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- W2804820177 abstract "Neodymium–iron–boron (NdFeB) magnets are used in many applications, from small consumer electronics to future sustainable technologies, e.g., electric transportation and wind power. Rare earth elements (REEs) amount to about a third of the composition of NdFeB magnets. Given that REEs are presently considered critical and have very high supply risk, their recycling from end-of-life products has received increased attention. Magnet-containing streams are valuable secondary sources of REEs, e.g., neodymium, praseodymium, dysprosium, and terbium. This chapter discusses the hydrometallurgical options available for processing NdFeB magnets, whether from end-of-life applications or production residues. The need for recovering REEs from NdFeB materials and the challenges associated with this are addressed. Leaching of magnets and precipitation and solvent extraction of metal ions in the obtained leachates are discussed at length, highlighting the potential and limitations of these methods. Several steps required prior to hydrometallurgical treatment are also described, e.g., dismantling of products and hydrogen decrepitation. A literature review of the available hydrometallurgical processes to treat magnets is presented, focusing on selective and nonselective leaching, selective precipitation, solvent extraction with conventional extractants and ionic liquids, and further refining of products in solution." @default.
- W2804820177 created "2018-06-01" @default.
- W2804820177 creator A5024472187 @default.
- W2804820177 date "2018-01-01" @default.
- W2804820177 modified "2023-09-26" @default.
- W2804820177 title "Hydrometallurgy in the recycling of spent NdFeB permanent magnets" @default.
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- W2804820177 doi "https://doi.org/10.1016/b978-0-08-102057-9.00008-1" @default.
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