Regeneration of supported catalysts containing palladium and/or platinum and tellurium

A process for regenerating a supported catalyst for acyloxylations, which catalyst contains palladium or platinum or mixtures thereof as well as tellurium, with or without copper, the copper content A being from 0 to 2, where A is the number of gram atoms of copper per gram atom of the palladium or platinum or mixtures thereof, which process comprises:

• impregnating the catalyst to be regenerated with a copper solution in such an amount that the regenerated catalyst has a copper content B=A+C, where A has the above meaning and C is a number from 0.5 to 6;
• drying the impregnated catalyst at from 50.degree. to 200.degree. C.;
• then treating the catalyst with a reducing agent at from 100.degree. to 500.degree. C.;
• and
• finally heating the catalyst at from 400.degree. to 900.degree. C.