The application of N,N-dimethylhydroxylamine as reductant for the separation of plutonium from uranium

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• 作者：Jinping Liu (1)
  Hui He (1) hehui@ciae.ac.cn
  Hongbin Tang (1)
  Yanxin Chen (1)
• 关键词：Plutonium &#8211 ; Uranium &#8211 ; N ; N ; Dimethylhydroxylamine &#8211 ; Methylhydrozine &#8211 ; Reductive stripping
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版时间：May 2011
• 出版年：2011
• 期刊代码：48_02365731
• 类别：ch
• 卷：288
• 期：2
• 页码：351-356
• 数据来源：sp

摘要

Both single stage and multi-stages experiments on stripping plutonium with N,N-dimethylhydroxylamine (DMHAN) as reductant with methylhydrozine (MMH) as supporting reductant were carried out. The effect of contact time, temperature, acidity, concentration of DMHAN on back-extraction rate of plutonium was investigated in the single stage experiment. The results demonstrated that the reaction of stripping Pu(IV) in the organic phase (30%TBP–kerosene) 1BF solutions by DMHAN exhibits excellent stripping efficiency. Under the given conditions, the back-extraction rate of plutonium reaches 90%within 2 min. Higher temperature, lower acidity and the increased concentration of DMHAN benifit the stripping reaction. The concentration profile of HNO₃, uranium and plutonium were determined in a multi-stages mixer-settler after the steady state of the back-extraction, and the multi-stages results show that the plutonium can be separated effectively from uranium. The recovery of plutonium and uranium reach 99.995%or over 99.99%respectively. The separation factor of U from Pu (SF_Pu/U) is about 2 脳 104.