反应条件对对氯硝基苯选择性加氢制备对氯苯胺的影响  

Effect of Reaction Conditions on Selective Hydrogenation of p-choronitrobenzene to p-chloroaniline

作　　者：张春[1] 樊光银[1] 黄文君[1] 王银虎[1] 

机构地区：[1]西华师范大学化学化工学院,四川南充637009

出　　处：《西华师范大学学报（自然科学版）》2011年第4期353-356,共4页Journal of China West Normal University(Natural Sciences)

基　　金：西华师范大学博士科研启动项目(412390)

摘　　要：采用化学还原法制备了Ir/TiO2催化剂,考察了反应时间、温度、底物的量、溶剂与水的比例、不同溶剂等因素对反应物对氯硝基苯的转化率和产物对氯苯胺选择性的影响.结果表明,当反应温度为50℃,压力1MPa,时间为40min,催化剂为20mg,溶剂与水的比例为28%时,反应物的转化率可以达到100%,选择性达到99.9%.Ir/TiO2 catalyst was prepared by reduction impregnation method and was used for the hydrogenation of p - ehoronitrobenzene（p - CNB）. The performance of the catalyst for the selective hydrogenation of p - CNB to p - CAN was performed in organic water mixtures solutions. Effect of reaction time, temperature, the different quality of p-CNB, solvent and water ratio on hydrogenation of p - CNB to p - CAN were investigated. Under the optimum conditions of reaction temperature at 50℃, time of 40min, the hydrogen pressure 1.0 MPa, ethanol water volume ratio 28% , the conversion of p - CNB and selectivity to p - CAN can achieve 100% and 99.9% , respectively.

关 键 词：对氯硝基苯 对氯苯胺 选择性加氢 铱催化剂 

分 类 号：O643[理学—物理化学]