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Liquid–Liquid Equilibrium of Isobutyl Acetate + Isobutyl Alcohol + Imidazolium-Based Ionic Liquids at 298.15 and 308.15 K

  • Xianglin Meng
    Xianglin Meng
    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • Xiaowei Liu
    Xiaowei Liu
    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    More by Xiaowei Liu
  • Jun Gao
    Jun Gao
    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    More by Jun Gao
  • Dongmei Xu*
    Dongmei Xu
    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    *Tel.: +86 532 86057798; E-mail: [email protected]
    More by Dongmei Xu
  • Lianzheng Zhang
    Lianzheng Zhang
    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  • , and 
  • Yinglong Wang
    Yinglong Wang
    College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Cite this: J. Chem. Eng. Data 2019, 64, 2, 778–783
Publication Date (Web):January 22, 2019
https://doi.org/10.1021/acs.jced.8b01045
Copyright © 2019 American Chemical Society

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    Abstract

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    For separation of the azeotrope isobutyl acetate and isobutyl alcohol, imidazolium-based ionic liquids 1-hexyl-3-methylimidazolium hexafluorophosphate [Hmim][PF6] and 1-octyl-3-methylimidazolium hexafluorophosphate [Omim][PF6] were applied as the extractants in the extraction process. The liquid–liquid equilibrium (LLE) data for the ternary systems isobutyl acetate + isobutyl alcohol + ([Hmim][PF6]/[Omim][PF6]) were determined at temperature of 298.15 and 308.15 K. To evaluate extraction performance of the ILs, the selectivity and distribution coefficient were calculated from the experimental data. The effect of the alkyl chain length of the cations and the temperature on the LLE for the systems were explored. In addition, the experimental LLE data were correlated by the NRTL model, and the binary interaction parameters of the NRTL model were optimized.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jced.8b01045.

    • Feed compositions (mole fraction) for the system IBAC (1) + IBA (2) + ILs (3) (PDF)

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