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1-苯基-3-甲基-4-苯甲酰吡唑啉酮-5萃取镓的研究
引用本文:杨永会,孙思修,薛梅,刘萍. 1-苯基-3-甲基-4-苯甲酰吡唑啉酮-5萃取镓的研究[J]. 化学学报, 1998, 56(6): 606-611
作者姓名:杨永会  孙思修  薛梅  刘萍
作者单位:山东大学化学学院
基金项目:国家自然科学基金资助课题(2961022)
摘    要:首次报道了1-苯基-3-甲基-4-苯甲酰吡唑啉酮-5(HPMBP)萃取镓的热力学和动力学, 指出在体系中形成Ga(PMBP)3(H2O)2萃合物, 配体PMBP既有一次溶剂化作用, 又有二次溶剂化作用, 并得到红外光谱和核磁共振谱的证实。镓的萃取过程为水相化学反应控制, 决速步骤为一次溶剂化过程: Ga^3^++HPMBP→Ga(PMBP)^2^++H^+。添加剂三辛基氧化膦(TOPO)不影响HPMBP萃取镓的分配比, 但降低了HPMBP萃取镓的正向速率, 表明动力学抑萃作用与热力学抑萃作用无对应关系。

关 键 词:红外分光光度法  核磁共振谱法  萃取  吡唑酮P    吡唑啉P  萃取动力学  
修稿时间:1996-12-20

Extraction of gallium(III) with HPMBP
YANG Yong-hui,SUN Si-Xiu,XUE Mei,LIU Ping. Extraction of gallium(III) with HPMBP[J]. Acta Chimica Sinica, 1998, 56(6): 606-611
Authors:YANG Yong-hui  SUN Si-Xiu  XUE Mei  LIU Ping
Abstract:The extraction equilibrium and kinetics of galium(III) from hydrochloric acid solutions with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5-(HPMBP) in carbon tetrachloride have been investigated. The composition of the extracted species was found to be Ga(PMBP)3.2H2O via the method of slopes, IR and NMR spectra. The values of Kex, ΔH ⅲ, ΔGⅲ and ΔSⅲ at 298K were calculated. The extraction kinetics of Ga(III) was studied with the growing drop method. The extraction rate equation can be expressed as Rf=kf[Ga^3^+][HL](o). The activation energy of the reaction was calculated to be 15.9kJ.mol^-^1. The rate determing step was deduced to take place in water phase: Ga^3^++HL→ GaL^2^++H^+, which is an immediate coordination process.
Keywords:1-phenyl-3-methyl-4-benzoyl-pyrazolone-5   gallium   extraction equalibrium   extraction kinetics  
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