氨基羟基脲反萃TBP中的Np(Ⅳ)

Stripping of Np(Ⅳ) From TBP With Hydroxysemicarbazide

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。

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 mixersettler experimental result suggests that with HSC as stripping agent the decontamination factor of Np in 1BU can reach 20 in 6 stages.