非晶态Ni-Mo-P催化剂上硝基苯加氢为苯胺及催化剂失活机理  

Hydrogenation of nitrobenzene to aniline on amorphous Ni-Mo-P catalysts and mechanism of catalyst deactivation

作　　者：刘自力[1,2] 秦祖赠[2] 张健杰[1] 王燕华[2] 

机构地区：[1]广州大学化学化工学院,广东广州510006 [2]广西大学化学化工学院,广西南宁530004

出　　处：《化工学报》2012年第1期121-126,共6页CIESC Journal

基　　金：国家自然科学基金项目(21076047)~~

摘　　要：引言苯胺是一种重要的有机中间体,广泛应用于聚氨酯、橡胶助剂和医药等领域[1-3]。硝基苯催化加氢法合成苯胺是目前应用较为广泛的工艺之一。其生产方法主要有硝基苯Fe粉还原法、苯酚氨碱法和硝基苯催化加氢法[4],其中。The process of nitrobenzene hydrogenation to aniline using an amorphous Ni-Mo-P alloy as the catalyst and the deactivation mechanism of the amorphous Ni-Mo-P alloy catalyst were studied.Investigation of the effects of reaction time,temperature,and hydrogen pressure on nitrobenzene hydrogenation to aniline using the Ni-Mo-P catalyst revealed optimum conditions as 90 min,383 K,and 1.8 MPa.Under these conditions,the yield of aniline reached 98.2% using the amorphous Ni-Mo-P catalyst after nitrobenzene hydrogenation for 15 h,indicating excellent activity stability of the amorphous Ni-Mo-P catalyst.Deactivation of the amorphous Ni-Mo-P catalyst was due mainly to nitrobenzene hydrogenation byproducts covering the catalyst activity sites,which made it difficult for reactant molecules to access the catalyst activity sites and was highly unfavorable to the catalytic reaction.

关 键 词：非晶态Ni-P催化剂 Mo改性 硝基苯 加氢 苯胺 

分 类 号：TQ426.6[化学工程]