Distribution Behavior of U(VI), Th(IV), and Fission Products with Di(2-ethylhexyl) Isobutyramide under Process Conditions
Distribution Behavior of U(VI), Th(IV), and Fission Products with Di(2-ethylhexyl) Isobutyramide under Process Conditions
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DOI：
10.1021/ie0305566
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发表时间：
2004-06
影响因子：
4.2
通讯作者：
P. Pathak;D. R. Prabhu;A. S. Kanekar;P. Β. Ruikar;A. Bhattacharyya;P. Mohapatra;V. Manchanda
中科院分区：
文献类型：
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作者：
P. Pathak;D. R. Prabhu;A. S. Kanekar;P. Β. Ruikar;A. Bhattacharyya;P. Mohapatra;V. Manchanda
支链二(2-乙基己基)异丁酰胺 (D2EHIBA) 已被选为磷酸三正丁酯 (TBP) 的有前途的替代品，用于从辐照钍中回收 233 U。实验室批量研究以及混合沉降器研究已在 THOREX 进料条件下使用 D2EHIBA 和 TBP 进行。与 5% TBP（THOREX 溶剂）相比，使用正十二烷中的 0.5 M D2EHIBA 可以显着改善 233 U 与 Th 和裂变产物的分离。混合沉降器运行表明，0.5 M D2EHIBA 的情况下，萃余液中的铀损失和有机相中的钍吸收量低于 5% TBP 的情况。通过阳离子交换树脂对 U/Th 混合物中的铀进行最终纯化。
Branched-chain di(2-ethylhexyl) isobutyramide (D2EHIBA) has been chosen as a promising alternative to tri-n-butyl phosphate (TBP) for the recovery of 233 U from irradiated Th. Laboratory batch studies as well as mixer settler studies have been performed under THOREX feed conditions with D2EHIBA as well as with TBP. Significant improvement in the separation of 233 U from Th and fission products has been achieved by employing 0.5 M D2EHIBA in n-dodecane as compared to that of 5% TBP (the THOREX solvent). Mixer settler runs have demonstrated that loss of uranium to the raffinate and thorium uptake toward organic phase is lower in the case of 0.5 M D2EHIBA than in that of 5% TBP. Final purification of uranium from U/Th mixture has been carried out via cation-exchange resin.