Device and method for refining and purifying diphenyl carbonate

The invention provides a device and a method for refining and purifying diphenyl carbonate. A condenser is connected with a crystallizer; the crystallizer is connected with a separator; the separatoris connected with an intermediate tank; the intermediate tank is connected to the top of a rectifying tower through a pump, the bottom of the rectifying tower is provided with a discharging pipe, andthe top is provided with an impurity gas outlet. The method comprises the following steps: crude product diphenyl carbonate and phenol enter a cooler to be cooled to 0-10 DEG C; then, mixture enters the crystallizer, solvent is stirred at a low speed and added; the temperature in the crystallizer is controlled to be 0-10 DEG C by a temperature controller; diphenyl carbonate is quickly crystallizedto enter the separator; after crystal and a solvent are separated, the crystal enters the intermediate tank; the crystal diphenyl carbonate is pumped to the rectifying tower to be rectified to obtaindiphenyl carbonate of which