Experimental data of viscosity and therefore its derivatives properties of liquid systems as a function of composition and temperature are important due to the fact that the viscosity is a property frequently used in designs of industrial processes. These properties are required in many calculations in Chemical Engineering involving fluid flow, heat and mass transfer. Acetonitrile is widely used as a reaction solvent for the production of antibiotics. It is also one of the most used solvents in the butadiene extraction. Once highly purified, it can be used as a solvent in high performance liquid chromatography. As a continuation of our study involving excess properties containing acetonitrile [1-4], in the present work, viscosities and density of binary mixture of acetonitrile + 1-propanol have been determined over the entire composition range at different temperatures and atmospheric pressure. The temperatures studied were 288.15, 293.15, 298.15, 303.15 K and 308.15 K. Viscosity and density measurements of pure liquid and mixtures were performed using a Stabinger viscometer (Anton Paar, Model SVM 3000/G2). The experimental data have been used to calculate deviation in viscosity and excess Gibbs energy of activation for viscous flow, and correlated to the Redlich-Kister equation. For the studied systems, deviation in viscosity and excess Gibbs energy of activation for viscous flow were negative over the entire composition range and become less negative with increase in temperature. The experimental viscosity results were also used to test the applicability of the empirical equations proposed by Grunberg-Nissan, Hind-McLaughlin, Katti-Chaudhri, Heric-Brewer and Van der Wyk. The results obtained are discussed in terms of alcohol self-association and cross-association between acetonitrile and 1-propanol molecules.
References
[1] S.S. Bittencourt, R.B. Torres. Volumetric properties of binary mixtures of (acetonitrile + amines) at several temperatures with application of the ERAS model. Journal of Chemical Thermodynamics, 2016. 93: p. 222-241.
[2] R.B. Torres, A.Z. Francesconi, P.L.O. Volpe. Volumetric properties of binary mixtures of acetonitrile and alcohols at different temperatures and atmospheric pressure. Journal of Molecular Liquids, 2007. 131: p. 139-144.
[3] R.B. Torres, A.Z. Francesconi, P.L.O. Volpe. Thermodynamics of binary liquid mixtures: application of the Prigogine-Flory-Patterson theory to excess molar volumes of acetonitrile + 1-alkanols systems. Journal of Molecular Liquids, 2004. 110: p. 81-85.
[4] R.B. Torres, A.Z. Francesconi, P.L.O. Volpe. Experimental study and modeling using the Eras-model of the excess molar volume of acetonitrile + 1-alkanols mixtures at different temperatures and atmospheric pressure. Fluid Phase Equilibria, 2003. v. 210: p. 287-306.
