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Acetonitrile Dehydration via Extractive Distillation Using Low Transition Temperature Mixtures as Entrainers

  • Bandhana Sharma
    Bandhana Sharma
    Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
  • Neetu Singh*
    Neetu Singh
    Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
    *Phone: +91-9876019399. Fax: +91-175-2393005. E-mail: [email protected]
    More by Neetu Singh
  • Tarun Jain
    Tarun Jain
    Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
    More by Tarun Jain
  • Jai Prakash Kushwaha
    Jai Prakash Kushwaha
    Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
  • , and 
  • Parminder Singh
    Parminder Singh
    Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
Cite this: J. Chem. Eng. Data 2018, 63, 8, 2921–2930
Publication Date (Web):July 9, 2018
https://doi.org/10.1021/acs.jced.8b00228
Copyright © 2018 American Chemical Society

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    Abstract

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    Low transition temperature mixtures (LTTMs) are versatile alternatives to ILs. They share many properties with ILs, so they become a suitable choice for entrainers in extractive distillation processes. In this study, glycolic acid and choline chloride in a 3:1 molar ratio (GC3:1) were synthesized and explored as entrainers for separation of acetonitrile + water azeotropic mixtures. Isobaric vapor–liquid equilibrium data for the pseudobinary mixtures of ACN + GC3:1 and water + GC3:1 were measured at atmospheric pressure (101.32 kPa). For the pseudoternary system ACN + water + GC3:1, also VLE data were measured at different GC3:1 mole fractions of 0.05, 0.1, and 0.15. The thermodynamic modeling of these systems was performed using the nonrandom two-liquid (NRTL) model. Furthermore, a study was conducted for synthesized GC3:1 recoverability. A good agreement were found between experimental data and predicted values for these systems. Results showed that LTTM (GC3:1) eliminated the acetonitrile + water azeotrope by manipulating the relative volatility of the acetonitrile + water mixture. Therefore, LTTM (GC3:1) can be concluded as an efficient entrainer for the separation of an acetonitrile + water azeotropic mixture by extractive distillation.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jced.8b00228.

    • Table S-1, experimental isobaric VLE data for the IPA (1) + water (2) system at atmospheric pressure (101.32 kPa); Figure S1, TGA for GC3:1 from room temperature to 500 °C at atmospheric pressure (PDF)

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    Cited By

    This article is cited by 22 publications.

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    2. Antonio Tripodi, Francesco Conte, Alessandro Robbiano, Gianguido Ramis, Ilenia Rossetti. Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems. Industrial & Engineering Chemistry Research 2021, 60 (46) , 16791-16804. https://doi.org/10.1021/acs.iecr.1c02249
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