Phase Equilibria for Quaternary Systems of Water plus Methanol or Ethanol plus Ethyl Methyl Carbonate plus Octane at T=298.15 K

摘要

Liquid-liquid equilibrium (LLE) data were measured at 298.15 K and atmospheric pressure for the quaternary [water + methanol + ethyl methyl carbonate (EMC) + octane] and (water + ethanol + EMC + octane) systems, and relevant ternary (water + methanol + EMC), (water + ethanol + EMC), (water + ethanol + octane) and (water + EMC + octane) systems. The modified and extended UNIQUAC activity coefficient models were employed to correlate the experimental LLE results, which were also correlated by the Othmer-Tobias equation. The separation factors were calculated from the LLE data. The extracting selectivity of methanol and ethanol from aqueous solutions using pure EMC and mixed solvent (EMC + octane) was studied.