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<p>Solvent extraction is a widely used method for separating metals such as Th, U, and REEs. However, using excessive amounts of petroleum-derived solvents significantly increases the carbon footprint of the solvent extraction. In this study, bio-based solvents were synthesized in ester form using sorbitol and stearic acid. The extraction and separation performance of the synthesized bio-based solvents were evaluated for Th, U, and rare earth elements (REEs). Among the synthesized bio-based solvents, SSA2 demonstrated superior separation efficiency for Th compared to conventional extractants such as Cyanex 272 and D2EHPA. It exhibited distribution coefficient (K<sub>DTh</sub>) and separation factor (SF<sub>Th/REE</sub>) values of approximately 1000 and 3500, respectively.</p>

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Synthesis of bio-based solvents derived from sorbitol and stearic acid for the separation of Th, U, and REEs: a solvent extraction study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月4日

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  • Bekir Özkan,
  • Süleyman İnan

摘要

Solvent extraction is a widely used method for separating metals such as Th, U, and REEs. However, using excessive amounts of petroleum-derived solvents significantly increases the carbon footprint of the solvent extraction. In this study, bio-based solvents were synthesized in ester form using sorbitol and stearic acid. The extraction and separation performance of the synthesized bio-based solvents were evaluated for Th, U, and rare earth elements (REEs). Among the synthesized bio-based solvents, SSA2 demonstrated superior separation efficiency for Th compared to conventional extractants such as Cyanex 272 and D2EHPA. It exhibited distribution coefficient (KDTh) and separation factor (SFTh/REE) values of approximately 1000 and 3500, respectively.