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Isobaric Vapor–Liquid Equilibrium for tert-Butyl Alcohol + Water + Propane-1,3-Diol + 1-Ethyl-3-Methylimidazolium Chloride at 101.3 kPa

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Abstract

In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride ([emim]Cl) as the entrainer to separate tert-butyl alcohol (TBA) + water. We measured the isobaric vapor–liquid equilibrium (VLE) for the quaternary system TBA + water + propane-1,3-diol + [emim]Cl at 101.3 kPa, and found the VLE data to be well correlated with the nonrandom two-liquid model. These results show that the mixed solvent of propane-1,3-diol + [emim]Cl can increase the relative volatility of TBA to water and break the azeotropic point. We found no notable synergetic effect between them, and observed that the liquid mixed solvent of propane-1,3-diol and [emim]Cl had lower viscosity than [emim]Cl, which makes it a promising entrainer for separating the TBA + water azeotrope in industrial applications.

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Acknowledgements

This study was supported by the Innovation Fund of Tianjin University (No. 2010XJ-0022).

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Authors and Affiliations

  1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China

    Xianbao Cui, Qinglong Cheng, Haofei Liu, Lexing Xue, Ying Zhang, Tianyang Feng & Kai Zhang

  2. Lanzhou Petrochemical Research Center of Petrochemical Research Institute, PetroChina Co., Ltd, Lanzhou, 730060, China

    Jinbo Zhou

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  1. Xianbao Cui
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  2. Qinglong Cheng
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Correspondence to Xianbao Cui.

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Cui, X., Cheng, Q., Liu, H. et al. Isobaric Vapor–Liquid Equilibrium for tert-Butyl Alcohol + Water + Propane-1,3-Diol + 1-Ethyl-3-Methylimidazolium Chloride at 101.3 kPa. Trans. Tianjin Univ. 24, 424–433 (2018). https://doi.org/10.1007/s12209-018-0125-y

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  • DOI: https://doi.org/10.1007/s12209-018-0125-y

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