L. Segade

Viscosity deviations of ternary mixtures di-n-butyl ether + 1-propanol + n-octane at several temperatures

Abstract Viscosities and densities of {x1 di-n-butyl ether+x2 1-propanol+(1−x1−x2) n-octane} and their corresponding binary mixtures were measured at the temperatures of 293.15, 298.15, 303.15 and 308.15 K under atmospheric pressure. Kinematic viscosities were determined using a capillary viscosimeter, and densities were measured by a vibrating tube densimeter. The viscosity deviations and Gibbs free energies of activation for flow were evaluated. All the experimental values were compared with the results obtained with different predictive methods.

Viscosities and Densities for the 1-Propanol + n-Heptane System at Several Temperatures

Viscosities and densities have been measured for 1-propanol + n-heptane at 20, 25, 30, and 35°C and atmospheric pressure. Kinematic viscosities were determined using a capillary viscosimeter; densities were measured using vibrating-tube densimetry. The viscosity deviations were evaluated. Viscosity results were fitted to the equations of Grunberg–Nissan, McAllister, Auslander, and Teja. The experimental excess molar volumes were compared with the results obtained with the Nitta–Chao model.

Densities, surface tensions, and refractive indexes of propyl propanoate + hexane + m-xylene at 298.15 K

This paper reports experimental densities, surface tensions, and refractive indexes of the ternary system (propyl propanoate + hexane + m-xylene) at the temperature 298.15 K and atmospheric pressure over the whole composition range. Also, the corresponding binary mixtures not published before are presented. The excess molar volumes, surface tension deviations, and changes in the refractive index on mixing have been calculated. Finally, we will compare the experimental data of surface tension and refractive index with different theoretical and empirical approximations.

Excess molar enthalpies for di-n-butyl ether + 1-propanol + n-octane at 298.15 K

Abstract Excess molar enthalpies, H m E , at 298.15 K and atmospheric pressure were measured for x 1 (CH 3 (CH 2 ) 3 ) 2 O + x 2 CH 3 (CH 2 ) 2 OH + (1 − x 1 − x 2 ) CH 3 (CH 2 ) 6 CH 3 and the corresponding binary mixtures, with a Calvet microcalorimeter. The H m E values for all the mixtures were positive. Variable-degree polynomials have been fitted to the results.

Excess molar volumes of ternary mixtures of di-n-butylether + 1-heptanol + n-octane at the temperature of 298.15 K

Abstract Excess molar volumes of the ternary mixture {x1 di-n-butylether+x2 1-heptanol+(1−x1−x2) n-octane} and the corresponding binary mixtures were measured at the temperature 298.15 K. Excess molar volumes were determined using an Anton Paar densimeter. The experimental values were compared with the results obtained with some empirical methods for the estimation of ternary properties from binary results.

Excess molar volumes of ternary mixtures di-n-butyl ether + 1-pentanol + n-octane at 298.15 K

Abstract Excess molar volumes at 298.15 K and atmospheric pressure were measured for x1 (CH3(CH2)2O + x2 (CH3(CH2)4)OH + (1 − x1 − x2 CH3(CH2)6CH3 and the corresonding binary mixtures, with an Anton Paar densimeter. All the experimental values were compared with the results obtained by different prediction methods.

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 enthalpies for di-n-butylether+1-propanol+n-decane at 298.15 and 308.15 K

Excess molar enthalpies, H E m at 298.15 and 308.15 K and atmospheric pressure were measured for (x 1 di-n-butylether + x 2 1-propanol + (1 - x 1 - x 2 ) n-decane} and for their corresponding binary mixtures with a Calvet microcalorimeter. The experimental results were compared with those calculated by using the Nitta-Chao and UNIFAC models. Experimental values were also used to test empirical expressions for estimating ternary properties from binary results. Variable-degree polynomials have been fitted to the results.

Excess molar enthalpies of the ternary system (propyl propanoate+1-hexanol+n-hexane) at 298.15 K

Excess molar enthalpies at the temperature 298.15 K of {x 1 C 2 H 5 CO 2 (CH 2 ) 2 CH 3 +x 2 CH 2 OH(CH 2 ) 4 CH 3 +x 3 CH 3 (CH 2 ) 4 CH 3 } and of the binary mixtures {x 1 C 2 H 5 CO 2 (CH 2 ) 2 CH 3 +x 2 CH 2 OH(CH 2 ) 4 CH 3 } and {x 1 CH 2 OH(CH 2 ) 4 CH 3 + x 2 CH 3 (CH 2 ) 4 CH 3 } were determined using a Calvet microcalorimeter. Ternary experimental values were compared with the predictions of UNIFAC (versions of Tassios and Larsen) and Nitta-Chao group prediction models, and were also used to test several empirical expressions for estimating ternary properties from binary results. Variable degree polynomials have been fitted to the results.