abstract |
A catalyst which is free from alkali metal compounds and alkaline earth metal compounds, contains palladium and lead as active constituents and is supported on a carrier which contains two or more of the oxides ZnO, Al 2 O 3 , La 2 O 3 and TiO 2 , and the use of this catalyst for the preparation of methyl methacrylate from methacrolein, methanol and oxygen. |