Ivan Wichterle

High-pressure vapour—liquid equilibrium in systems containing carbon dioxide, 1-hexene, and n-hexane

Abstract A new equilibrium cell suitable for measurement of high-pressure vapour—liquid equilibria in systems containing components differing considerably in boiling points was constructed. Vapour—liquid equilibrium was measured in the carbon dioxide - 1-hexene - n-hexane ternary system and the two carbon dioxide binary subsystems. Measurements were carried out isothermally at temperatures 303.15 K, 313.15 K, and 323.15 K and pressures from 2 MPa to near the critical pressure (9 MPa maximum). Experimental data on the binary systems were correlated using the Soave-Redlich-Kwong and Peng-Robinson equations of state, and the reliability of calculations of vapour—liquid equilibrium in the ternary system was checked.

Vapour-liquid equilibria in the ethane - propane - n-butane system at high pressures

Abstract An equilibrium still with transparent static cell was constructed which enables the measurement of phase equilibria to be made at pressures up to the critical pressure. It was tested by vapour pressure measurement of pure n -butane within the temperature range 293–363 K. The vapour-liquid equilibria in the ethane- n -butane system were measured isothermally at 303.15, 323.15, 343.17, and 363.40 K. An interaction parameter in the mixing rule used in the Redlich-Kwong-Soave correlation method was evaluated.

Isothermal vapour–liquid equilibria for pentan-3-one+1,4- dichlorobutane, +trichloromethane, +1,1,1-trichloroethane, +1,1,2,2-tetrachloroethane binary mixtures

Abstract Isothermal vapour–liquid equilibrium data are reported for binary mixtures containing pentan-3-one with 1,4-dichlorobutane from 343.15 to 373.15 K, trichloromethane from 313.15 to 343.15 K, 1,1,1-trichloroethane from 323.15 to 353.15 K, and 1,1,2,2-tetrachloroethane from 343.15 to 373.15 K. A modified equilibrium still is described. The experimental data were correlated using the Redlich–Kister, Wilson and NRTL models by means of the maximum likelihood method.

Isothermal vapour-liquid equilibria and excess volumes in the methanol-aliphatic ether systems

Vapour-liquid equilibria were measured isothermally in the binary systems containing methanol with butyl methyl ether, tert-butyl methyl ether, ethyl propyl ether, diisopropyl ether and butyl ethyl ether. The data were correlated using the Redlich-Kister, Wilson, and NRTL equations within the accuracy of experimental errors. The excess free volumes of liquid mixtures were determined and correlated at 25 °C.

Isothermal vapour–liquid equilibria in the ternary system tert-butyl methyl ether + tert-butanol + 2,2,4-trimethylpentane and the three binary subsystems

Vapour–liquid equilibrium data are reported for the ternary tert-butyl methyl ether + tert-butanol + 2, 2, 4-trimethylpentane and the three binary tert-butyl methyl ether + tert-butanol, tert-butyl methyl ether + 2,2,4-trimethylpentane, tert-butanol + 2,2,4-trimethylpentane subsystems. The data were measured isothermally at 318.13, 328.20, and 339.28 K covering pressure range 15–100 kPa. Azeotropic data are presented for the tert-butanol + 2,2,4-trimethylpentane system. Molar excess volumes at 298.15 K are given for the three binary systems. The binary vapour– liquid equilibrium data were correlated using Wilson, NRTL, and Redlich–Kister equations; the parameters obtained were used for calculation of phase behaviour in ternary system and for subsequent comparison with experimental data.

Isothermal vapour-liquid equilibria for binary systems of chloroalkanes with heptane, toluene and methylcyclohexane at 323.15 and 333.15 K

Isothermal P, x, and y data were measured for twelve systems. Nine were binary chloroalkane + hydrocarbon systems, namely: 1-chlorobutane, 2-chlorobutane and 2-chloro-2-methylpropane with n-heptane, toluene and methylcyclohexane. Similar data were also measured for the binary systems 1-chlorobutane + 2-chlorobutane, 1-chlorobutane + 2-chloro-2-methylpropane and 2-chlorobutane + 2-chloro-2-methylpropane. The experimental data were correlated using the following five two-parameter models by means of the maximum likelihood method: 3-suffix Margules, van Laar, Wilson, NRTL (α = 1) and UNIQUAC. Vapour pressure data for 2-chlorobutane are reported.

Vapour pressures of some ethyl and propyl esters of fatty acids

Farkova, J. and Wichterle, I., 1993. Vapour pressures of some ethyl and propyl esters of fatty acids. Fluid Phase Equilibria, Vapour pressures of pure substances (ethyl methanoate, ethyl butanoate, propyl methanoate, propyl ethanoate, propyl propanoate, and propyl butanoate) in the range 10 to 100 kPa were measured. The experimental data were correlated using the Antoine equation by means of maximum likelihood method.

Vapour-liquid equilibrium in the butyl alcohol -n-decane system at 85, 100 and 115°C

Abstract Vapour-liquid equilibrium was measured isothermally in the butyl alcohol - decane system at 85, 100, and 115°C. At two lower temperatures the system exhibits azeotropic behaviour. The densities of liquid mixtures were determined at 25 °C. The data were correlated using the Margules, Wilson, and NRTL equations within the accuracy of experimental errors.

Liquid-vapour critical region of the most volatile component of a ternary system. I. Vapour-liquid equilibria in the ethane - propane - n-butane system

Abstract Uchytil, P. and Wichterle, I., 1983. Liquid-vapour critical region of the most volatile component of a ternary system. I. Vapour-liquid equilibria in the ethane - propane - n-butane system. Fluid Phase Equilibria, 15: 209–217. Vapour pressure of propane was determined within 22–95°C temperature range. Vapour-liquid equilibria in the ternary ethane - - propane - n-butane system and in the binary ethane - propane and ethane - n-butane subsystems were measured isothermally at 31.19, 32.52, and 33.89°C in the narrow concentration range (mole fraction of ethane > 0.95). The critical pressures and temperatures of these systems were determined within the same concentration region.

Vapour—liquid equilibria in the heptane—2-pentanol and heptane—2-methyl-1-butanol systems at 75, 85 and 95°C

Abstract Vapour—liquid equilibria were measured isothermally in the heptane—2-pentanol and in the heptane—2-methyl-1-butanol systems at 75, 85 and 95°C. Both the systems exhibit azeotropic behaviour. The densities of the liquid mixtures were determined at 25°C. The data were correlated using the Margules, Wilson and NRTL equations within the accuracy of experimental error.