An equipment for dynamic measurements of vapour–liquid equilibria and results in binary systems containing cyclohexylamine

Measurement and Prediction of Vapor–Liquid(−Liquid) Equilibria in Ternary Systems Containing Water, an Organic Component, and Cyclohexanol

“…Experimental Procedure and Analytical Methods. The measurement equipment has been described in detail by Grenner et al 6 The isothermal VLE measurements were carried out in a modified Rock and Sieg circulation still applicable for homogeneous as well as heterogeneous liquid compositions as described by Klauck et al 10 The ternary mixtures were poured into the boiling flask of the circulation still and were equilibrated at the desired temperature. When the liquid composition was heterogeneous, the liquid phases were intensively stirred in The compositions of the liquid and vapor samples were analyzed by gas chromatography and by volumetric Karl Fischer titration.…”

“…4,5 The phase equilibrium data were determined by the dynamic method in a modified Rock and Sieg circulation still at reduced pressures. The control system necessary for these measurements was developed by our group 6 and has been successfully applied for several homogeneous and heterogeneous mixtures, e.g., the CHA + nonane binary system, 7 the water + octane + aniline ternary system, 8 and the water + toluene + aniline + CHA quaternary system. 7 The compositions of liquid and vapor samples were analyzed by Karl Fischer titration and by gas chromatography.…”

Measurement and Prediction of Vapor–Liquid Equilibria in Ternary Systems Containing an Organic Component, Cyclohexylamine, and Cyclohexanol

“…Experimental Procedure and Analytical Methods. Grenner et al 7 described the measurement equipment and the control system in detail. The modified Rock and Sieg circulation still used for these isothermal measurements was presented by Klauck et al 11 The ternary liquid mixtures are poured into the boiling flask of the circulation still and are equilibrated at the desired temperature.…”

“…5,6 The phase equilibrium data were determined by the dynamic method in a modified Rock and Sieg circulation still at reduced pressures. Due to the different boiling points of the organic compounds, the ternary systems were investigated at different temperatures: octane + CHA + CHOH at 343.15 and 373.15 K, CH + CHA + CHOH at 333.15 and 353.15 K, and toluene + CHA + CHOH at 343.15 and 373.15 K. The control system necessary for this purpose was developed by our group 7 and was applied successfully for several binary and morecomponent mixtures, e.g., CH + aniline, 8 water + octane + phenol, 9 water + toluene + aniline + CHA. 10 The compositions of liquid and vapor samples were analyzed by gas chromatography.…”

Understanding the Differing Fluid Phase Behavior of Cyclohexane + Benzene and Their Hydroxylated or Aminated Forms

“…Without a functional group, the binary mixture exhibits a pressure maximum azeotrope, 1−3 with the hydroxyl group bonded to the rings, the binary system exhibits a pressure minimum azeotrope, 4 and with the amine group bonded to the rings, the binary system is zeotropic. 5 The goal of this work was to elucidate the causes of this varying phase behavior.…”