Cu/SiO_(2)催化硝基环己烷加氢反应路径  

Reaction Route of Nitrocyclohexane Hydrogenation Catalyzed by Cu/SiO_(2) Catalyst

作　　者：董静[1] 刘永梅[2] 刘苏[1] 曹勇[2] 王仰东[1] DONG Jing;LIU Yongmei;LIU Su;CAO Yong;WANG Yangdong(Shanghai Research Institute of Petrochemical Technology,SINOPEC,Shanghai 201208,China;Department of Chemistry,Fudan University,Shanghai 200433,China)

机构地区：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208 [2]复旦大学化学系,上海200433

出　　处：《化学反应工程与工艺》2022年第1期56-60,共5页Chemical Reaction Engineering and Technology

摘　　要：以用于硝基环己烷还原制环己酮肟的铜基催化剂为研究对象,在釜式反应器中研究了蒸氨水热法制备的Cu/SiO_(2)催化剂催化硝基环己烷还原制环己酮肟过程中的主、副反应历程,重点考察了反应体系中水的存在对反应路径及目标产物选择性的影响。结果表明:该反应过程中环己酮肟水解反应基本不会发生,但外源水量的增加会显著促进环己酮的生成。由此可推测,在硝基环己烷加氢反应中,Cu/SiO_(2)作用下环己酮肟先是加氢生成某不稳定中间物种,中间物种进一步加氢生成氨基环己烷或者水解生成环己酮。Taking the copper based catalyst for the reduction of nitrocyclohexane to cyclohexanone oxime as the research object,the main and side reaction routes of nitrocyclohexane reduction to cyclohexanone oxime catalyzed by Cu/SiO_(2)catalyst prepared by ammonia evaporation hydrothermal method were studied in a kettle reactor,with emphasis on the effect of the presence of water in the reaction system on the reaction pathway and the selectivity of the target product.It was found that cyclohexanone oxime was stable against hydrolysis and the introduction of water would lead to formation of appreciable amounts of cyclohexanone.It was inferred that cyclohexanone oxime would be catalytically hydrogenated to an unstable intermediate,which could be further hydrogenated to cyclohexylamine or hydrolyzed to cyclohexanone.

关 键 词：硝基环己烷 环己酮肟 加氢反应 反应路径 

分 类 号：O643.38[理学—物理化学]