Journal
JOURNAL OF RARE EARTHS
Volume 37, Issue 5, Pages 528-533Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jre.2018.07.015
Keywords
Deep eutectic solvent; Ionic liquid; Bastnasite; Rare earth metals; Solvato-metallurgy
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Funding
- Natural Sciences and Engineering Research Council of Canada through its Cooperative Research & Development Grants Program
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Dissolution in choline-chloride based deep eutectic solvents (DES) of rare earth elements (REE) from high-purity single carbonate salts of Y, La, Ce, Nd and Sm and from their multicomponent mixtures and also bastnasite mineral was assessed with a prospect to gain an understanding on the leaching behavior of bastnasite ores as REE source from DES suspensions. Urea, malonic acid and citric acid were used in different proportions with choline chloride in order to form deep eutectic solvents with desired viscosity and functionality. The results obtained prove promising for use insolvato-metallurgical processes in terms of selective dissolution of the higher-atomic-number (Z) rare earth elements at the expense of the lower-ZREEs and the gangue-originating metal impurities, thus initiating separation among the different REE members from the early hydrometallurgical steps. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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