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How is neodymium extracted?

Neodymium magnet

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Liquid–liquid extraction

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Neodymium (Nd) extraction methods include various techniques such as trioctylphosphine oxide (TOPO) in ionic liquids for continuous extraction , pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) for stable extraction with low energy consumption , and flat sheet-supported liquid membrane (FSSLM) systems for Nd recovery and separation from other rare earth elements . Additionally, the joint extraction of Nd/Pr pair using the P507 extractant has been studied, with calculated concentration equilibrium constants and thermodynamic parameters for effective separation . Furthermore, the extractability of Nd(III) by Cyanex® 572 from nitrate solutions has been explored, highlighting the cation-exchange mechanism and the influence of factors like contact time, ion concentrations, and type of diluent on extraction efficiency . These diverse methods showcase the versatility and efficiency of different approaches in neodymium extraction.

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Open access•Journal Article•DOI Intensified Nd Extraction in Small Channels for Ndfeb Magnet Recycling Charlotte Pheasey, Panagiota Angeli - Show less +1 more 01 Dec 2022-Social Science Research Network	Neodymium is extracted from aqueous solutions using trioctylphosphine oxide (TOPO) dissolved in an ionic liquid in small channel contactors, achieving high extraction efficiencies in a short time.
Open access•Journal Article•DOI Extraction parametric pumping for separation of neodymium and praseodymium under non-stationary conditions V A Dorozhko, Mikhail A. Afonin - Show less +1 more 10 Apr 2023-Engineering Sciences	Neodymium is extracted using the P507 extractant through parametric pumping, selecting conditions for Nd/Pr separation based on concentration equilibrium constants and effective thermodynamic parameters.
Open access•DOI Mathematical Modeling of Extraction of Neodymium using Pseudo-emulsion based Hollow Fiber Strip Dispersion (PEHFSD) Prateek L. Mishra, Biswajit Swain, Anil Kumar Pabby, M. L. Singh, S. Gulati, S. Ramasubramanium - Show less +5 more 07 Nov 2021 1 Citations	Neodymium is extracted using TODGA and HNO3 in Pseudo-emulsion based Hollow Fiber Strip Dispersion (PEHFSD) technique, combining advantages of emulsion liquid membrane with improved stability.
Open access•Journal Article•DOI Extraction of neodymium(III) from aqueous solutions by solvent extraction with Cyanex® 572 Ebrahim Allahkarami, Bahram Rezai, Mohsen Bozorgmehr, Saeed Adib - Show less +3 more 26 Apr 2021-Physicochemical Problems of Mineral Processing 6 Citations	Neodymium is extracted using Cyanex® 572 through a cation-exchange mechanism, releasing three H+ ions during the process. Factors like nitrate concentration, hydrogen ion concentration, and diluent type influence extraction efficiency.

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