苯甲酸甲酯气相原位加氢制苯甲醛.pdf

苯甲酸甲酯气相原位加氢制苯甲醛 1 2 ＊＊1 周银娟 潘国祥 李小年 浙江工业大学化学工程与材料学院，资源与环境催化研究所，浙江 杭州310014 摘要：利用Cu-MnO-Al O 双功能催化剂，将甲醇催化重整制得的原位氢直接用于苯甲酸甲 2 3 酯加氢合成无氯苯甲醛。考察了不同催化剂、反应温度、空速、酯/醇/水摩尔比等因素的影 响。在优化反应条件下，苯甲醛选择性可达到95.84 %，苯甲酸甲酯的转化率为79.87% ，要 优于传统的外加氢方法。并根据产物分布提出了苯甲酸甲酯“原位”加氢反应机制。该反应 体系由于不需要外加氢气，因此简化了反应工艺，避免了 H2 在生产、运输、存储等环节存 在的困难。 关键词：苯甲酸甲酯；原位加氢；苯甲醛；水相重整制氢 图分类号：O643 文献标识码：A ‘In situ’ Hydrogenation of methyl benzoate to benzaldehyde 1 2 ZHOU Yinjuan PAN Guoxiang LI Xiaonian (College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China.) Abstract ：The coupling reaction between hydrogen production from steaming reforming of methanol and hydrogenation of methyl benzoate(MB), were proposed to produce benzaldehyde by using the Cu-MnO-Al2O3 bi-functional catalysts. Investigate the effects of different catalyst, reaction temperature, LHSV, methyl benzoate/ methanol /water mol ratio etc. At excellent reaction condition, Cu-Mn catalyst displays good catalytic performance the selectivity of benzaldehyde reaches 95.84%, the conversion of methyl benzoate is 79.87% . which is superior to the traditional hydrogenation methods. The mechanism of ‘in situ’ hydrogenation were proposed according to the production distribution. ‘In situ’ hydrogenation method can predigest the reaction craftwork because it didn’t use additional H2, so it can prevent the difficult in production, transport, and storage of H2 . Key words :Methyl benzoate ；“In situ” hydrogenation ；Benzaldehyde ；Hydrogen production from aqueous-phase reforming 1*联系人：李小年，教授，博导，主要从事生物质转化以及涉氢反应体系研究。E-mail: xnli@zjut.edu.cn 第一作者：周银娟（1983－），女，硕士研究生。 基金项目：教育部新世纪优秀人才(NCET 04-0