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Abstract <p>In this work, a new impregnated-type sorbent (IL-SIR) has been developed. It is manufactured using a macroporous inert support of LPS-500 styrene-divinylbenzene copolymer and an ionic liquid of methyltrioctylammonium N,N-di(2-ethylhexylamide)diglycolate ([MTOA][D2EHDGA]) as a stationary phase (extractant). The features of the isolation and separation of certain rare earth elements from nitric acid and ammonium nitrate solutions using the IL-SIR sorbent have been studied using extraction chromatography. The influence of HNO<sub>3</sub> concentration and the nature of electrolytes present in the initial solution on samarium sorption has been studied, the conditions for its desorption have been determined, and the possibility of reusing the IL-SIR sorbent after its regeneration has been assessed. Experiments on extraction-chromatographic separation of Ce/La, Sm/La, and Lu/La on IL-SIR sorbent from weakly acidic HNO<sub>3</sub> solutions have been carried out.</p>

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Extraction-Chromatographic Isolation of Rare Earth Elements from Weakly Acidic Solutions Using Sorbent Impregnated with N,N-Di(2-Ethylhexylamide)Diglicolate Methyltrioctylammonium

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • O. V. Kovalenko,
  • G. S. Tsebrikova,
  • S. S. Slobodskaia,
  • V. E. Baulin,
  • A. V. Volkov,
  • D. V. Baulin,
  • T. He,
  • A. Yu. Tsivadze

摘要

Abstract

In this work, a new impregnated-type sorbent (IL-SIR) has been developed. It is manufactured using a macroporous inert support of LPS-500 styrene-divinylbenzene copolymer and an ionic liquid of methyltrioctylammonium N,N-di(2-ethylhexylamide)diglycolate ([MTOA][D2EHDGA]) as a stationary phase (extractant). The features of the isolation and separation of certain rare earth elements from nitric acid and ammonium nitrate solutions using the IL-SIR sorbent have been studied using extraction chromatography. The influence of HNO3 concentration and the nature of electrolytes present in the initial solution on samarium sorption has been studied, the conditions for its desorption have been determined, and the possibility of reusing the IL-SIR sorbent after its regeneration has been assessed. Experiments on extraction-chromatographic separation of Ce/La, Sm/La, and Lu/La on IL-SIR sorbent from weakly acidic HNO3 solutions have been carried out.