Vapor-liquid equilibria, density and sound velocity measurements of (water or methanol or ethanol + 1,3-propanediol) binary systems at different temperatures

• VLE for water or methanol + 1,3-propanediol binary mixtures were measured.
• The investigated temperatures are 273 K–363 K.
• The NRTL, UNIQUAC and Modified UNIFAC (Do) models have been used.
• Densities and sound velocities were measured water or methanol or ethanol + 1,3-propanediol.
• The excess functions were correlated using the Redlich-Kister polynomial equation.

In this work, vapor liquid equilibria (VLE) data for the binary systems containing {water or methanol (1) + 1,3-propanediol (2)} are reported. All measurements were performed in the temperature range of (273.15–343.15 (or 363.15)) K over the whole composition range. The experimental data were correlated using the NRTL, UNIQUAC and Modified UNIFAC (Do) models. Additionally, the experimental measurements of densities and sound velocities were measured for binary systems (water or methanol or ethanol (1) + 1,3-propanediol (2)) at atmospheric pressure and at (283.15, 293.15, 303.15 and 313.15) K. The excess/deviation functions were calculated and correlated using the Redlich-Kister polynomial equation.

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