Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements
Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements
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DOI：
10.2116/analsci.20sar11
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发表时间：
2020-10
影响因子：
1.6
通讯作者：
H. Okamura;N. Hirayama
中科院分区：
文献类型：
--
作者：
H. Okamura;N. Hirayama
这篇综述总结了使用离子液体（IL）作为提取溶剂的稀土元素（REE）溶剂提取（REE）的最新进展。与常规的有机溶剂提取系统相比，由于IL对带电和中性疏水性物种的亲密关系，这些IL提取系统是有利的。本文中，使用IL的REE提取研究是根据提取系统的类型进行详细详细介绍和分类的，即使用阴离子配体提取，使用中性配体提取，具有中性配体，协同提取，没有提取物的提取物以及使用特定任务特异性离子液体（TSILS）的特定系统提取。 。在IL提取系统中，提取的复合物通常与有机溶剂系统中的复合物不同，而REE提取和分离效率通常显着提高。协同IL提取是提高REE的可萃取性和可分离性的有效方法。适用于IL提取系统的新型TSIL的发展也有效地分离了REE。
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.