Processes comprising: transesterifying a dialkyl carbonate and an aromatic hydroxyl compound in the presence of a transesterification catalyst to provide a diaryl carbonate product comprising the transesterification catalyst as an impurity; subjecting the diaryl carbonate product to distillation in a first distillation column having an upper part and a lower part, wherein the upper part comprises a rectifying section and the lower part comprises a stripping section; and withdrawing a first sidestream from the first distillation column, wherein the first sidestream comprises a purified diaryl carbonate.
包括以下过程:在存在酯交换催化剂的情况下,将二烷基
碳酸酯和芳香羟基化合物进行酯交换反应,以提供含有酯交换催化剂作为杂质的二芳基
碳酸酯产品;将二芳基
碳酸酯产品在第一精馏塔中蒸馏,该精馏塔具有上部和下部,其中上部包括一个精馏段,下部包括一个剥离段;从第一精馏塔中提取第一旁流,第一旁流包括纯化的二芳基
碳酸酯。