Heterogeneous Pd Catalyst for Oxidative Carbonylation of Bisphenol A to Polycarbonate

Polycarbonates (PCs) were prepared by oxidative carbonylation of bisphenol A and carbon monoxide, using a Pd-polybipylidyl complex, Pd-polyvinylpyridine complex, smectite-supported Pd complex, or hydrotalcite-supported Pd complex as a heterogeneous Pd catalyst to separate the PC solution and the Pd catalyst after the reaction. Propylene carbonate was used as a halogen-free solvent. When Co(OAc)(2)center dot H2O was used as the inorgano-redox catalyst, all of the Pd compounds gave a pod PC yield with the recycling potential of the catalyst. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 110: 3902-3907,2008