Strategy for the Separation of the Mixture of Dimethyl Carbonate, Formaldehyde, and Water

In this work, the separation of a mixture of dimethyl carbonate (DMC), formaldehyde, and water is studied. In our process, formaldehyde is first extracted using water as the entrainer, and then the azeotrope of DMC–water is separated by extractive distillation with ethylene glycol. To verify the feasibility of the process, the liquid–liquid equilibrium (LLE) data of the DMC–formaldehyde–water system was measured and the vapor–liquid equilibrium...