Phase Equilibria of Ternary and Quaternary Systems Containing Diethyl Carbonate with Water

Abstract

In this study liquid phase equilibrium compositions were measured at 298.15 K under atmospheric pressure for (water + propan-1-ol + diethyl carbonate (DEC) + benzene or cyclohexane or heptane) quaternary systems and (water + DEC + propan-1-ol or benzene or cyclohexane) ternary systems. Good correlation of the experimental LLE data was seen for the measured systems by both modified and extended UNIQUAC models. The solubility of DEC in aqueous and organic phases is shown by equilibrium distribution coefficients calculated from the LLE data.

Liquid–Liquid Equilibrium Data of Water + Butyric Acid + {Butanal or n-Butanol} Ternary Systems at 293.15, 308.15, and 323.15 K

“…Extraction is generally considered as a feasible way of separating butyric acid from aqueous solutions due to its less energy consumption . Liquid–liquid equilibrium (LLE) data are useful in extraction processes because they can provide effective information for the optimization or excogitation of separation. − During the past time, heavy alcohols or alkanes were adopted as extraction agents in the separation of butyric acid from aqueous solutions, and the LLE data were measured and reported in literature. − However, considering the fact that there is usually a certain amount of n -butanol and butanal in the oxidized mixture, the extraction process of butyric acid from aqueous solutions includes the multicomponent liquid–liquid equilibrium (water, butyric acid, butanal, n -butanol, and so on). Moreover, the ternary LLE data can be used as the necessary basic data in investigating multicomponent liquid–liquid equilibrium, and there are generally two possible ternary systems (water + butyric acid + butanal, water + butyric acid + n -butanol) in the extraction process of butyric acid from the oxidized mixture.…”

Liquid–Liquid Equilibria for Ternary Systems of (Ethyl Methyl Carbonate + Methanol or Ethanol + Water) at 293.15, 303.15, and 308.15 K

“…The LLE data were determined from 293.15 to 308.15 K at atmospheric pressure. In our previous work, the experimental machines and operation procedures have been described fully. In this experiment, the liquid sample was placed in a water bath equipped with a thermostatic controller (accuracy of ±0.05 K).…”

“…14 The distribution coefficients and separation factors calculated from the obtained LLE data were used to establish the extraction capability of EMC and the possibility of EMC as an extractant for the separation of (water + methanol or ethanol) mixtures. 15 and operation procedures 16 have been described fully. In this experiment, the liquid sample was placed in a water bath equipped with a thermostatic controller (accuracy of ±0.05 K).…”

Atmospheric Ternary Liquid–Liquid Equilibrium for the Diethyl Carbonate + 1-Propanol + Water System at Temperature of 303.15, 313.15, 323.15, and 333.15 K

“…Therefore, the availability of LLE data is important to understand the phase behavior and the thermodynamic properties of systems containing water and alcohol with oxygenates. Recently, several studies have been reported for the ternary LLE systems containing DEC, alcohols, and water. − In our previous work, LLE data for a mixture composed of the DMC + 2-methyl-1-propanol or 2-methyl-2-propanol + water systems have been measured at 303.15 and 313.15 K …”