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Abstract <p>Extraction of actinides and lanthanides from nitric acid media with 4-(di-<Emphasis Type="ItalicUnderline">n</Emphasis>-alkylphosphoryl)-4-methylpentan-2-one derivatives with different lengths of alkyl substituents at the phosphorus atom [hexyl (C6), octyl (C8), and decyl (C10)] was studied. High selectivity was demonstrated in the extractive separation of uranium(VI), thorium(IV), and rare earth elements (REEs) with the separation factor for U(VI) and the sum of REEs SF<sub>U(VI)/ΣREE</sub> &gt; 4500 and for thorium(IV) and the sum of REEs SF<sub>Th(IV)/ΣREE</sub> &gt; 5000. The influence of alkyl radicals at the phosphorus atom on the extraction capacity for <i>f</i>-elements was shown. The extraction capacity increases in the series C6 &lt; C8 &lt; C10. Isotherms of uranium(VI) and thorium(IV) extraction with γ-(dialkylphosphoryl) ketones C6, C8 and C10 were obtained.</p>

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Extraction of Actinides and Lanthanides from Nitric Acid Media with Alkylated Phosphoryl Ketones

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. M. Safiulina,
  • A. V. Lizunov,
  • N. E. Borisova,
  • A. V. Golubev,
  • D. A. Tatarinov,
  • V. F. Mironov,
  • I. G. Tananaev

摘要

Abstract

Extraction of actinides and lanthanides from nitric acid media with 4-(di-n-alkylphosphoryl)-4-methylpentan-2-one derivatives with different lengths of alkyl substituents at the phosphorus atom [hexyl (C6), octyl (C8), and decyl (C10)] was studied. High selectivity was demonstrated in the extractive separation of uranium(VI), thorium(IV), and rare earth elements (REEs) with the separation factor for U(VI) and the sum of REEs SFU(VI)/ΣREE > 4500 and for thorium(IV) and the sum of REEs SFTh(IV)/ΣREE > 5000. The influence of alkyl radicals at the phosphorus atom on the extraction capacity for f-elements was shown. The extraction capacity increases in the series C6 < C8 < C10. Isotherms of uranium(VI) and thorium(IV) extraction with γ-(dialkylphosphoryl) ketones C6, C8 and C10 were obtained.