Abstract
The liquid–liquid equilibria data of water (1)+2-propanol (2)+[bmim][Tf2N] (3) and water (1)+2-propanol (2)+[bmp][Tf2N] (3) at 283.2, 303.2 and 323.2K and atmospheric pressure were measured with the objective of understanding the behavior of these two systems and to try to improve the extraction of 2-propanol from water from economical and environmental points of view. The thermodynamic parameters were determined using the non-random two-liquid (NRTL) and universal quasichemical (UNIQUAC) models, and excellent results were achieved in both cases (the maximum root-mean-square deviation was 0.433%). Lastly, the capability of the two ionic liquids to separate 2-propanol from the aqueous mixture was studied and compared with the capabilities of other bis(trifluoromethylsulfonyl)imide-based ionic liquids from the literature.
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