202003kona0journalOriginalKo, M.[MinSu]Na, S.[Sangyoup]Lee, S.[Sungjin]Kim, H.[Hwayong]J. Chem. Eng. Data20032003-07-01Liquid-Liquid Equilibria for the Binary Systems of N-Formylmorpholine with CycloalkanesLiquid-liquid equilibrium (LLE) data were measured for three binary systems containing N-formylmorpholine and cycloalkanes (cyclopentane, cyclohexane, and cyclooctane) over the temperature a circulation type instrument with an equilibrium view cell. The compositions of both cycloalkane-rich and N-formylmorpholine-rich phases were analyzed by on-line gas chromatography. The binary liquid-liquid equilibrium data were correlated with the NRTL and UNIQUAC equations using temperature-dependent parameters. The NRTL and UNIQUAC equations fitted the experimental data of the equilibria with a good precision, although a clear deviation was observed in the vicinity of the upper critical solution temperature (UCST). The properties for the critical point are expressed in terms of an exponential law. The solubility of cycloalkanes in the N-formylmorpholine increases in the following order at the same temperature: cyclopentane, cyclohexane, and cyclooctane.LLE48249-2521N-formylmorpholineC5H9NO21Commercial source199.004Not known299.994Gas chromatography2cyclopentaneC5H101Commercial source199.004Not known299.934Gas chromatography3cyclohexaneC6H121Commercial source199.504Not known299.934Gas chromatography4cyclooctaneC8H161Commercial source199.964Not known299.954Gas chromatography2111Principal objective of the workJCEJCE4/3/20031Upper consolute temperature, KOtherLiquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Air at 1 atmosphere1381.14562111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography2Liquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Pressure, kPa101.341Temperature, K1304.3151.983341310.851.982841320.7251.974541330.4151.972141340.551.961441350.1551.943841354.8251.935141359.6451.925741364.7551.914241369.7851.895341374.1151.870441376.4951.857541379.3951.822741380.3551.812142111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography2Liquid mixture 2Direct value, XLiquid mixture 2Liquid mixture 1Pressure, kPa101.341Temperature, K1304.3151.128641310.851.135441320.7251.1541330.4151.176741340.551.211741350.1551.264741354.8251.283441359.6451.314841364.7551.358141369.7851.395841374.1151.436541376.4951.455241379.3951.509941380.3551.540343111Principal objective of the workJCEJCE4/3/20031Upper consolute temperature, KOtherLiquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Air at 1 atmosphere1392.04763111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography3Liquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Pressure, kPa101.341Temperature, K1303.0551.986841308.1551.986741313.0451.98341322.7851.973841333.2451.967541342.8951.960141353.6451.947841363.4251.934641373.0651.912941382.4251.880941389.8351.816941391.5751.779341391.6251.765643111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography3Liquid mixture 2Direct value, XLiquid mixture 2Liquid mixture 1Pressure, kPa101.341Temperature, K1303.0551.077631308.1551.082431313.0451.091931322.7851.101941333.2451.120341342.8951.13641353.6451.156741363.4251.186341373.0651.231541382.4251.296141389.8351.383641391.5751.444841391.6251.428944111Principal objective of the workJCEJCE4/3/20031Upper consolute temperature, KOtherLiquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Air at 1 atmosphere1392.40764111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography4Liquid mixture 1Direct value, XLiquid mixture 1Liquid mixture 2Pressure, kPa101.341Temperature, K1301.9951.977341310.9951.973841320.8851.968941330.3651.966241340.551.957641349.9551.951441359.2451.940541368.3151.926441373.2751.912841378.0451.901241382.7151.881241387.6851.853241389.3751.839641390.2751.825341391.751.802641392.1651.689344111Principal objective of the workJCEJCE4/3/20031Mole fractionChromatography4Liquid mixture 2Direct value, XLiquid mixture 2Liquid mixture 1Pressure, kPa101.341Temperature, K1301.9951.051431310.9951.054231320.8851.062531330.3651.072431340.551.084831349.9551.095431359.2451.110841368.3151.132641373.2751.156841378.0451.176141382.7151.20141387.6851.23641389.3751.243841390.2751.262641391.751.287241392.1651.40254