Extraction and stripping behavior of platinum group metals using an amic-acid-type extractant

Wataru Yoshida, Yuzo Baba, Fukiko Kubota, Noriho Kamiya, Masahiro Goto

Research output: Contribution to journalArticle

9 Citations (Scopus)


The recovery and separation of platinum group metals (PGMs) are of considerable significance for metal sustainability. To establish an efficient extraction process for PGMs, the novel extractant N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl] phenylalanine (D2EHAF), containing a phenylalanine moiety as the metal-affinity group, was synthesized. The extraction of PGMs from aqueous HCl and HNO3 solutions with D2EHAF, or our previously developed N-[N,N-di(2-ethylhexyl) aminocarbonylmethyl]glycine (D2EHAG), in n-dodecane was investigated. Both D2EHAF and D2EHAG exhibited high extraction affinities for Os4+, Pt4+, and Pd2+ in aqueous HCl. In a HNO3 solution, D2EHAF extracted Pd2+ more efficiently than D2EHAG, and the extraction of Pd2+ from a 1 mol dm-3 HNO3 solution with D2EHAF proceeded quantitatively. The extracted metal ions were stripped from the organic solution using a highly acidic solution, or thiourea.

Original languageEnglish
Pages (from-to)521-526
Number of pages6
Issue number7
Publication statusPublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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