Rhodium(III) Recovery from HCl Solutions Using 4-Alkylaniline-Impregnated Resins

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  • MATSUMOTO Kazuya
    <sub>Department of Materials Science, Graduate School of Engineering Science, Akita University, </sub>
  • OHNO Sayaka
    Department of Materials Science, Faculty of Engineering Science, Akita University,
  • HATA Yuki
    <sub>Department of Materials Science, Graduate School of Engineering Science, Akita University, </sub>
  • SEZAKI Yuto
    <sub>Department of Materials Science, Graduate School of Engineering Science, Akita University, </sub>
  • JIKEI Mitsutoshi
    <sub>Department of Materials Science, Graduate School of Engineering Science, Akita University, </sub>

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<p>In this study, 4-butylaniline-impregnated resins (BuIRs) were prepared by soaking hydrophobic porous resins in aqueous solutions of 4-butylaniline hydrochloride. Rh(III) was successfully adsorbed by BuIRs from10 ppm Rh(III) solutions (6 M HCl). The quantitative desorption of Rh(III) accompanied with 4-butylaniline hydrochloride from BuIRs was also achieved by Soxhlet extraction using methanol. UV-Vis absorption measurements of Rh(III)-containing solutions showed that the equilibrium shift of Rh(III)-based species in HCl solutions is slow, and heating of the solutions is effective for equilibrating. The BuIRs obtained in this study effectively recovered the Rh(III) chloro-complex anion ([RhCl6]3－) from low Rh(III) concentration solutions, and can be useful in the Rh(III) recovery process.</p>

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