Journal
HYDROMETALLURGY
Volume 157, Issue -, Pages 256-260Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2015.09.004
Keywords
Heavy rare earth; HEH[EHP]; Extraction; Separation; Add-base coupling bifunctional ionic liquid
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Funding
- 'Hundreds Talents Program' from Chinese Academy of Sciences
- National Natural Science Foundation of China [21571 179]
- Science and Technology Major Project of Fujian Province
- 'Xiamen Double Hundred Plan'
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To develop sustainable and efficient separation technology for heavy rare earth elements (HREEs), the extraction of Lu(III) and neighboring HREEs using EHEHP type acid-base coupling bifunctional ionic liquid (ABC-BIL) was studied for the first time. Selectivity and stripping performances of the ABC-BIL based system were investigated. Primary mechanism of the ABC-BIL based system was indicated to be ion-association. The EHEHP type ABC-BIL contributes to avoid the saponification wastewater from HEH[EHP]. Higher extractabilities of the ABC-BIL for HREEs, i.e., Ho(III), Y(III), Er(III),Tm(III),Yb(III), and Lu(III), are pronounced advantages of the IL based extracting system than traditional HEH[EHP] system. (C) 2015 Elsevier B.V. All rights reserved.
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