- URL: https://journals.rcsi.science/1070-4272/article/view/216099
- DOI: https://doi.org/10.1134/S1070427218100142
- ID: 216099
Cite item
Abstract
Distribution and existence forms of rare-earth elements in decomposition of the loparite concentrate with ammonium hydrofluoride were studied. It was found that, in the course of the aqueous leaching of the fluorinated concentrate, rare-earth elements fully remain in the insoluble residue as complex salts of general formula NaLnF4. The process of pyrohydrolysis of the insoluble residue was examined. It was shown that varying the process conditions always results in that a NaLnF4-containing product is obtained. It was found that rare-earth elements can be extracted from the insoluble residue and separated from calcium and thorium, and the conditions for this extraction were determined.
About the authors
G. F. Krysenko
Institute of Chemistry, Far-Eastern Branch
Author for correspondence.
Email: Krisenko@ich.dvo.ru
Russian Federation, Vladivostok, 690022
D. G. Epov
Institute of Chemistry, Far-Eastern Branch
Email: Krisenko@ich.dvo.ru
Russian Federation, Vladivostok, 690022
M. A. Medkov
Institute of Chemistry, Far-Eastern Branch
Email: Krisenko@ich.dvo.ru
Russian Federation, Vladivostok, 690022
P. V. Sitnik
Far-Eastern Federal University
Email: Krisenko@ich.dvo.ru
Russian Federation, Vladivostok, 690000
V. A. Avramenko
Institute of Chemistry, Far-Eastern Branch; Far-Eastern Federal University
Email: Krisenko@ich.dvo.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690000
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