Thermophysical behaviour of the mixture (±)-3,7-dimethyl-1,6-octadien-3-ol with ethanol

This paper reports the experimental values of density, speed of sound and refractive index of binary mixture of (±)-linalool + ethanol at four temperatures in the range of 283.15–328.15 K and 0.1 MPa. Excess molar volume, speed of sound deviation, refractive index deviation, molar refraction, molar refraction deviation and excess isentropic compressibility are also given at the same work conditions. Afterward, prediction of speed of sound and refractive index was carried out using several theoretical models or equations. The experimental density of the binary mixture was measured at high pressure between 20 and 40 MPa in the same range of temperature. Excess molar volume, isobaric thermal expansion, and isothermal compressibility were also calculated. Peng–Robinson (PR), Patel–Teja (PT), the Statistical Associating Fluid Theory (SAFT) and the Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) were tested as predictive models of the PρT behaviour. The best predictions were obtained with the PC-SAFT equation of state (EOS).

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Thermophysical data and adequate models contribute to develop advanced processes involving natural products. ► Linalool + ethanol study: PρT (up to 40 MPa), u, nD (0.1 MPa) and related properties. ► Collision Factor (u), Lorentz–Lorenz and Gladstone–Dale (nD) give the best results. ► Peng–Robinson, Patel–Teja, SAFT and PC-SAFT were tested as predictive PρT models. ► PC-SAFT provides the best PρT predictions with an ΔAAD% of 0.43.