| abstract |
Catalyst systems containing platinum metal, which consist of at least one platinum metal, a cocatalyst and further salts, which are used for the preparation of diaryl carbonates by oxidative reaction of aromatic hydroxy compounds with carbon monoxide, can be reactivated by treating the deactivated catalyst system in the liquid phase with an oxidizing agent , the excess oxidizing agent is separated off and the reactivated catalyst system is reacted with a carboxylate or a diketonate. |