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 journalArticlepeer-review

16 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 - 2017

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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