Patent ID: 6071843
Filing Date: 2000-06-06
Classification: B01J,C07C,Y02P

Abstract:
A process for reactivating deactivated homogeneous catalysts for the oxidative carbonylation of aromatic hydroxy compounds which comprise a platinum group metal and a metal acting as a co-catalyst, which comprises treating the deactivated catalysts at 10-400.degree. C. in the liquid phase with 1-10,000 equivalents of oxidising agents per equivalent of the metallic constituents of the catalysts, removing excess oxidising agent, and treating the oxidised residue which thereby remains with 0.1-100 parts by weight of a C.sub.1 -C.sub.12 carboxylate or a C.sub.4 -C.sub.12 diketonate, with respect to 1 part by weight of the oxidised residue.