Pd/C催化硝基环己烷氢化制备环己酮肟  

Hydrogenation of nitrocyclohexane to cyclohexanone oxime catalyzed by Pd/C

作　　者：毛丽秋[1] 吕兴[1] 李光洪[1] 尹笃林[1] 游奎一[2] 罗和安[2] 

机构地区：[1]湖南师范大学精细催化合成研究所,湖南长沙410081 [2]湘潭大学化工学院,湖南湘潭411105

出　　处：《化工进展》2009年第6期1024-1026,1031,共4页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(20736009);湖南省自然科学基金资助项目(09JJ5006)

摘　　要：以Pd/C为催化剂,溶剂存在下硝基环己烷氢化制备环己酮肟。考察了溶剂种类、催化剂用量、反应时间、反应温度等因素对催化剂性能的影响。结果表明,溶剂的种类对硝基环己烷氢化产物的选择性有很大影响,乙二胺是该反应的合适溶剂。在催化剂与硝基环己烷摩尔比为1∶100、反应温度95℃的条件下,反应6h后的硝基环己烷转化率可达100%,环己酮肟选择性可达84.2%。对硝基环己烷在碱性溶剂中氢化的反应机理作了初步探讨。Hydrogenation of nitrocyclohexane catalyzed by Pd/C catalyst was carried out under mild conditions. Effects of solvent type, catalyst amount, reaction time and reaction temperature were investigated. The solvent type significantly affects the catalyst activity and selectivity for cyclohexanone oxime. Particularly, ethylenediamine is an optimal choice for improving the selectivity for cyclohexanone oxime. Under the conditions ofn（Pd/C） ： n（nitrocyclohexan） = 1 ： 100, 95 ℃ and 6 h, the conversion of nitrocyclohexane reached to 100% and the selectivity for cyclohexanone oxime was 84.2%. A reaction mechanism is proposed.

关 键 词：硝基环己烷 氢化 环己酮肟 

分 类 号：O643[理学—物理化学]