氨基羟基脲反萃TBP中的Np(Ⅳ)

Stripping of Np(Ⅳ) From TBP With Hydroxysemicarbazide

摘要: 为有效提高铀中除镎的分离效果，对氨基羟基脲反萃30%TBP-煤油中Np(Ⅳ)的性能进行了研究，探讨了反萃剂浓度、酸度、温度、反萃时间、相比、有机相铀浓度对Np(Ⅳ)反萃率的影响。单级研究结果表明，氨基羟基脲能有效反萃TBP中Np(Ⅳ)。使用氨基羟基脲为反萃剂的台架实验结果表明，6级反萃对1BU中Np的净化系数为20。

Abstract: The application of hydroxysemicarbazide (HSC) as a stripping agent of Np(Ⅳ) for the improvement of U-Np separation is studied. The effect of varying stripping agent concentration, nitric acid concentration, temperature, contacting time, phase ratio and U concentration in TBP on stripping ratio of Np(Ⅳ) is investigated detailedly. The single stage experimental results show that HSC can strip Np(Ⅳ) from TBP effectively. The mixer-settler experimental result suggests that with HSC as stripping agent the decontamination factor of Np in 1BU can reach 20 in 6 stages.