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AssigneeBayer Aktiengesellschaft
InventorsHans-Josef Buysch, Carsten Hesse, Jörg-Dietrich Jentsch, Johann Rechner, Eberhard Zirngiebl
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In the process for preparing an aromatic carbonate from an aromatic hydroxy compound, CO and O2 in the presence of a quaternary salt and a base using a platinum metal catalyst and a cocatalyst, use is advantageously made of supported catalysts containing, in the reaction-ready state, (i) a platinum metal, a platinum metal halide or a platinum metal halide complex and (ii) a metal compound acting as cocatalyst from groups IB, IIB, IIIA, IIIB, IVA, IVB, VB, VIB, VIIB, the iron group (atomic numbers 26-28) or the rare earth metals (atomic numbers 58-71) of the Periodic Table of the Elements (Mendeleev), each in an amount of 0.01-15% by weight, calculated as metal and based on the total weight of the catalyst.
A supported catalyst containing, in the reaction-ready state, (i) a platinum metal, a platinum metal halide or a complex containing a platinum metal halide, or a compound which can be converted under the reaction conditions into a platinum metal, a platinum metal halide or a complex containing a platinum metal halide, in an amount of 0.01-15% by weight, calculated as platinum metal and based on the total weight of the catalyst, and (ii) a metal compound acting as cocatalyst from groups IB, IIB, IIIA, IIIB, IVA, IVB, VB, VIB, VIIB, the iron group (atomic numbers 26-28) or the rare earth metals (atomic numbers 58-71) of the Periodic Table of the Elements (Mendeleev) in an amount of 0.01-15% by weight, calculated as metal and based on the total weight of the catalyst.
Dependencies are inferred from the claim text.