Extracting Yttrium, Lanthanum, and Europium with Phosphine Oxides of the Hexyl–Octyl Series
V. V. Tumanov, P. A. Storozhenko, K. D. Magdeev, V. I. Shiryaev
Российский журнал физической химии А
https://doi.org/10.1134/S0036024422060279
Samples of mono- and different radical phosphine oxides of the hexyl–octyl series are synthesized according to Grignard and their composition is determined. The extraction of yttrium, lanthanum, and europium from nitric acid media both individually and upon co-presence is studied. The order of change in the extraction properties of alkylphosphine oxides for individual rare-earth metals (REMs) is obtained. The highest percentage of REM extraction is achieved at a nitric acid concentration of ~0.5 M in the aqueous phase. The percentages of individual REM extraction under these conditions are determined to be 90–97% for yttrium, 75–91% for lanthanum, and 93–98% for europium. The percentages of combined extraction were 68–82, 45–62, and 80–88%, respectively. The data suggest that REMs of the yttrium group can be separated from those of the cerium group, and this can be used in preparing pure REMs.
- State Research Institute of the Chemistry and Technology of Organoelement Compounds, 105118, Moscow, RussiaV. V. Tumanov, P. A. Storozhenko, K. D. Magdeev & V. I. Shiryaev
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