甲醇-水混合溶液中HPMBP对RE^(3+)的萃取机理研究  

Study on the Extraction Mechanism of RE^(3+) by HPMBP from Methanol-Water Mixed Solutions

作　　者：孔晓朵[1] 张秀英[1] 

机构地区：[1]河南师范大学化学与环境科学学院

出　　处：《河南师范大学学报（自然科学版）》2007年第1期118-121,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：河南省自然科学基金(0511022000)

摘　　要：研究了在甲醇-水混合溶液中,HPMBP(1-苯基-3-甲基-4-苯甲酰基吡唑酮-5)的氯仿溶液对稀土离子RE3+(Nd3+、Eu3+、Ho3+)的萃取机理,利用斜率法并借助红外(IR)光谱分析、元素分析、热分析(DT-DTA)等手段对萃取条件下制备的萃合物的组成进行了表征.实验证明:在RE3+(~10-4mol.L-1)/HNO3NaNO3CH3OH-H2O/HPMBP-CHCl3体系中,由于甲醇取代水分子参与配位,形成疏水性较强的加合物RE(PMBP)3.2CH3OH产生正协同效应,使lgD由-0.403提高到0.688,萃取分配比明显提高.The extraction mechanism of rare earth ions RE^3＋ （Nd^3＋ , Eu^3＋ , Ho^3＋ ） from methanol-water mixed solution by HPMBP（ 1 - phenyl - 3 - methyl- 4 - benzoyl - pyrazolone- 5 ） in chloroform has been investigated. Furthermore, the extraction complexes have been synthesized and characterized by means of Slop Analysis and IR, Elementary Analysis, TG-DTA. All the results indicated： in the RE^3＋ （～10-4 mol · L^-1 ）/HNO3 NaNO3 CH3OH-H2O / HPMBP-CHCl3 systems, methanol had a positive synergistic effect caused by formation of adduct complex RE（PMBP）3 · 2CH3 OH, thus the data of lgD was increased from -0. 403 to 0. 688, remarkably increased the extraction ratio.

关 键 词：HPMBP 甲醇 萃取机理 萃合物 

分 类 号：O614.32[理学—无机化学]