CIESC Journal ›› 2005, Vol. 56 ›› Issue (1): 70-74.
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WANG Lin;WANG Dongxian;GONG Qingtao;ZHAO Sui;YU Jiayong
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王琳;王东贤;宫清涛;赵濉;俞稼镛
Abstract: 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℃), 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.
Key words: α-烷基取代苯甲醇, Pd/C催化剂, 高氯酸, 助催化剂, 机理
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400~800 kPa.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.
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
WANG Lin, WANG Dongxian, GONG Qingtao, ZHAO Sui, YU Jiayong. Hydrogenation of α-alkyl benzoic alcohol into corresponding alkyl benzene catalyzed by Pd/C[J]. CIESC Journal, 2005, 56(1): 70-74.
王琳, 王东贤, 宫清涛, 赵濉, 俞稼镛. α-烷基苯甲醇的催化氢化 [J]. 化工学报, 2005, 56(1): 70-74.
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