| 摘要 |
PURPOSE:To prepare the titled compound in high rate of reaction and high conversion even at a high charging concentration of the raw materials, by reacting (meth)acrolein with methanol and molecular oxygen in the presence of Pd catalyst while removing the water from the reaction system. CONSTITUTION:Methyl methacrylate or methyl acrylate is prepared by reacting methacrolein or acrolein with methanol and molecular oxygen in the presence of a Pd-containing catalyst at 30-90 deg.C under pressure of 1-20kg/cm<2>. In the above process, the reaction is carried out while removing the water produced by the reaction and the water supplied to the reaction system together with the raw materials, and keeping the water content in the reaction system to preferably <=3.5wt% throughout the whole reaction period. The removal of water is performed, e.g. by containing the reaction materials with inorganic or organic dehydrant in or out of the reaction system, or by using a proper azeotropic agent for dehydration, etc. |
