伯胺N1923和三苯基氧化膦萃取金(Ⅲ)的动力学——Ⅱ.二元萃取剂体系萃取AuCl_4^-  

The Extraction Kinetics of Gold (Ⅲ) by Primaryamine N1923 and Triphenylphosphine Oxide——Ⅱ. The Extraction of AuCl_4^-in a System of Binary-extractant

作　　者：孙思修[1] 高自立[1] 沈静兰[1] 柴金岭[2] 

机构地区：[1]山东大学化学系,济南250100 [2]山东师范大学化学系,济南250014

出　　处：《化学学报》1993年第1期30-35,共6页Acta Chimica Sinica

基　　金：国家科学基金资助的课题

摘　　要：用恒界面池法研究了伯胺N1923和三苯基氧化膦(TPPO)二元萃取剂体系从盐酸介质中萃取AuCl_4^-的动力学,提出了界面化学反应控制机理。认为在界面区域内同时进行着N1923、TPPO以及二者的缔合物萃取AuCl_4^-的三个平行反应,三者的共同作用使Au(Ⅲ)向有机相的传质较N1923或TPPO的一元萃取剂体系明显加速。文中对这种动力学加速现象和动力学协同效应以及它们与热力学协同萃取的关系进行了讨论。The extraction kinetics of gold (Ⅲ) by the binary-extractant system of primary amine N1923 and tri-phenylphosphine oxide (TPPO) in chloroform from hydrochloric acid has been studied using stirred Lewis' cell at 298K. The mechanism was reported that there are three parallel reactions at the interface, i.e. extraction of gold (Ⅲ) by N1923, TPPO and their assoclated molecule respectively, which accelerate the mass transfer of gold (Ⅲ) from aqueous into organic phase obviously. A deterministic concept of kinetic synergism was presented and the relation between kinetic and thermodynamic synergism was discussed.

关 键 词：萃取动力学 协同作用 金 

分 类 号：O614.123[理学—无机化学]