Gao J, Hu G, Kang J, Fan H, Bai G
Department of Chemistry, Northwest Normal University, Lanzhou 730070, China.
Talanta. 1994 Apr;41(4):541-6. doi: 10.1016/0039-9140(93)e0021-5.
In this paper, liquid-liquid extraction behaviour of RE(III) (RE = La, Sm, E, Yb) by the use of 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (PMBP) in liquid paraffin with cersin has been investigated at 343.2 K. Under some conditions, the synergistic extraction behaviour with PMBP and Phen has also been studied. The slope analysis method shows that the compositions of the extracted species are REA(3) and REA(3)B. pH(1 2 ) values were also obtained. Equilibrium extraction constants and thermodynamic parameters were calculated. The results showed that increasing temperature is favourable to extraction of heavy rare earth ions with PMBP and more favourable to synergistic extraction with PMBP and Phen. Synergistic extraction can be carried out at lower pH.
本文研究了在343.2K下，1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-5（PMBP）在液体石蜡中与铈试剂对稀土（III）（RE = La、Sm、E、Yb）的液-液萃取行为。在某些条件下，还研究了其与PMBP和邻菲罗啉（Phen）的协同萃取行为。斜率分析方法表明，萃合物的组成为REA(3)和REA(3)B。同时也获得了pH(1/2)值。计算了平衡萃取常数和热力学参数。结果表明，升高温度有利于用PMBP萃取重稀土离子，更有利于与PMBP和Phen的协同萃取。协同萃取可在较低pH下进行。
