Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements
| Autor: | Hiroyuki Okamura, Naoki Hirayama |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chemistry
Organic solvent 010401 analytical chemistry Inorganic chemistry Extraction (chemistry) Rare earth 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Solvent chemistry.chemical_compound Liquid–liquid extraction Ionic liquid 0210 nano-technology Solvent extraction |
| Zdroj: | Analytical Sciences. 37:119-130 |
| ISSN: | 1348-2246 0910-6340 |
| Popis: | This review summarizes recent progress in solvent extraction of rare earth elements (REEs) using an ionic liquid (IL) as the extraction solvent. These IL extraction systems are advantageous owing to the affinity of ILs for both charged and neutral hydrophobic species, in contrast to conventional organic solvent extraction systems. Herein, REE extraction studies using ILs are detailed and classified based on the type of extraction system, namely extraction using anionic ligands, extraction using neutral ligands, synergistic extraction, extraction without extractants, and a specific system using task-specific ionic liquids (TSILs). In IL extraction systems, the extracted complexes are often different from those in organic solvent systems, and the REE extraction and separation efficiencies are often significantly enhanced. Synergistic IL extraction is an effective approach to improving the extractability and separability of REEs. The development of novel TSILs suitable for IL extraction systems is also effective for REE separation. |
| Databáze: | OpenAIRE |
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