Manufacturing method for polycarbonate

摘要

A manufacturing method for polycarbonate comprising ÄIÜ a process for manufacturing diaryl carbonate from an aromatic hydroxy compound and an aromatic hydroxy compound, ÄIIÜ a process for manufacturing polycarbonate by solution polymerization of the diaryl carbonate obtained in ÄIIÜ and an aromatic dihydroxy compound in the presence of a catalyst comprising a nitrogen-containing basic compound, and ÄIIIÜ a process for separating and removing the nitrogen-containing compound from the aromatic hydroxy by-products in ÄIIÜ and returning the resultant aromatic hydroxy compounds to process ÄIÜ 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. <IMAGE>