苯酚液相原位加氢合成环己酮和环己醇研究.pdfVIP

苯酚液相原位加氢合成环己酮和环己醇 项益智，李小年* (浙江工业大学工业催化研究所，绿色化学合成技术国家重点实验室培育基地，杭州310032， 中国) 摘 要：基于甲醇水相重整制氢反应和苯酚液相催化加氢反应使用相同类型的催化剂，比较相近的反应温度 和压力，且都在液相状态下进行的特点。本文提出：在Raney Ni催化剂的作用下，将甲醇水相重整制氢反应 产生的氢气原位地应用于苯酚加氢合成环己酮和环己醇的反应，实现了水相催化制氢和液相催化加氢两个反 应的耦合。消除了传统方法中需要专门的氢气制备、存储和输送等环节，简化了工艺、降低了生产成本。通 过这两个反应的耦合，甲醇水相重整过程中氢气选择性及其甲醇转化率也得到明显提高；同时，在Raney Ni 催化剂作用下实现了苯酚的高选择性还原（环己酮和环己醇总选择性达99 ％以上），比传统的氢气还原法具 有更好的效果。 关键词：苯酚；液相原位加氢；环己酮；环己醇；Raney Ni Liquid Phase in-Situ Hydrogenation of Phenol for Synthesis of Cyclohexanone and Cyclohexanol * XIANG Yi-zhi ，LI Xiao-nian (State Key Laboratory Breading Base of Green Chemistry Synthesis Technology, Industrial Catalysis Institute of Zhejiang University of Technology，Hangzhou 310032, China) Abstract: Based on the coupling of methanol aqueous phase reforming (APR) and catalytic hydrogenation of phenol, a novel reaction system of liquid phase in situ catalytic hydrogenation of phenol for synthesis of cyclohexanone and cyclohexanol, in which hydrogen is produced from methanol aqueous-phase reforming in the identical reactor over Raney Ni catalyst, has been proposed. The production, reservation and transportation of hydrogen gas in traditional hydrogenation procedure could be removed, which leads to the decrease of the cost and the increase of the safety significantly. In this coupling process, methanol is the raw material of aqueous-phase reforming reaction, and also is the solvent of liquid-phase hydrogenation of phenol. While hydrogen is the product of aqueous-phase reforming of methanol, at the same time, is the raw material of phenol hydrogenation reaction. Activated hydrogen generated from aqueous-phase