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The only current industrial technology used in the world for rare earth (RE) separation is solvent extraction (SX) initially developed during the 1960s. After almost 30 years of inactivity in the field of RE processes and following the RE crisis in the 2010s work on RE separation has been reactivated in the Western world. Several teams began working on alternative technologies to solvent extraction in part because SX was considered as a Chinese technology. The promoters of these alternative technologies criticize SX for leading to high CAPEX and OPEX, having a high carbon footprint, and being inflexible. The combination between a large pallet of aqueous and organic chemistries and artificial intelligence allows to significantly decrease the OPEX and the environmental footprint of SX while improving its flexibility toward the variability of the RE feedstocks.

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Improvements in Rare Earth Separation

  • 会议论文

  • 发表日期：

    2025年

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  • Alain Rollat,
  • Clémence Bertuol,
  • Alain Lévêque

摘要

The only current industrial technology used in the world for rare earth (RE) separation is solvent extraction (SX) initially developed during the 1960s. After almost 30 years of inactivity in the field of RE processes and following the RE crisis in the 2010s work on RE separation has been reactivated in the Western world. Several teams began working on alternative technologies to solvent extraction in part because SX was considered as a Chinese technology. The promoters of these alternative technologies criticize SX for leading to high CAPEX and OPEX, having a high carbon footprint, and being inflexible. The combination between a large pallet of aqueous and organic chemistries and artificial intelligence allows to significantly decrease the OPEX and the environmental footprint of SX while improving its flexibility toward the variability of the RE feedstocks.