Synergistic Extraction of Rare-Earth Metals and Separation of Scandium Using 2-Thenoyltrifluoroacetone and Tri-<i>n</i>-octylphosphine Oxide in an Ionic Liquid System

• Zhao Zhigang

  Department of Applied Chemistry, Graduate School of Engineering, Kyushu University

• Baba Yuzo

  Department of Applied Chemistry, Graduate School of Engineering, Kyushu University

• Kubota Fukiko

  Department of Applied Chemistry, Graduate School of Engineering, Kyushu University

• Kamiya Noriho

  Department of Applied Chemistry, Graduate School of Engineering, Kyushu University Center for Future Chemistry, Kyushu University

• Goto Masahiro

  Department of Applied Chemistry, Graduate School of Engineering, Kyushu University Center for Future Chemistry, Kyushu University

Bibliographic Information

Other Title

• Synergistic Extraction of Rare-Earth Metals and Separation of Scandium Using 2-Thenoyltrifluoroacetone and Tri-n-octylphosphine Oxide in an Ionic Liquid System
• Synergistic extraction of rare-earth metals and separation of scandium using 2-thenoyltriuoroacetone and tri-n-octylphosphine oxide in an ionic liquid system

Abstract

The synergistic extraction of rare-earth metals by a β-diketone and an organophosphine oxide is described. A combination of 2-thenoyltrifluoroacetone (HTTA) and tri-n-octyl phosphine oxide (TOPO) was found to be effective in synergistically extracting rare-earth metals into an ionic liquid (IL). The synergistic effect was strongly influenced by the diluent in which the extractants were dissolved. Extraction efficiencies for all the rare-earth metal ions were enhanced by synergy when a conventional organic solvent was used (n-dodecane). However, the synergistic effect in the IL preferentially improved the scandium extraction, leading to higher selectivity for Sc than for other rare-earth metals. Slope analysis was used to assess each extraction system, and the IL itself was found to be directly involved in the complex formation of the metal extraction system.

Journal

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 (8), 656-662, 2014

  The Society of Chemical Engineers, Japan

Keywords

• Solvent Extraction
• Synergistic Extraction
• Rare Earth Metal
• Lanthanide
• Metal Recycling

Details

• CRID: 1390001204569896832
• NII Article ID: 130004677521
• NII Book ID: AA00709658
• DOI: 10.1252/jcej.14we360
• ISSN: 18811299
• ISSN: 00219592
• NDL BIB ID: 026000791
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026000791
• Web Site: https://www.jstage.jst.go.jp/article/jcej/47/8/47_14we360/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed