1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮和磷酸三丁脂协同萃取镭的研究

用1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮(PMBP)为萃取剂，苯为稀释剂，从pH5的水相中萃取^224Ra，发现^224Ra的萃取效率非常低。若往PMBP中加入少量的磷酸三丁脂(TBP)，则会极大地提高镭的萃取效率，这说明TBP对PMBP萃取镭有显著的协同萃取效应。完成了萃取时间和反萃时间对^224Ra萃取效率的影响以及^224Ra萃取效率与TBP量之间的依赖关系等条件实验。

Studies on Synergistic Extraction of 224Ra with PMBP and TBP

The solvent extraction behavior of 224Ra was studied at pH5 using a 0. 1 mol/L solution of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) in benzene. It was found that the extraction of 224Ra was not sufficiently effective under such a condition. If small amount of TBP was added into the solution of PMBP-benzene the extraction efficiency of 224Ra increases considerably. It demonstrates that TBP has strong synergistic extraction effect for radium. The experimental data on the effect of the equilibrium time on the extraction of 224Ra in the extraction and striping as well as the dependence of 224Ra percept extraction on amount of TBP were obtained.