Pt-Fe/CNTs催化对氯硝基苯选择加氢的研究  

Research on selective hydrogenation of p-chloronitrobenze catalyzed by Pt-Fe/CNTs

作　　者：银莹 何代平 谭佳佳 段鸣玉 王兆鑫 谢磊 YIN Ying;HE Dai-ping;TAN Jia-jia;DUAN Ming-yu;WANG Zhao-xin;XIE Lei(Chongqing Key Lab of Green Synthesis and Applications,College of Chemistry,Chongqing Normal University,Chongqing 401331,China)

机构地区：[1]重庆师范大学化学学院绿色合成与应用重庆市重点实验室,重庆401331

出　　处：《应用化工》2021年第5期1306-1310,共5页Applied Chemical Industry

基　　金：重庆市基础科学与前沿技术研究项目(cstc2018jcyjAX0698)。

摘　　要：基于乙醇分子易被碳纳米管容纳,分别用H2PtCl6和Fe(NO3)3的乙醇溶液和先乙醇吸附饱和后再用H2PtCl6和Fe(NO3)3水溶液浸渍碳纳米管,将0.3%Pt-4%Fe负载于碳纳米管内和管外,考察了其催化对氯硝基苯选择加氢制备对氯苯胺性能,并采用TEM、XRD、XPS等对其结构进行了表征。结果表明,碳纳米管内负载0.3%Pt-4%Fe(0.3%Pt-4%Fe/in-CNTs)对催化对氯硝基苯加氢制备对氯苯胺具有优异性能。乙醇为溶剂、较高的H2压力和反应温度对0.3%Pt-4%Fe/in-CNTs催化对氯硝基苯加氢制备对氯苯胺有利。催化剂与对氯硝基苯质量比1∶50,30℃和1 MPa H2条件下反应50 min,p-CAN收率达100%,并且催化剂重复使用3次,活性无明显下降。Based on ethanol easily contained by carbon nanotubes, 0.3%Pt-4%Fe was loaded inside and outside the carbon nanotubes by impregnation using H2PtCl6 and Fe(NO3)3 ethanol solution and H2PtCl6 and Fe(NO3)3 aqueous solution after ethanol saturation respectively.The performance of the as-prepared catalysts for p-chloronitrobenzene hydrogenation to p-chloroaniline were investigated, and their structures were characterized by the techniques of TEM,XRD and XPS.The results showed that the catalyst with a loading of 0.3%Pt-4%Fe inside the CNTs(0.3%Pt-4%Fe/in-CNTs) exhibited excellent performance for p-chloronitrobenzene selective hydrogenation to p-chloroaniline.Ethanol as solvent, higher reaction temperature and H2 pressure are favorable to p-chloronitrobenzene selective hydrogenation to p-chloroaniline over the 0.3%Pt-4%Fe/in-CNTs catalyst.The p-chloroaniline was obtained with a yield of 100% under catalyst/p-chloronitrobenzene mass ratio of 1∶50,30 ℃ and 1.0 MPa H2 for 50 min, and the activity of the 0.3%Pt-4%Fe/in-CNTs catalyst didn’t decrease obviously even after the third recycle.

关 键 词：碳纳米管 铂 铁 对氯硝基苯 对氯苯胺 

分 类 号：TQ032.41[化学工程]