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Separation of rare earth elements from uranium by solvent extraction and ion exchange

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Abstract

The behavior of uranyl ion and tervalent Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in the solvent extraction system: M−HCl−H2O−TBP has been studied together with chromatographic elution of the first nine of these rare earth elements using DOWEX 50Wx8 resin. >99.5% of the rare earth elements, with a single exception, remained in the aqueous phase of the solvent extraction system where the initial concentration of hydrochloric acid was between 4 and 6 M. Under these conditions uranyl ions were readily extracted by TBP. The rare earth elements were quantitatively eluted from the chromatographic column using 6M hydrochloric acid solution and the uranyl ions in a 0.75M sulfuric acid solution.

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Authors and Affiliations

  1. Departamento de Quimica, Instituto Nacional de Investigaciones Nucleares, Col. Escandon, Deleg. M. Hidalgo, Apdo. Postal 18-1027, 11801, Mexico, D. F., Mexico

    A. Sanchez-Ocampo, H. Lopez-Gonzalez & M. Jimenez-Reyes

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  1. A. Sanchez-Ocampo
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  2. H. Lopez-Gonzalez
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  3. M. Jimenez-Reyes
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Sanchez-Ocampo, A., Lopez-Gonzalez, H. & Jimenez-Reyes, M. Separation of rare earth elements from uranium by solvent extraction and ion exchange. Journal of Radioanalytical and Nuclear Chemistry Letters 154, 435–443 (1991). https://doi.org/10.1007/BF02169777

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  • DOI: https://doi.org/10.1007/BF02169777

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