Vapor−Liquid Equilibrium Measurements for Tetraethyl Orthosilicate + Ethanol at 24.00 kPa and 53.32 kPa

Abstract

The isobaric vapor-liquid equilibrium data of the tetraethyl orthosilicate and ethanol binary mixture were collected using a modified Othmer still at pressures of 24.00 kPa and 53.32 kPa. The experimental data showed that this mixture could be separated by a distillation process at lower temperatures under pressures of 24.00 kPa and 53.32 kPa than under atmospheric pressure. The experimental data were examined with the Herington thermodynamic consistency test and the χ 2 distribution of statistics. They are fairly well correlated with the UNIQUAC model. Also, the optimum interaction parameters of the UNIQUAC model were determined by the maximum likelihood principle.

Isobaric Vapor–Liquid Equilibrium Data for the Binary Mixtures 2-Methyl Propan-2-ol with Tetraethoxysilane and 1-Phenyl Ethanone at 95.5 kPa

“…The saturated vapor pressures are calculated using Antoine's equation given as ln ( P i sat / mmHg ) = italicA italici − italicB italici / false[ ( T / K ) + C i ] The Antoine constants ( A , B , C ) are obtained from literature , and are given in Table .…”

Vapor Pressure Measurements for 2-Chloromethylbenzoxazole and Vapor−Liquid Equilibrium Measurements for the Chlorobenzene + 2-Chloromethylbenzoxazole System

“…Vapor pressures were measured by the boiling point method. 3 The apparatus for vapor pressure measurement used here is similar to that of Huang et al 4 Temperatures were measured with thermocouples with an uncertainty of ( 0.05 K, and the still pressure was controlled at the desired value by a U-tube mercury manometer with an uncertainty of ( 0.03 kPa. The U-tube mercury manometer and thermometers were calibrated before experimental measurements.…”

“…Both vapor and liquid phases were kept at the same temperature for more than 1 h. VLE Measurement. The equipment and procedure for the measurement of low-pressure VLE are nearly the same as the one used by Huang et al 4 The equipment is a recirculation type, in which vapor is continuously recirculation. The thermocouples with an uncertainty of ( 0.1 K were used here, and the manometer was the same as the one used in the measurement of the vapor pressure of 2-chloromethylbenzoxazole.…”

Vapor−Liquid Equilibrium for the Binary System ofN,N-Dimethylaniline with 2-Amino-3-methylpyridine

“…The equipment and procedure for the measurement of low-pressure VLE are nearly the same as the ones described in the literature. 8,9 The apparatus mainly consists of a boiling chamber and a condenser. The total volume of the boiling chamber is about 400 cm 3 .…”