Mo基/HZSM-5催化剂催化硝基苯加氢合成对氨基苯酚  

Synthesis of p-Aminophenol via Hydrogenation of Nitrobenzene Over Mo-Base/HZSM-5 Catalyst

作　　者：赵茜[1] 沈建琦[1] 何蓓蓓[1] 王淑芳[1] 王延吉[1] 

机构地区：[1]河北工业大学绿色化工与高效节能河北省重点实验室,天津300130

出　　处：《石油学报（石油加工）》2015年第1期45-50,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金重点项目(21236001);河北省重大技术创新项目(122756603Z);河北省自然科学基金项目(B2011202197)资助

摘　　要：制备了Mo基/HZSM-5双功能催化剂,用于催化硝基苯加氢合成对氨基苯酚(PAP)反应,考察了催化剂制备方法、Mo负载量、反应条件对其催化性能的影响。结果表明,与MoO2/HZSM-5相比,相同Mo负载量的MoS2/HZSM-5在催化合成PAP反应中表现出较高的催化活性,在w(3%MoS2/HZSM-5)=0.5%、T=155℃、p=3.5 MPa、t=2h条件下,硝基苯转化率为91.4%,PAP选择性为47.6%。MoS2/HZSM-5中掺杂第二金属Mn,可调变该催化剂的活性位,有助于提高催化合成PAP反应的PAP选择性;当Mn负载量为0.5%(质量分数)时,硝基苯转化率为76.5%,PAP选择性为55.8%。A series of Mo-base/HZSM-5 catalysts were prepared for the hydrogenation of nitrobenzene to p-aminophenol（PAP）.The effects of preparation method,Mo loading amount and hydrogenation conditions on the conversion and PAP selectivity of the reaction were investigated.The results revealed that MoS2/HZSM-5 catalyst exhibited higher catalytic activity than MoO2/HZSM-5 with the same Mo loading amount in PAP synthesis.Under the optimized conditions of 3%MoS2/HZSM-5amount 0.5%,reaction temperature 155℃,pressure 3.5MPa and reaction time 2h,the nitrobenzene conversion was 91.4% and the PAP selectivity was 47.6%.Doping of Mn in MoS2/HZSM-5could change the active sites and improve PAP selectivity for the hydrogenation of nitrobenzene.Catalyzed by MoS2-Mn/HZSM-5 with Mn loading amount of 0.5%（mass fraction）,the nitrobenzene conversion and PAP selectivity of PAP synthesis reached 76.5% and 55.8%,respectively.

关 键 词：对氨基苯酚 硝基苯 双功能催化剂 Mo基催化剂 

分 类 号：TQ032.41[化学工程]