Feasibility of ionic liquids as alternative separation media for industrial solvent extraction processes

被引：263

作者：

Nakashima, K ^{[1
]}

Kubota, F ^{[1
]}

Maruyama, T ^{[1
]}

Goto, M ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Appl Chem, Fukuoka 8128581, Japan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2005年 / 44卷 / 12期

关键词：

D O I：

10.1021/ie049050t

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Extraction of rare earth metals into ionic liquids (ILs) from aqueous solutions was investigated using octyl(phenyl)-N,N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) as an extractant. Use of ILs greatly enhanced the extraction efficiency and selectivity of CMPO for metal ions compared to when n-dodecane was used as the extracting solvent. The extraction mechanism has been studied by slope analysis and extraction tests, and these confirmed that the metal extraction proceeds via a cation-exchange mechanism. Furthermore, stripping of metals from ILs into an aqueous phase by complexing agents and recycling of the extracting ILs phase was successfully accomplished.

引用

页码：4368 / 4372

页数：5

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