| 摘要 |
PROCESS FOR PREPARING DIARYL CARBONATES AND POLYCARBONATESThe present invention relates to a process for the continuous preparation of diarylcarbonates from phosgene and at least one monohydroxy compound (monophenol) in the presence of catalysts, and also the use thereof for preparing polycarbonates. The hydrogen chloride formed in the reaction is converted by electrochemical oxidation into chlorine, with the chlorine being recirculated to the preparation of phosgene. In particular, the process comprises utilization of the hydrogen chloride formed for the process for preparingdiphenyl carbonate (DPC process).Figure:1 |
