Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Liquid-liquid equilibrium (LLE) data for several carbohydrate + IL aqueous biphasic systems including the ionic liquid: 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) and six carbohydrates: monosaccharides (L-(+)-arabinose, D-(+)-xylose, D-(+)-glucose and D-(-)-fructose) and disaccharides (maltose and sucrose) were obtained at different temperatures. With fitting the obtained LLE data to a Setschenow-type equation, the positive (soluting-out effect) soluting-out coefficients, ks, were obtained. The values of ks were increased with decreasing temperature and increasing hydrophilicity of the carbohydrates. Extractions of two alkaloids including codeine and caffeine with [Bmim][BF4]/carbohydrate ABS were examined. The effect of temperature, tie-line length (TLL), hydrophilicity of sugars, and physicochemical properties of alkaloids on the partition coefficient and standard molar Gibbs free energy changes (trG0m) were studied. Both codeine and caffeine had high tendency for hydrophobic IL-rich phase and this orientation increased with increasing TLL, hydrophilicity of sugars, and decreasing temperature.