摘要
本文用严格而简洁的方法导出用两相滴定法研究螯合萃取和协同萃取机理的理论公式。用两相滴定法研究了1-苯基-3-甲基-4-苯甲酰基吡唑啉酮-5(HPZL)的苯溶液对锌离子的萃取机理以及HPZL和TBP(磷酸三丁酯)的苯溶液对锌离子的协同萃取机理,证明这个方法得到的结果是可靠的。对两相滴定法的优缺点和适用范围进行了讨论。
The method of two-phase titrations was first suggested by D.Dyrssen(1952)and B.S.Jensen(1959).In the present investigation we have extended the method to the study of mechanism of chelate and synergistic extraction and for the determination of stability constants of mixed ligand complexes of the following type:Mn++nA-+j(HA)(a)+kB(o)=MAn(HA)j(B)k(o)βnjk=(MAn(HA)j(B)k)o/(Mn+)(A-)n(HA)of(B)koand we have offered a new and rigorous derivation of the theoretical formulas necessary for the evaluation ofβnjk,The method was applied to the study of the mechaniam of chelate and synergistic extraction of zinc ion with l-pheny-3-methyl-4-benzoyl-pyrazolone(HPZL)and TBP in benzene.The results and the scope of applicability of the two-phase titration method were discussed.
作者
黎乐民
徐光宪
Li Lemin(Li Lo-min);Xu Guangxian(Hsu Kwang-hsien)(Department of Chemistry,Beijing University,Beijing)
出处
《高等学校化学学报》
SCIE
EI
CAS
1981年第1期12-24,共13页
Chemical Journal of Chinese Universities
