稀释剂对HEHEHP萃取Zn(Ⅱ)速率的影响及机理解释  

Effects of Diluents on the kinetics and Mechanism of Extraction ZinⅡwith HEHEHP

作　　者：杨天林[1] 

机构地区：[1]宁夏大学 化学科学与工程系,宁夏银川750021

出　　处：《固原师专学报》2000年第6期17-20,共4页Journal of Guyuan Teachers College

基　　金：国家自然科学基金(29671022)

摘　　要：研究了不同稀释剂中2—乙基己基磷酸单2—乙基己基酯(HEHEHP)萃取锌(Ⅱ)的动力学,其萃取速率在不同稀释剂中按正辛烷>环己烷>甲苯～四氯化碳>苯>氯仿>甲基异丁基酮的顺序变化,求出了表观萃取速率常数和萃取反应的活化能,并对萃取机理进行了讨论。The extraction kinetics of zinc( II )by 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester in different diluents was investigated. The results indicate that the increasing order of extraction rate in different diluents is as follows: Octane > Cyclohexane > toluene - tetrachloride > benzene > chloroform > methyl isobutylketone. The apparent rate constant and the apparent activation energy of the extraction reaction were calculated. The extrautcon mechanism was discussed too.

关 键 词：稀释剂 动力学 萃取速率 萃取机理 反应活化能 HEHEHP 锌 2-乙基己基膦酸单乙-乙基己基酯 

分 类 号：O658.2[理学—分析化学] O643.1[理学—化学]