Sulfonic acids: Catalysts for the liquid-liquid extraction of metals

K. Osseo-Asare, M. E. Keeney

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

Three sulfonic acid extractants, dinonylnaphthalene sulfonic acid (HDNNS), didodecylnaphthalene sulfonic acid (HDDNS) and di-(2-ethylhexyl) sodium sulfosuccinate (Aerosol OT, AOT) are compared as to their effects on the extraction of nickel with LIX63. The acidic extractants interact synergistically with the oxime. Interfacial tension results are presented which demonstrate that the sulfonates form reversed micelles in non-polar organic solvents. It is proposed that the reversed micelles catalyze the extraction by specific solubilization of both the metal and the extractant, resulting in an increase in the interfacial concentration of the reacting species. The ability of LIX63 to chelate with nickel without deprotonating permits the synergism to occur at low pH.

Original languageEnglish (US)
Pages (from-to)999-1011
Number of pages13
JournalSeparation Science and Technology
Volume15
Issue number4
DOIs
StatePublished - May 1 1980

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Filtration and Separation

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