A Study on Stoichiometry of Complexes of Tributyl Phosphate and Methyl Isobutyl Ketone with Lithium in the Presence of FeCl₃

详细信息    查看全文

• 作者：Zhiyong ZHOU ; Wei QIN ; ^{qinwei@tsinghua.edu.cn} ; Weiyang FEI ; Yigui LI
• 关键词：lithium ; extraction reaction equations ; formation ; tributyl phosphate ; methyl isobutyl ketone ; kerosene
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2012
• 出版时间：February, 2012
• 年：2012
• 卷：20
• 期：1
• 页码：36-39
• 全文大小：278 K

文摘

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 investigated 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 : U1 with either TBP or MIBK as extractant in kerosene. The stoichiometry of the complex of TBP with Li was 1 : U1 and that of MIBK with Li was 2 : U1. The formed complexes of TBP and MIBK with lithium are determined to be LiFeCl₄¡¤TBP and LiFeCl₄2MIBK, respectively, according to the rule of neutralization.