A manufacturing method for polycarbonate comprising [I] a process for manufacturing diaryl carbonate from an aromatic hydroxy compound and an aromatic hydroxy compound, [II] a process for manufacturing polycarbonate by solution polymerization of the diaryl carbonate obtained in [II] and an aromatic dihydroxy compound in the presence of a catalyst comprising a nitrogen-containing basic compound, and [III] a process for separating and removing the nitrogen-containing compound from the aromatic hydroxy by-products in [II] and returning the resultant aromatic hydroxy compounds to process [I] effectively reuses aromatic hydroxy by-products (e.g., phenols) of polycarbonate manufacturing to manufacture diaryl carbonate, while suppressing the production of alkyl aromatic ethers and then uses this diaryl carbonate to manufacture polycarbonate with good productivity.
一种聚
碳酸酯的制造方法,包括[I]用芳香族羟基化合物和芳香族羟基化合物制造
碳酸二芳基酯的工艺,[II]在由含氮碱性化合物组成的催化剂存在下,通过溶液聚合[II]中得到的
碳酸二芳基酯和芳香族二羟基化合物制造聚
碳酸酯的工艺、和[III]一种从[II]中的芳香族羟基副产物中分离和除去
含氮化合物并将所得芳香族羟基化合物返回工艺[I]的工艺,该工艺可有效地再利用芳香族羟基副产物(如......)。g.,
酚)来生产
碳酸二芳基酯,同时抑制烷基芳香醚的生产,然后利用
碳酸二芳基酯生产聚
碳酸酯,生产率高。