Intermolecular interactions in soybean oil + different organic solvents by ultrasonic velocity measurements Original Research Article

Ultrasonic velocity measurement is a reliable procedure that allows a quick and easy determination of solvent concentrations in the micelle structures that appear in oil technology, as well as a theoretical analysis to understand the solvation process. This paper presents data of ultrasonic velocities and isentropic compressibilities of mixtures enclosing soybean oil and different solvents such as short aliphatic alkanols (methanol, ethanol, 1-propanol, 2-propanol, and 1-butanol), aliphatic alkanes (n-hexane, n-heptane, n-octane and n-nonane) and esters (ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate and vinyl acetate) that have been measured at 298.15 K and atmospheric pressure. The values of these properties were calculated over the whole range of homogeneous composition, phase separation appearing in rich solvent mixtures of short aliphatic alcohols (methanol, ethanol or 2-propanol). Different acoustic magnitudes were calculated because of its importance in the study of specific molecular interactions and in theoretical calculations providing information about the extent to which the solvation layer around triglyceride molecules can be altered and the coordination of solvent molecules displaced. Theoretically computed values of the isentropic compressibility in these mixtures using different models indicate the superiority of the most complex procedures.