Abstract
Binodal data for ethanol, 2-propanol and 1-propanol+magnesium sulfate/zinc sulfate+water systems were experimentally determined at (303.15 and 313.15)K, respectively. An empirical equation was used to correlate binodal data. The liquid–liquid equilibrium data for part of the investigated systems were obtained via the MATLAB. In order to evaluate the dependability of the calculation method and the tie-line data, the liquid–liquid equilibrium data were correlated by the Othmer–Tobias and Bancroft equations. The salting-out abilities of the investigated salts and the phase-forming abilities of the investigated hydrophilic alcohols were discussed by the effective excluded volume (EEV) of salt. The salting-out abilities of the investigated salts follow the order ZnSO4>MgSO4, which can be indicated by the location of the binodal curves plotted in molality and the salting-out coefficient. In addition, the phase-forming abilities of the investigated hydrophilic alcohols follow the order: 1-propanol>2-propanol>ethanol.
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