J.M. Pico

Excess enthalpies of some 2-alkanone + 1-chloroalkane binary mixtures at 25 and 35°C

Excess molar enthalpies hE at 25 and 35° C and atmospheric pressure, are reported for the binary mixtures formed by a 2-butanone and 2-pentanone with 1-chlorobutane, 1-chloropentane, 1-chlorohexane, or 1-chlorooctane. The hE values for all the mixtures are positive, increasing as the 1-chloroalkane length increases and as the ketone length decreases. Excess molar enthalpies depend slightly on the temperature. The experimental values together with those from the literature were used to calculate the interaction parameters for the Dang-Tassios version of the UNIFAC model.

Measurements and analysis of excess volumes of some alkan-2-one-1-chloroalkane mixtures using Nitta–Chao and Prigogine–Flory–Patterson models

Excess molar volumes vE at 298.15 and 308.15 K and normal atmospheric pressure for the binary mixtures butan-2-one-1-chloroalkane (from 1-chlorobutane to 1-chlorooctane) have been determined from density measurements using a vibrating tube densimeter. The vE values for all the mixtures are positive, increase as the 1-chloroalkane length increases, and are slightly dependent on the temperature. Experimental vE data are compared with theoretical predictions using the Prigogine–Flory–Patterson model with interaction parameters calculated from excess molar enthalpies measured previously in the same mixtures. These vE values, together with literature data on excess molar enthalpies and vapour–liquid equilibria, are then used to determine the interaction energies between chloro and ketone groups on the basis of the Nitta–Chao group-contribution model. These parameters may be used to predict thermodynamical properties of binary or ternary mixtures containing ketones and chloroalkanes.

Excess molar volumes of ternary mixtures {cyclohexane+n-hexane+1-chlorohexane} and {cyclohexane+n-hexane+1-hexanol} at the temperature of 298.15 K

Abstract Excess molar volumes of the ternary mixtures {x1 cyclohexane+x2 n-hexane+(1−x1−x2) 1-chlorohexane} and {x1 cyclohexane+x2 n-hexane+(1−x1−x2) 1-hexanol} were measured at the temperature 298.15 K. Excess molar volumes were determined using an Anton–Paar densimeter. All the experimental values were compared with the results obtained by empirical expressions for estimating ternary properties.

Viscosities and Densities of Solutions of n-Decane, or n-Tetradecane with Several Esters at 25°C

Viscosity and density data are reported for n-decane + propyl ethanoate, propyl propanoate, propyl butyrate, and n-tetradecane + propyl ethanoate, propyl propanoate, and propyl butyrate at 25°C and atmospheric pressure. Kinematic viscosities were determined using a capillary viscosimeter and densities were measured using vibrating-tube densimetry. The equations of Grunberg–Nissan, McAllister, Auslander, and Teja were fitted to the viscosity data. Excess molar Gibbs free energies of activation for flow were also evaluated. The experimental values obtained for excess volumes were compared with the Nitta et al. group contribution model.

Excess molar volumes of ternary mixtures of 2-butanone or 2-pentanone with 1-chloroctane + n-octane at 25°C

Excess molar volumes at 25°C of the ternary systems 2-butanone + 1 -chlorooctane + octane and 2-pentanone + 1-chlorooctane + octane and of binary mixtures 2-butanone + octane, 2-pentanone + octane, and 1-chlorooctane + octane, were determined using an Anton Paar DMA 60/602 densimeter. All the experimental values were compared with the results obtained by empirical expressions for estimating ternary properties from binary data. Variable degree polynomials were fitted to the results.