Abstract: Glucuronic acid was synthesized by 1% Pd/La0.5Pb0.5MnO3 catalytic oxidation from methyl glucoside oxidized selectively. The support and catalyst samples were characterized by XRD and SEM techniques. The effects of different catalyst preparation methods and conditions of catalytic oxidation on the yield of glucuronic acid were studied. The results showed that the supports produced by sol-gel method and the catalyst prepared by precipitation had better catalytic activity, the yield of glucuronic acid reached 29.5% under the conditions of catalyst dosage 1/6 (based on glucoside mass), temperature 70℃, pH value 9, reaction time 5 h, and the ordinary pressure, and the catalyst had good selectivity.

Key words: methyl glucoside, glucuronic acid, catalytic oxidation, Pd/La0.5Pb0.5MnO3 catalyst

摘要： 采用沉淀法制备了以钙钛矿型复合金属氧化物为载体的催化剂Pd/La0.5Pb0.5MnO3，催化氧化甲基葡萄糖苷合成甲苷酸钠，进一步水解反应生成葡萄糖醛酸. 利用XRD和SEM对催化剂进行了表征，考察了催化剂制备和氧化工艺条件对葡萄糖醛酸收率的影响. 结果表明，在Pd负载量为1%、原料与催化剂质量比为6:1、温度70℃、压力为常压、pH值9、时间5 h的条件下，葡萄糖醛酸的收率达到29.5%，反应选择性较好.

关键词: 甲基葡萄糖苷, 葡萄糖醛酸, 催化氧化, Pd/La0.5Pb0.5MnO3负载型催化剂