Process for purification of diphenyl carbonate for the manufacturing of high quality polycarbonate

A process for purifying a diaryl carbonate, comprising:

• introducing an aqueous stream to a diaryl carbonate stream that comprises a metal contaminant, wherein the diaryl carbonate stream comprises greater than or equal to 70 wt % diaryl carbonate based on the total weight of the diaryl carbonate stream, wherein the aqueous stream reacts with the metal contaminant to form a precipitate;
• wherein introducing the aqueous stream to the diaryl carbonate stream results in introducing 100 to 10,000 ppm water based on the total composition of the diaryl carbonate stream and the aqueous stream;
• removing the precipitate via one or both of a separation column and a filter to result in a purified diaryl carbonate;
• wherein when the removing utilizes the separation column, the process further comprises:
• removing a bottom stream comprising the precipitate from the separation column;
• removing a top stream from the separation column;
• directing a top stream first portion into the separation column and collecting a top stream second portion, wherein the top stream second component comprises the purified diaryl carbonate.