改性骨架镍催化对硝基苯甲醛选择性加氢制对氨基苯甲醛  

Selective Hydrogenation of p-Nitrobenzaldehyde to p-Aminobenzaldehyde over Modified Skeletal Ni

作　　者：郭启迪[1] 荣泽明[1] 吕欣怡[1] 王伊凡[1] 刘娜[1] 杜文强[1] 

机构地区：[1]大连理工大学化工与环境生命学部精细化工国家重点实验室,辽宁大连116024

出　　处：《石油化工》2011年第11期1211-1215,共5页Petrochemical Technology

基　　金：辽宁省教育厅2010年度高等学校科研计划项目(LT2010021);大连理工大学基本科研业务费专项资金项目(DUT10RC(3)107)

摘　　要：采用淬冷法制备了改性骨架镍催化剂,并将其用于对硝基苯甲醛(PNB)选择性加氢制备对氨基苯甲醛(PAB)的反应,对比了该催化剂与商品Raney Ni催化剂催化PNB加氢反应的活性,考察了溶剂种类、反应温度、反应压力、PNB用量和催化剂用量等因素对加氢反应的影响,得到适宜的反应条件。实验结果表明,改性骨架镍催化剂活性和选择性均较高;在反应温度40℃、反应压力0.5 MPa、PNB用量0.50 g、催化剂用量0.10 g、甲醇用量15 mL、反应时间35 min的适宜条件下,PNB转化率为100.0%,PAB选择性达到98.2%;催化剂稳定性实验结果表明,该催化剂连续使用13次后活性和PAB选择性基本不变。A skeletal Ni catalyst was prepared by quenching technique and was used in the hydrogenation of p-nitrobenzaldehyde（PNB） to p-aminobenzaldehyde（PAB）.The activity of the modified skeletal Ni catalyst was compared with the two commercial Raney Ni catalysts.The effects of solvent,reaction temperature,reaction pressure,PNB dosage and catalyst dosage on the hydrogenation of PNB were investigated.The results showed that the catalytic activity and selectivity of the modified skeletal Ni were very high.Under the optimized reaction conditions of reaction temperature 40 ℃,reaction pressure 0.5 MPa,PNB dosage 0.50 g,the modified skeletal Ni catalyst 0.10 g,methanol 15 mL and reaction time 35 min,the conversion of PNB and the selectivity to PAB could reach 100.0% and 98.2%,respectively.When the catalyst was repeatedly used for 13 times,the activity and selectivity remained unchanged.

关 键 词：对硝基苯甲醛 对氨基苯甲醛 选择性加氢 改性骨架镍催化剂 

分 类 号：TQ032.4[化学工程]