摘要
本文以正三辛基氧膦为萃取剂 ,以熔融石蜡为稀释剂 ,研究了 HCl O4-Na Cl O4介质中 La3+ 、Nd3+ 、Sm3+ 、Dy3+ 、Yb3+ 的固—液萃取行为及萃取反应热力学性能。斜率比法给出萃合物组成为 Ln( TOPO) 2 ( OH)( Cl O4) 2 。测出了萃取反应热力学参数、平衡常数及半萃取 p
The extraction behavior of Ln(Ⅲ) with trioctylphosphine Oxide(TOPO) in molten paraffin wax has been studied.The affect of pH,medium,stirring time,TOPO concentration and the amount of salts added on the distribution of Lanthanides between two phlases were investigated.Different compositions of Ln(TOPO) 2(OH)(ClO 4) 2 were determined by slope-analysis method.The equilibrium extraction constant K ex and pH 1/2 value were caculated and the thermodynamic,parameters were obtained from the dependince of K ex on the temperature.
出处
《化学研究与应用》
CAS
CSCD
2000年第4期390-393,共4页
Chemical Research and Application
基金
甘肃省自然科学基金
