Synergistic Extraction of Trivalent Actinides by Mixtures of Thenoyltrifluoroacetone and Neutral Oxo Donors
- 1 September 1981
- journal article
- research article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 16 (8) , 957-969
- https://doi.org/10.1080/01496398108058139
Abstract
The synergistic extraction of trivalent actinides Am, Cm, Bk, and Cf has been studied by mixtures of HTTA and TOPO as well as DOSO in xylene at 30°C. HTTA-S (TOPO, DOSO) interaction corrections have been applied to calculate the “free” S concentrations in the organic phase. In the extraction of trivalent actinides, the third-power dependence on [HTTA]org at a fixed [S]org has been observed only after applying this correction. The synergistic species M(TTA)3.S and M(TTA)3.2S were found to be extracted into the organic phase whose stability constants (β1, β2, and K 2) have been evaluated. Extraction by HTTA + S(S = TOPO, DOSO, TBP, TBTP) shows the order of extraction to be Tm > Cf > Bk > Eu > Pm > Am > Cm for the trivalent ions. The Am/Cm separation factor with the synergistic mixtures is ∼3 whereas with HTTA alone it is ∼6 when they are extracted from the chloroacetate buffer.Keywords
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