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Liquid–Liquid Phase Equilibria of Binary Solutions of {1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide + 1-Butanol or 2-Methyl-1-propanol}

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Abstract

The liquid–liquid coexistence curves for the room temperature ionic liquid (RTIL) solutions of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4mim][NTf2]) in 1-butanol and 2-methyl-1-propanol have been precisely measured. The values of the critical exponent corresponding to the coexistence curve were found to be consistent with theoretical predictions of the 3D-Ising universality. The complete scaling theory was used to analyze the asymmetric behavior of the coexistence curve. The reduced consolute temperatures and the reduced consolute densities of the binary solutions of [C4mim][NTf2] and alcohols were also calculated to discuss the interactions in the RTIL solutions driving the liquid–liquid phase separations.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Projects 21373085, 21403067 and 21773063).

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  1. School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Zhiyun Chen, Doudou Liu, Yuxiao Bai, Tianxiang Yin & Weiguo Shen

  2. Department of Chemistry, Lanzhou University, Lanzhou, 730000, Gansu, China

    Weiguo Shen

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Chen, Z., Liu, D., Bai, Y. et al. Liquid–Liquid Phase Equilibria of Binary Solutions of {1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide + 1-Butanol or 2-Methyl-1-propanol}. J Solution Chem 50, 299–314 (2021). https://doi.org/10.1007/s10953-021-01053-y

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