Experimental measurement and thermodynamic modeling of liquid–liquid equilibrium for 1-pentanol + water + NaNO3 at 298.15 and 308.15 K

Experimental measurements have been performed for liquid–liquid equilibria in aqueous systems containing 1-pentanol and sodium nitrate at temperatures of 298.15 and 308.15 K and at atmospheric pressure. The results have been modeled using the extended UNIQUAC model and also a modified version of this model. Relevant model parameters have been adjusted using the experimental data. Both models are capable of correlating the experimental data with an average deviation of less than 0.8 weight percent, with the modified model producing slightly better results. The predictive nature of the models has also been verified.

► New experimental liquid–liquid equilibrium data have been reported.
► The data have been modeled using two recent thermodynamic models.
► Performance of the models has been verified and compared.
► Relevant model parameters have been reported for the studied systems.