| 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, wherein the an oxygen concentration of 0.5 to 7.5 mol %, and wherein the reactor comprises a partition having a catalyst bed on a first side of the partition and having flow through the catalyst bed in a first direction and at the Flow in the opposite direction on the second side of the baffle. |