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Extraction behavior of yttriuí with diisodecylphosphoric acid from nitric acid solution

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Abstract

Extraction of yttrium and some of the lanthanoids by diisodecylphosphoric acid (DIDPA) has been studied as a function of nitric acid concentration in the aqueous phase and concentration of the DIDPA in n-dodecane. The distribution ratio of yttrium was found to increase with the second power of concentration of the extractant and decrease with the third power of concentration of nitric acid. As the concentration of yttrium in the organic phase increased, an amorphous solid was found to precipitate and the composition of the solid was determined to be Y(DIDP)3. To dissolve Y(DIDP)3 into n-dodecane, a 14-fold molar excess of DIDPA was required over Y(DIDP)3. The distribution ratio of yttrium was found to be too high to back-extract this element by nitric acid of medium concentration.

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  1. Department of Chemistry, Japan Atomic Energy Research Institute, Tokai, Ibaraki, (Japan)

    T. Sato

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  1. T. Sato
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Sato, T. Extraction behavior of yttriuí with diisodecylphosphoric acid from nitric acid solution. Journal of Radioanalytical and Nuclear Chemistry, Articles 158, 391–399 (1992). https://doi.org/10.1007/BF02047124

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  • DOI: https://doi.org/10.1007/BF02047124

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