异佛尔酮在蛋壳型Pd/Al_2O_3催化剂上的选择性加氢

Selective Hydrogenation of Isophorone on Egg-Shelled Pd/Al_2O_3 Catalyst

采用等体积浸渍法制备出蛋壳型Pd/Al2O3催化剂,采用连续加氢固定床微反装置研究了异佛尔酮(IP)的选择性加氢反应,考察了载体焙烧温度、蛋壳层厚度、Pd负载量及粒子大小、溶剂等反应条件对Pd/Al2O3催化剂上IP选择性加氢的影响。结果表明,蛋壳型Pd/Al2O3是IP选择性加氢制备3,3,5-三甲基环己酮(TMCH)的优异催化剂,反应条件缓和,IP转化率及TMCH选择性均可达到99.5%以上,具有良好的工业应用前景。

Egg-shelled catalysts Pd / Al2O3 were prepared by incipient impregnation method,and the effects of calcination temperature of supports. egg-shell depth,Pd loading and particle size,type of solvents and reaction conditions on the selective hydrogenation of isophorone（ IP） were investigated using fixed-bed hydrogenation microreactor. The results indicate that egg-shelled Pd / Al2O3 is a perfect catalyst for the selective hydrogenation of IP to prepare 3,3,5-trimethylcyclohexanone（ TMCH）,and the conversion of IP and selectivity of TMCH both reach up to 99. 5% under mild conditions,showing good prospects for industrial application.