Abstract: 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 of n(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.

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6 h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。