TY - JOUR
T1 - Extraction and separation of Pt and Pd by an imidazolium-based ionic liquid combined with phosphonium chloride
AU - Kubota, Fukiko
AU - Shigyo, Eiko
AU - Yoshida, Wataru
AU - Goto, Masahiro
N1 - Funding Information:
This study was supported by a Grant-in-Aid for “High Efficiency Rare Elements Extraction Technology Area, Tohoku Innovative Materials Technology Initiatives for Reconstruction” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
PY - 2017
Y1 - 2017
N2 - Extraction and separation of Pt(IV) and Pd(II) from a hydrochloric acid solution was examined with a mixture of undiluted ionic liquids, 1-methyl-3-octylimidazolium bis(trifluoromethylsulfonyl)imide ([C8mim][Tf2N]) and trihexyltetradecylphosphonium chloride ([P6,6,6,14][Cl]). Imidazolium-based [C8mim][Tf2N] shows a high selectivity for Pt(VI), whereas [P6,6,6,14][Cl] has a high extraction ability for both Pt(IV) and Pd(II). The addition of [P6,6,6,14][Cl] to [C8mim][Tf2N] improved the extraction efficiency for Pt and the separation factor between Pt and Pd also increased. This improvement was attributed to the presence of Cl- being more hydrophilic than Tf2N- in the [C8mim][Tf2N] extraction phase. Stripping of the metals was possible with HNO3 solution without any degradation of the ionic liquid extraction phase. The ionic liquid mixture was shown to be reusable for at least five extraction cycles.
AB - Extraction and separation of Pt(IV) and Pd(II) from a hydrochloric acid solution was examined with a mixture of undiluted ionic liquids, 1-methyl-3-octylimidazolium bis(trifluoromethylsulfonyl)imide ([C8mim][Tf2N]) and trihexyltetradecylphosphonium chloride ([P6,6,6,14][Cl]). Imidazolium-based [C8mim][Tf2N] shows a high selectivity for Pt(VI), whereas [P6,6,6,14][Cl] has a high extraction ability for both Pt(IV) and Pd(II). The addition of [P6,6,6,14][Cl] to [C8mim][Tf2N] improved the extraction efficiency for Pt and the separation factor between Pt and Pd also increased. This improvement was attributed to the presence of Cl- being more hydrophilic than Tf2N- in the [C8mim][Tf2N] extraction phase. Stripping of the metals was possible with HNO3 solution without any degradation of the ionic liquid extraction phase. The ionic liquid mixture was shown to be reusable for at least five extraction cycles.
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U2 - 10.15261/serdj.24.97
DO - 10.15261/serdj.24.97
M3 - Article
AN - SCOPUS:85030321199
VL - 24
SP - 97
EP - 104
JO - Solvent Extraction Research and Development
JF - Solvent Extraction Research and Development
SN - 1341-7215
IS - 2
ER -