Selective extraction of scandium from yttrium and lanthanides with amic acid-type extractant containing alkylamide and glycine moieties

Yuzo Baba, Arisa Fukami, Fukiko Kubota, Noriho Kamiya, Masahiro Goto

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The liquid-liquid extraction of rare earth metal ions (scandium (Sc3+), yttrium (Y3+) and the lanthanides (La3+, Nd3+, Eu3+ and Dy3+)) was investigated using N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]glycine (D2EHAG). Scandium was extracted selectively from lanthanides under highly acidic conditions (0 < pH ≤ 1.5), and stripped easily using a mild acidic solution such as 1 mol dm-3 H2SO4. By comparing the extraction behavior with N,N-dioctyldiglycol amic acid, which has a similar molecular structure to D2EHAG, or the commercial alkyl monocarboxylic acid extractant, Versatic 10, it was concluded that the affinity of D2EHAG to scandium was caused by a chelating effect and the size recognition ability of D2EHAG. The extraction mechanism was examined, and it was proven that the trivalent scandium ion is extracted by forming a stable metal complex with four D2EHAG molecules. This journal is

Original languageEnglish
Pages (from-to)50726-50730
Number of pages5
JournalRSC Advances
Volume4
Issue number92
DOIs
Publication statusPublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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