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Separation of neodymium (III) and lanthanum (III) via a flat sheet-supported liquid membrane with different extractant-acid systems

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.3390/membranes12121197
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Affiliation
  1. National Research Council of Canada
FormatText, Article
Subjectsupported liquid membrane; solvent extraction; neodymium(III); lanthanum(III); extractant
Abstract
The increasing demand for neodymium (Nd) permanent magnets in electric motors has revived research interest of Nd recovery and separation from other rare earth elements (REEs). Typically, Nd/La separation is necessary for Nd recovery from primary ores and secondary resource recycling. This research used a flat sheet-supported liquid membrane (FSSLM) with different extractant-acid systems to extract Nd from a Nd/La mixture. The recovery and separation of Nd/La with 204P-H₂SO₄, 507P-HCl, and TBP-HNO₃ were discussed. The results showed effective Nd recovery and promising Nd/La selectivity could be achieved in the 507P-HCl system, compared to 204P-H₂SO₄ and TBP-HNO₃. The addition of citric acid to the feed solution was effective for pH buffering but did not improve the Nd transport or Nd/La selectivity. Long-term stability of the 507P-HCl extractant system was demonstrated by extending the processing time from 6 h to 6 days.
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PublisherMDPI
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  • Membranes 12, no. 12 (December 2022): 1197–.
LanguageEnglish
Peer reviewedYes
Identifiermembranes12121197
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Record identifier6335a19e-d3d6-41c3-aff0-50d643b02e0b
Record created2024-03-19
Record modified2024-03-19
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