A Study on Stoichiometry of Complexes of Tributyl Phosphate and Methyl Isobutyl Ketone with Lithium in the Presence of FeCl_3  

TBP, MIBK/FeCl_3与Li形成萃合物组成的研究(英文)

作　　者：周智勇 秦炜 费维扬 李以圭 

机构地区：[1]State Key Laboratory of Chemical Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Chemical Engineering》2012年第1期36-39,共4页中国化学工程学报（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China (2008AA06Z111);the Qinghai Key Technology R&D Program (2011-J-154)

摘　　要：To study the characteristic of liquid-liquid extraction equilibrium of lithium from brine sources, the complexes formed from tributyl phosphate （TBP） and methyl isobutyl ketone （MIBK） with lithium were investi- gated using FeCl3 as coextracting agent. Liquid-liquid extraction reaction mechanisms were proposed and the stoichiometry of tetrachloroferrate（III） complex with lithium was obtained by regressing the experimental data. It is found that the stoichiometry of tetrachloroferrate（III） to lithium in the complex is 1 ： 1 with either TBP or MIBK as extractant in kerosene. The stoichiometry of the complex of TBP with Li was 1 ： 1 and that of MIBK with Li was 2 ： 1. The formed complexes of TBP and MIBK with lithium are determined to be LiFeCla-TBP and LiFeC14.2MIBK, respectively, according to the rule of neutralization.To study the characteristic of liquid-liquid extraction equilibrium of lithium from brine sources,the complexes formed from tributyl phosphate(TBP) and methyl isobutyl ketone(MIBK) with lithium were investi-gated using FeCl3 as coextracting agent.Liquid-liquid extraction reaction mechanisms were proposed and the stoichiometry of tetrachloroferrate(III) complex with lithium was obtained by regressing the experimental data.It is found that the stoichiometry of tetrachloroferrate(III) to lithium in the complex is 1︰1 with either TBP or MIBK as extractant in kerosene.The stoichiometry of the complex of TBP with Li was 1︰1 and that of MIBK with Li was 2︰1.The formed complexes of TBP and MIBK with lithium are determined to be LiFeCl4?TBP and LiFeCl4?2MIBK,respectively,according to the rule of neutralization.

关 键 词：LITHIUM extraction reaction equations formation tributyl phosphate methyl isobutyl ketone KEROSENE 

分 类 号：TQ028.32[化学工程]