α-烷基苯甲醇的催化氢化  

Hydrogenation of α-alkyl benzoic alcohol into corresponding alkyl benzene catalyzed by Pd/C

作　　者：王琳[1] 王东贤[1] 宫清涛[1] 赵濉[1] 俞稼镛[1] 

机构地区：[1]中国科学院理化技术研究所,北京100101

出　　处：《化工学报》2005年第1期70-74,共5页CIESC Journal

基　　金：国家重点基础研究发展规划项目 (G19990 2 2 5 )资助~~

摘　　要：研究了在H2 HAc HClO4体系中 ,Pd/C催化氢化α 烷基取代苯甲醇到相应的支链烷基苯的反应 .讨论了反应温度、氢气压力、Pd/C催化剂用量对反应的影响 ,以及高氯酸作为助催化剂在此反应中起的重要作用 .高氯酸作为助催化剂时 ,最佳的反应条件是 :质量分数为 5 %～ 10 %的Pd/C催化剂 ,室温 15～ 30℃ ,氢气压力 4 0 0～ 80 0kPa .XPS能谱分析表明 ,在高氯酸存在下Pd的表面生成了PdOxCly 原子簇化合物 ,形成高活性的活性中心 ,对催化氢化起到了促进作用 .α-Alkyl benzoic alcohol is hydrogenated over Pd/C in the H2-HAc-HClO4 system into the corresponding branched-alkyl benzene. The influence of the reaction temperature, hydrogen gas pressure and the amount of catalyst is investigated. Perchloric acid as co-catalyst plays a key role in relation to the catalyst activity. Room temperature (15-30°C), H2 pressure (400-800 kPa), and 5%-10% Pd/C catalyst by mass are the optimum conditions for this hydrogenation reaction. Perchloric acid as co-catalyst can lead to formation of PdOxCly, cluster on the surface of Pd during the hydrogenation reaction. PdOxCly, cluster may be a new active center, which enhances the activity of catalyst.

关 键 词：α-烷基取代苯甲醇 PD/C催化剂 高氯酸 助催化剂 机理 

分 类 号：O643.3[理学—物理化学]