用双三唑吡啶-硝酸溶液从TODGA-HDEHP混合有机相中反萃取241Am和152Eu试验研究  

Stripping of 241Am and 152Eu in TODGA-HDEHP Mixed Organic Phase by Hydrophilic Bistriazol Pyridine-Nitric Acid Solution

作　　者：吴芳芳 贾红伟 吕洪彬 苏哲[1] 谢书宝[1] 何辉[1] 叶国安[1] WU Fangfang;JIA Hongwei;LYU Hongbin;SU Zhe;XIE Shubao;HE Hui;YE Guoan(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《湿法冶金》2020年第3期198-202,共5页Hydrometallurgy of China

基　　金：国家自然科学基金资助重大项目(21790371)。

摘　　要：研究了以2,6-二[1-(羟丙基)-1H-1,2,3-三嗪-4-基]吡啶(PTD)的硝酸溶液为水相,从TODGA-HDEHP负载有机相中反萃取241 Am和152 Eu,考察了两相混合时间、水相初始硝酸浓度、水相PTD浓度和温度对241 Am和152 Eu反萃取的影响。结果表明:反萃取反应在5min内即达平衡;D(241 Am)和D(152 Eu)随水相HNO3浓度升高呈先降低后升高趋势,152 Eu与241 Am分离系数在硝酸浓度为0.3mol/L时达最大。斜率分析结果表明:241 Am与PTD形成1∶1和1∶2配合物,152 Eu与PTD形成1∶1配合物;PTD反萃取241 Am和152 Eu的反应均为吸热反应,152 Eu与241 Am分离系数随温度升高而升高。Hydrophilic 2,6-bis[1-(hydroxypropyl)-1H-1,2,3-triazol-4-yl]pyridine(PTD)-nitric acid solution was used to strip 241 Am and 152Eu in TODGA-HDEHP mixed organic phase using n-dodecane as diluent.The influences of contact time,initial acid concentration and PTD concentration on stripping of 241 Am and 152Eu were examined.The result show that the reaction equilibrium is achieved within 5minutes.D(241 Am)and D(152 Eu)decrease initially and then increase with increasing HNO3 concentration.The maximumf(152 Eu/241 Am)is reached at HNO3concentration of 0.3mol/L.Slope analysis show that 1∶1and 1∶2complexes are formed between 241 Am and PTD,1∶1complex is formed between 152Eu and PTD.Both stripping reactions of 241 Am and 152Eu in TODGA and HDEHP mixed organic phase are endothermic,f(152Eu/241 Am)increases with temperature rising.

关 键 词：PTD 241 AM 152 Eu 反萃取 

分 类 号：TF804.2[冶金工程—有色金属冶金] TF845