Preparation device, preparation method and preparation system of diphenyl carbonate

The invention discloses a preparation device, a preparation method and a preparation system of diphenyl carbonate. The device comprises a methyl phenyl carbonate synthesis unit, a methyl phenyl carbonate purification unit and a diphenyl carbonate synthesis unit, a first reactive distillation tower of the methyl phenyl carbonate synthesis unit is used for synthesizing methyl phenyl carbonate, and a methyl phenyl carbonate concentration tower of the methyl phenyl carbonate purification unit is used for concentrating the methyl phenyl carbonate; and a second reactive distillation tower of the diphenyl carbonate synthesis unit is used for synthesizing diphenyl carbonate. According to the device, most of the raw material dimethyl carbonate (DMC) is directly recovered by adding the MPC purification unit and adopting an MPC concentration process, so that the separation energy consumption of the DMC/methanol azeotrope is reduced, the double-reaction rectification esterification process is integrally improved, the pur