The thermodynamic properties of solutions and phase equilibria in the water-2-butanol-sodium chloride system

摘要

Fragments of the phase diagram of the H _2O-2-C _4H _9OH-NaCl system were studied experiment- tally at 298 and 313 K. The thermodynamic properties of sodium chloride in three-component solutions with ionic strengths up to 1.9 mol/kg and alcohol content in the solvent 4.97 and 10 wt % were measured at 298 and 323 K by the electromotive force method with ion-selective electrodes. The eNRTL (electrolyte Non-Random Two-Liquids) model parameters correctly describing the results of electrochemical measurements of the partial properties of NaCl and phase equilibria in the water-2-butanol- sodium chloride ternary system and binary subsystems constituting it were determined. The isothermal sections of the phase diagram of the H _2O-2-C _4H _9OH-NaCl system were calculated using the method of convex hulls implemented in the TernAPI package.