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

Kazunori Nakashima; Fukiko Kubota; Tatsuo Maruyama; Masahiro Goto

doi:10.1021/ie049050t

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

Kazunori Nakashima, Fukiko Kubota, Tatsuo Maruyama, Masahiro Goto

Research output: Contribution to journal › Article › peer-review

276 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4368-4372
Number of pages	5
Journal	Industrial and Engineering Chemistry Research
Volume	44
Issue number	12
DOIs	https://doi.org/10.1021/ie049050t
Publication status	Published - 2005 Jun 8
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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10.1021/ie049050t

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abstract = "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.",

author = "Kazunori Nakashima and Fukiko Kubota and Tatsuo Maruyama and Masahiro Goto",

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T1 - Feasibility of ionic liquids as alternative separation media for industrial solvent extraction processes

AU - Nakashima, Kazunori

AU - Kubota, Fukiko

AU - Maruyama, Tatsuo

AU - Goto, Masahiro

PY - 2005/6/8

Y1 - 2005/6/8

N2 - 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.

AB - 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.

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JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

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

Abstract

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