疏水型室温离子液体用于铀酰离子的萃取研究  

Extraction of uranium from nitric acid medium by TBP in hydrophobic room-temperature ionic liquids

作　　者：刘浩[1] 黄永[1] 李宏宇[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2009年第4期194-198,共5页Uranium Mining and Metallurgy

基　　金：国家自然科学基金资助项目(50774031)

摘　　要：对磷酸三丁酯/1-辛基-3-甲基咪唑六氟磷酸盐(TBP/[C8mim][PF6])、磷酸三丁酯/1-丁基-3-甲基咪唑六氟磷酸盐(TBP/[C4mim][PF6])2个离子液体体系在萃取UO22+中的相关性质进行了研究。试验结果表明,由于[C8mim][PF6]疏水性较强,TBP在[C8mim][PF6]中对UO22+的萃取能力明显优于[C4mim][PF6],分配比随水相初始硝酸浓度的增加而提高。为了改善离子液体的萃取性能,借鉴常规铀萃取剂结构,提出了合成带有可配合铀酰离子官能团的功能专一型离子液体的研究思路。A study on the extraction of UO2＋2 from nitric acid medium by tri-n-butylphosphate（TBP） dissolved in non-traditional diluent namely 1-octyl-3-methylimidazolium hexafluorophosphate（） and 1-butyl-3-methylimidazolium hexafluorophosphate（） ionic liquids（ILs） is reported.As indicated by experiment,TBP/ demonstrated better extraction of uranium than TBP/ because of the hydrophobic effect.The distribution ratio for the extraction of UO2＋2 from nitric acid by TBP/ILs increases with increasing nitric acid concentration.On the basis of conventional extractants for UO2＋ , methods of synthesizing task-specific ionic liquids which contain uranyl ion ligating groups are proposed for enhancing the partitioning of uranyl ions into the IL from water.

关 键 词：离子液体 萃取 铀酰离子 

分 类 号：TL212.32[核科学技术—核燃料循环与材料] TQ413.29[化学工程]