Preparation,structural characterization of a novel egg-shell palladium sulfide catalyst and its application in selective reductive alkylation reaction  

作　　者：Qun Feng Zhang Jia Chun Wu Chang Su Feng Feng Qiao Ling Ding Zhao Lian Yuan Hong Wang Lei Ma Chun Shan Lu Xiao Nian Li 

机构地区：[1]Industrial Catalysis Institute,State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology,Zhejiang University of Technology,Hangzhou 310032,China

出　　处：《Chinese Chemical Letters》2012年第10期1111-1114,共4页中国化学快报（英文版）

基　　金：supported by Zhejiang Provincial Natural Science Foundation of China(No LY12B03009);Program from Science and Technology Department of Zhejiang Province(No2011R09020-03)

摘　　要：A novel egg-shell Pd-S catalyst with palladium metal as the core and a membrane of palladium sulfide as the surface has been prepared by sulphidizing Pd/C with H2S. This catalyst is effective for the reductive alkylation of p-amino diphenylamine （PADPA） and methylisobutyl ketone （MIBK） to afford N-（1,3-dimethylbutyl）-N^-phenyl-p-phenylenedianine （DBPPD） with conversion up to 99.42% and selectivity to 97.46%. Comparing with the other common palladium sulfide catalysts, the membrane of palladium sulfide on the surface and the core of palladium metal cause the Pd on the surface of the new catalyst in a lower sulfur coordination, which improves its activity. Our result indicates that this new egg-shell Pd-S/C is an efficient hydrogenation catalyst.A novel egg-shell Pd-S catalyst with palladium metal as the core and a membrane of palladium sulfide as the surface has been prepared by sulphidizing Pd/C with H2S. This catalyst is effective for the reductive alkylation of p-amino diphenylamine （PADPA） and methylisobutyl ketone （MIBK） to afford N-（1,3-dimethylbutyl）-N^-phenyl-p-phenylenedianine （DBPPD） with conversion up to 99.42% and selectivity to 97.46%. Comparing with the other common palladium sulfide catalysts, the membrane of palladium sulfide on the surface and the core of palladium metal cause the Pd on the surface of the new catalyst in a lower sulfur coordination, which improves its activity. Our result indicates that this new egg-shell Pd-S/C is an efficient hydrogenation catalyst.

关 键 词：HaS Palladium sulfide Egg-shell Reductive alkylation 

分 类 号：TQ241.1[化学工程—有机化工] O643.36[理学—物理化学]