Solvent-free selective hydrogenation of o-chloronitrobenzene to o-chloroaniline over alumina supported Pt nanoparticles  

作　　者：Qiang Bai Dan Li Lu He Hailian Xiao Ning Sui Manhong Liu 

机构地区：[1]College of Materials Science and Engineering, Qingdao University of Science and Technology

出　　处：《Progress in Natural Science:Materials International》2015年第3期179-184,共6页自然科学进展·国际材料（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21301103);the Taishan Scholarship,the Shandong Natural Science Foundation(ZR2012FZ007);the Shandong Province High Education Research and Development Program(J13LA08)

摘　　要：A supported Pt/Al2O3 catalyst was prepared by immobilizing preformed colloidal Pt nanoparticles on Al2O3. The particle size and size distribution of Pt particles on Al2O3 remained the same as the colloidal nanoparticles. Selective hydrogenation of o-chloronitrobenzene to ochloroaniline was performed on the as-prepared Pt/Al2O3 nanocatalyst without using any solvent and 88.5% selectivity to o-chloroaniline at98.2% conversion of o-chloronitrobenzene was achieved. Further catalytic experiments with metal cation modification showed that some metal cations could improve the activity in various degrees while maintaining the high selectivity. Especially, 99.8% selectivity to o-chloroaniline at 100% conversion was attained with Sn4+.A supported Pt/Al2O3 catalyst was prepared by immobilizing preformed colloidal Pt nanoparticles on Al2O3. The particle size and size distribution of Pt particles on Al2O3 remained the same as the colloidal nanoparticles. Selective hydrogenation of o-chloronitrobenzene to ochloroaniline was performed on the as-prepared Pt/Al2O3 nanocatalyst without using any solvent and 88.5% selectivity to o-chloroaniline at98.2% conversion of o-chloronitrobenzene was achieved. Further catalytic experiments with metal cation modification showed that some metal cations could improve the activity in various degrees while maintaining the high selectivity. Especially, 99.8% selectivity to o-chloroaniline at 100% conversion was attained with Sn4+.

关 键 词：CHLOROANILINE Selective HYDROGENATION SOLVENT-FREE NANOPARTICLE Metal CATION modification 

分 类 号：TQ246.31[化学工程—有机化工]