Process for preparing methacrylic or acrylic esters

摘要

PCT No. PCT/JP97/03173 Sec. 371 Date Mar. 10, 1999 Sec. 102(e) Date Mar. 10, 1999 PCT Filed Sep. 9, 1997 PCT Pub. No. WO98/11050 PCT Pub. Date Mar. 19, 1998A process for producing a methacrylic acid ester or an acrylic acid ester comprising: reacting methacrolein or acrolein with an alcohol or molecular oxygen in the presence of a catalyst comprising Pd; removing water with a separation membrane which can selectively permeate water from a mixed liquid of the alcohol and water.