HTTA和TPhPO对九种三价稀土离子的协同萃取  

Synergistic Extraction of Trivalent Rare Earth Ions with HTTA and TPhPO

作　　者：王至堂[1] 刘塔林[1] 

机构地区：[1]内蒙古大学化学系

出　　处：《稀土》1999年第1期11-14,23,共5页Chinese Rare Earths

基　　金：内蒙古自然科学基金

摘　　要：采用两相滴定法研究α－噻吩甲酰三氟丙酮（ＨＴＴＡ）和三苯基氧膦（ＴＰｈＰＯ）对九种三价稀土离子（Ｌａ，Ｃｅ，Ｅｕ，Ｔｂ，Ｄｙ，Ｈｏ，Ｅｒ，Ｙｂ，Ｙ）的协同萃取机理。在１５℃、２０℃、２５℃、３５℃四个温度下，测定了各协萃配合物的分子组成及稳定常数，进而算出协萃反应的热力学函数，并与类似的协萃体系作了比较。The synergistic extraction mechnaism of nine RE(Ⅲ) ions (La,Ce,Eu,Tb,Dy,Ho,Er,Yb,Y) with HTTA-TPhPO has been studied by using the two-phase titration method.The compositions and stability constants of synergistic complexes were determined at 15℃,20℃,25℃,35℃ respectively.The thermodynamical functions of extractive reaction were obtained,which were compared with similar synergistic systems.

关 键 词：稀土 HTTA TPhPO 协同萃取 萃取 热力学 

分 类 号：O614.33[理学—无机化学] TQ133.3[理学—化学]