Solvent Extraction of Some Lanthanides with Trioctylphosphine Oxide in Molten Paraffin Wax

作     者：Bi Wang, Xiaojun Guo, Haiyan Fan, Bo Peng, Jinzhang Gao (Department of Chemistry, Northwest Normal University, Lanzhou 730070, China Dept. of Leather Engineering, Sichuan University, Chendu 610065, China.) 

作者机构：四川大学 四川 成都 610065 西北师范大学 甘肃 兰州 730070 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2001年第20卷第1期

页      面：18-23页

核心收录：

学科分类：080603[工学-有色金属冶金] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the Natural Science Foundation of Gansu Province  China 

主　　题：lanthanides trioctylphosphine oxide extraction molten paraffin 

摘      要：The extraction behavior of Ln(III) (Ln=Nd, Sm, Tb and Yb) with trioctylphosphine oxide (TOPO) in molten paraffin wax has been studied. The effect of pH, TOPO concentration, medium, stirring time and the amount of sails added on the distribution of lanthanides between two phases were investigated. Two different compositions Ln(H2O)(t-2) (TOPO)(2)(OH)(2)NO3 (Ln=Nd and Sm) and Ln(H2O)(s-1) (TOPO)(2)(OH)(NO3)(2) (Ln=Tb and Yb) were determined by slope analysis method. The equilibrium extraction constant K-ex and pH(1/2) value were calculated and the thermodynamic parameters were obtained from the dependence of K-ex on the temperature.