Enhanced Separation of Neodymium and Dysprosium by Nonaqueous Solvent Extraction from a Polyethylene Glycol 200 Phase Using the Neutral Extractant Cyanex 923
Brecht Dewulf, Nagaphani Kumar Batchu, Koen Binnemans
Abstract
·4L, where L is Cyanex 923. The McCabe-Thiele diagram for dysprosium extraction showed that complete extraction of this metal can be achieved by a 3-stage counter-current solvent extraction process, leaving neodymium behind in the raffinate. Finally, a conceptual flow sheet for the separation of neodymium and dysprosium including extraction, scrubbing, stripping, and regeneration steps was presented. The nonaqueous solvent extraction process presented in this paper can contribute to efficient recycling of rare earths from end-of-life neodymium-iron-boron (NdFeB) magnets.
Topics & Concepts
ChemistryDysprosiumPolyethylene glycolNeodymiumExtraction (chemistry)SolventAqueous solutionChlorideInorganic chemistryChromatographyOrganic chemistryOpticsPhysicsLaserExtraction and Separation ProcessesAdvancements in Battery MaterialsRecycling and Waste Management Techniques