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Solvent Extraction of Nickel(II) with Kelex 100 and 8-Sulfonamidoquinolines

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Abstract

Liquid-liquid extraction of Ni(II) ion by Kelex 100 and 8-sulfonamidoquinolines in chlorobenzene was studied at 25°C. The extraction equilibrium was established only slowly, requiring generally 24 h mechanical shaking. The extractants (HL) behaved as bidentate monoanionic chelating ligands, forming 1:2 (Ni2+:L-) complexes on metal extraction. The overall extraction constants (log Kexi; Kex=[NiL2]org[H+]2aq/[Ni2+]aq[HL]2org were in the order of −6 for Kelex 100 and in the range of −8–10 for 8-sulfonamidoquinolines depending on the nature of organic sulfonyl groups. A small synergistic effect by trioctylphosphine oxide, 4-benzylpyridine and 6-nitroquinoline as well as by Kelex 100 itself was observed in the extraction by Kelex 100.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Liberal Arts, Kitakyushu College of Technology, Shii, Kokuraminami, Kitakyushu, 803, Japan

    Shunsuke Ide

  2. Department of Organic Synthesis, Faculty of Engineering, Kyushu University, Hakozaki, Fukuoka, 812, Japan

    Makoto Takagi

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  1. Shunsuke Ide
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  2. Makoto Takagi
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Ide, S., Takagi, M. Solvent Extraction of Nickel(II) with Kelex 100 and 8-Sulfonamidoquinolines. ANAL. SCI. 2, 265–269 (1986). https://doi.org/10.2116/analsci.2.265

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  • DOI: https://doi.org/10.2116/analsci.2.265

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