摘要
1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮(HPMBP)与8-羟基喹啉(HOx)的苯溶液在硝酸介质中对La^(3+)有明显的协同萃取效应。对形成的三元配合物进行组成测定及元素分析,证实协萃配合物的组成为La(PMBP)_3·2Ox,萃取表观平衡常数为:β_(30)=1.26×10^(-2),β_(32)=3.80×10^(-2)。探讨了协萃机理,提出了协萃配合物的两种可能结构。
The extraction of lanthanum(Ⅲ) from nitric acid into mixture of HPMBP and HOx in benzene has been studied. The extraction coefficients have been found to be greater for such mixture than for either component alone. The formula of the extraction species is La(PMBP)3·2Ox and the equilibrium constants are: β_(30)=1.26×10^(-2), β_(32)=3.80×10^(-2).
关键词
镧
协同萃取
吡唑啉酮
羟基喹啉
Lanthanum
Synegistic extraction
1-Phenyl-3-methyl-4-benzoyl-5- pyrazolone
8-Hydroxyquinoline
