Thermodynamic analysis of transesterification between dimethyl carbonate and ethanol

The enthalpy,entropy and Gibbs free energy changes as well as the equilibrium constants of the reactions for the synthesis of diethyl carbonate(DEC) by transesterification of dimethyl carbonate(DMC) with ethanol were calculated by Benson and Joback group contribution methods.The results showed that the transesterification reaction is exothermic,so the higher temperature is unfavorable for DEC synthesis.The equilibrium constant of the transesterification reaction between ethyl methyl carbonate(EMC) and ethanol is larger than that of EMC dismutation reaction.