金属イオン分離材としてのイオン液体の機能解析;金属イオン分離材としてのイオン液体の機能解析;Study on Ability of Ionic Liquids as Separation Media for Metal Ions

There has been focus on possible use of ionic liquids (ILs) as novel liquid media. Water-immiscible ILs can be used as extraction phase solvents in solvent extraction method. The hydrophobic ILs, however, are also “liquid ion-exchangers” and their nature as the extraction phase is very complicated unlike that of conventional organic solvents. This paper presents an outline of the authors’ fruits of research on possible use of the hydrophobic ILs as extraction phase solvents for the separation of metal ions, including evaluation of extracted species in IL chelate extraction, unique synergistic effects, novel extractants for the IL extraction system and triphasic extraction system using ILs.