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 journalArticle

234 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 languageEnglish
Pages (from-to)4368-4372
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume44
Issue number12
DOIs
Publication statusPublished - Jun 8 2005

Fingerprint

Ionic Liquids
Solvent extraction
Ionic liquids
phosphine
metal
Rare Earth Metals
Metals
oxide
Oxides
Rare earths
Metal ions
Cations
Recycling
ion exchange
Ion exchange
rare earth element
recycling
aqueous solution
Positive ions
ionic liquid

All Science Journal Classification (ASJC) codes

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

Cite this

Feasibility of ionic liquids as alternative separation media for industrial solvent extraction processes. / Nakashima, Kazunori; Kubota, Fukiko; Maruyama, Tatsuo; Goto, Masahiro.

In: Industrial and Engineering Chemistry Research, Vol. 44, No. 12, 08.06.2005, p. 4368-4372.

Research output: Contribution to journalArticle

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