Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Rare earth elements (REEs) are becoming more and significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or secondary sources, has become necessary, including recovery mine tailings, recycling end-of-life products urban industrial waste. Ionic solvents, ionic liquids (ILs) deep-eutectic solvents (DESs), have attracted much attention since represent an alternative to conventional metal recovery. These systems used reactive agents leaching extraction processes. The most studies reported last decade regarding REEs presented this review.