Vapor-Liquid Equilibrium of Dimethyl Carbonate-Methanol and Study on Separation of the Azeotrope System

Vapor-liquid equilibrium (VLE) data are theoretical basis of distillation separation.Results of measurement on VLE for the dimethyl carbonate-methanol binary system from published papers are introduced in the paper.The most comprehensive VLE data which are determined at normal and elevated pressure are correlated applying NRTL and Wilson thermodynamic methods.The parameters in models are regressed.Process simulation of transformation pressure rectification applying NRTL models under different pressure is conducted.Sensitivity analysis on reflux ratio and theoretical stage number of rectified towers in the process are perfected.The optimal process conditions of separation are established.The thermodynamic model of the binary system and optimal simulation result of separation process could be theoretical direction of industry design and production renovation.