中文摘要：

甲基丙烯酸甲酯（MMA）是生产有机玻璃（PMMA）的核心单体,目前主要采用丙酮氰醇法（ACH法）生产,此法工艺流程长、原子经济性低（约47%）、经济效益差、环境污染严重,因此,开发一条绿色高效的合成工艺路线意义重大.

英文摘要：

The Pd-Pb catalyst supported on Al2O3 was prepared by the two-step impregnation method. The oxidative esterification of methacrolein （MAL） to methyl methacrylate （MMA） was carried out in a stainless bubble autoclave over the catalyst. The influences of the reaction conditions on catalytic activity were investigated in detail. The optimal reaction conditions were as follows. T= 80℃, P=0. 3 MPa, methanol ： MAL=8 ： 1 （ molar ratio ）, catalyst mass concentration in the reaction system 3.84%, pH of the reaction system 7-8, oxygen flux rate 30 ml · min^-1. Under the above conditions, MAL conversion and MMA selectivity reached 91% and 84%, respectively. The catalyst was recycled for seven times and still kept good selectivity.