The liquidliquid equilibrium data for two ternary systems, ethanolwaterKF and ethanol waterK2CO3, were determined at 25oC. Experiments show that by adding KF or K2CO3 into the ethanolwater system two phases are formed...The liquidliquid equilibrium data for two ternary systems, ethanolwaterKF and ethanol waterK2CO3, were determined at 25oC. Experiments show that by adding KF or K2CO3 into the ethanolwater system two phases are formed: an ethanol-rich phase with negligible salt and a water-rich phase with negligible ethanol, thus water can be separated out easily. A mathematical calculation of the liquidliquid equilibrium data was carried out with the Pitzer theory on water activity in the aqueous phase, and with the Wilson or NRTL or UNIQUAC equations for that in the ethanol phase, which is in good agreement with experimental data.展开更多
文摘The liquidliquid equilibrium data for two ternary systems, ethanolwaterKF and ethanol waterK2CO3, were determined at 25oC. Experiments show that by adding KF or K2CO3 into the ethanolwater system two phases are formed: an ethanol-rich phase with negligible salt and a water-rich phase with negligible ethanol, thus water can be separated out easily. A mathematical calculation of the liquidliquid equilibrium data was carried out with the Pitzer theory on water activity in the aqueous phase, and with the Wilson or NRTL or UNIQUAC equations for that in the ethanol phase, which is in good agreement with experimental data.
