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Extraction separation of rare-earth elements by amines in the presence of complexing agents

I. Separation of La and Sm in the presence of 2-hydroxyethylethylenediaminetriacetic acid

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Abstract

The extraction separation of La and Sm by benzyldibutylamine (BDBA) from an aqueous solution containing 6 mol·dm−3 NaNO3 and 0.5 mol·dm−3 HNO3 is not very efficient. It may remarkably be improved by addition of a complexing agent, 2-hydroxyethylethylenediaminetriacetic acid (HEDTA). The effect of preferential La extraction into the organic phase together with the effect of preferential complexation of Sm in the aqueous phase may lead, by proper choice of the complexing agent concentration, to a 7–10 fold increase in αLa/Sm values. The procedure described here enables fairly good separation of a major from minor elements.

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Authors and Affiliations

  1. Laboratory for Rare Metals Chemistry, Slovak Academy of Sciences, 043 85, Košice, (ČSFR)

    J. Kovalancik

  2. Department of Chemistry, Faculty of Metallurgy, Technical University, 043 85, Košice, (ČSFR)

    M. Galova

Authors
  1. J. Kovalancik
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  2. M. Galova
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Kovalancik, J., Galova, M. Extraction separation of rare-earth elements by amines in the presence of complexing agents. Journal of Radioanalytical and Nuclear Chemistry, Articles 162, 35–46 (1992). https://doi.org/10.1007/BF02039922

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  • DOI: https://doi.org/10.1007/BF02039922

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