Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 300, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2019.112266
Keywords
Extraction; Ionic liquids; 2,2,3,3-tetrafluoro-1-propanol; Azeotrope; Liquid-liquid equilibrium
Funding
- National Natural Science Foundation of China [21978155]
- Shandong Provincial Key Research & Development Project [2018GGX107001]
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For separating azeotropic mixture 2,2,3,3-tetrafluoro-1-propanol (TFP) and water, two kinds of imidazoliumbased ionic liquids 1-hexyl-3-methylimidazolium trifluoromethanesulfonate ([HMIM][OTf]) and 1-octyl-3-methylimidazolium trifluoromethanesulfonate ([OMIM][OTf]) were adopted to separate TFP and water. The liquid-liquid equilibrium behavior for the mixtures (water + TFP + IHMIM][OTf]) and (water + TFP + [OMINI][OTf]) were measured at temperature of 298.15 K and pressure of 101.3 kPa. The extraction ability of ([HMIM][OTf]) and ([OMIM][OTf]) was explored with partition ratio and selectivity. In the meantime, the hydrogen bond lengths, total electron density, interaction energies and deformation electron density were calculated to analyze the interactions between the ([HMIM][OTf])/([OMIM][OTf]) and (TFP/water). Also, the liquid-liquid equilibrium data was fitted by the NRTL model. (C) 2019 Elsevier B.V. All rights reserved.
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