| Abstract
| - Liquid−liquid equilibria and liquid−liquid−liquid equilibria were determined for (water + cyclohexylamine +toluene), (water + cyclohexylamine + propylbenzene), (water + cyclohexylamine + heptane), and (water +cyclohexylamine + octane) at temperatures of (298.15, 303.15, and 333.15) K at atmospheric pressure byphotometric turbidity titration. The composition of conjugate phases was determined by gas−liquid chromatographyor potentiometric titration and Karl Fischer titration. All systems show type I behavior since there is only onebinary pair of partial miscible liquids. Surprisingly, the systems (water + cyclohexylamine + heptane) and (water+ cyclohexylamine + octane) have a three-phase region in a limited temperature range. The data were predictedwith the NRTL and the UNIQUAC models in comparison to the Elliott−Suresh−Donohue equation of statebased on binary interaction parameters only.
|
