Abstract
Liquid–liquid equilibrium (LLE) tie-line data for 2-methyl-1-propanol+2-propanol+water were determined experimentally under atmospheric pressure over the temperature range of (298.15–348.15)K, respectively. A type 1 LLE phase diagram for the ternary system studied was got and the influence of temperature on the phase diagrams was reported, too. The Othmer–Tobias and Bachman correlations were applied to check the accuracy of the LLE data reported. Moreover, the experimental data got were regressed with the NRTL (α=0.2) and UNIQUAC activity coefficient models, meanwhile, the binary interaction parameters between each pair of components in the studied system were obtained. The root-mean-square deviation (RMSD) between the measured and calculated data was less than 0.0032. The results can be used to design and optimize the separation process of aqueous solution containing 2-propanol and 2-methyl-1-propanol.
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