PROCESS FOR THE SEPARATION OF RARE EARTHS BY LIQUID- LIQUID EXTRACTIONS

摘要

THE PRESENT INVENTION RELATES TO SOLVENT SEPARATION OF RARE EARTH ELEMENTS IN AQUEOUS SOLUTION. THE PROCESS OF THE INVENTION CONSISTS IN CARRYING OUT LIQUID-LIQUID EXTRACTION BETWEEN AN AQUEOUS PHASE CONTAINING NITRATES OF THE RARE EARTH ELEMENTS AND AN ORGANIC PHASE CONTAINING AN EXTRACTION AGENT COMPRISING AT LEAST ONE ORGANOPHOSPHINIC COMPOUND.