(356e) Thermodynamic Properties of Binary Mixtures Containing {2-Methyltetrahydrofuran (2-MeTHF) + Alcohols at Different Temperatures

Bio-based solvents have attracted the attention of academia and industry as possible substitute for conventional molecular solvents. A sustainable chemical industry will depend on the availability of solvents obtained from renewable sources. Increasingly stringent environmental laws will require the development of green solvents that can replace conventional solvents with the same properties and characteristics. Evidently, the production of bio-based solvents should be economically viable so that these solvents can compete with those conventional compounds from the petrochemical industry. Typical examples of green solvents include ethanol, glycerol and 2-methyltetrahydrofuran (2-MeTHF). Possibly, the economy of the bio-based solvent should generate a large number of chemical intermediates resulting in the creation of so-called molecule platforms. Thermodynamic properties have been a qualitative and quantitative way to try to understand the main chemical, physical and structural phenomena present in liquid systems. In this work, new data for density, speed of sound and viscosity of binary mixtures containing {2-methyltetrahydrofuran (2-MeTHF) + ethanol, or + 1-propanol, or + 1-butanol, or + 1-pentanol} were determined over the whole composition range, in the temperature range of T = 288.15 - 303.15 K and at atmospheric pressure (p = 92.71 KPa). A commercial density and speed of sound analyzer manufactured by Anton Paar (Model DSA 5000) and operating at a frequency of 3 MHz has been used to measure the densities and speeds of sound of the pure components and their solutions. The Peltier device of the equipment made it possible to automatically keep the temperature constant at T±0.01 K. A rotational viscometer/densimeter manufactured by Anton Paar (Model Stabinger SVM 3000) was used to measure the viscosities of pure components and their solutions. From the experimental results, volumetric properties (excess molar volume, partial molar volume, apparent molar volume, partial molar excess volumes, and their infinite dilution), deviation in isentropic compressibility, deviation in viscosity, and excess Gibbs energy of activation of viscous flow, were calculated. These functions were correlated by a Redlich-Kister polynomial. It was observed that, for all studied mixtures, the deviation properties displayed negative values, what likely indicates the predominance of structural or chemical effects over the other effects present in the mixtures.