| abstract |
A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a precious metal in a reactor, wherein the catalyst has an average diameter of at least 200 microns and the liquid and gaseous reactants are There is downward flow in the reactor, and wherein the continuous phase in the reactor is a gas with no more than 7.5 mol% oxygen at the reactor inlet. |