负载型钌催化剂催化对苯醌制对苯二酚的研究.pdf

第27卷第5期
化学研究与应用
Vol 27.No5
2015年5月
gemical Research and Application
May,2015
文章编号:1004-1656(2015)05-0624-05
负载型钌催化剂催化对苯醌制对苯二酚的研究
袁果园,周慧君,刘德蓉,李霞,张爱民,冯建,熊伟”
(重庆科技学院化学化工学院,重庆401331)
摘要:采用浸渍法制备了负载型高分散纳米Ru催化剂,利用X射线衍射、X射线光电子能谱、透射电子显微
镜、N2吸附-脱附实验对催化剂进行了表征,结果显示,Ru以高分散金属态存在,其平均粒径在5nm左右。考
察了不同酸碱介质、催化剂与底物物质的量的比、反应温度、H2压力和反应时间对对苯二酚收率的影响。结
果表明,以盐酸为反应介质,以5%RvAC为催化剂, NRW/Ac in数=1:100,反应温度30℃,H2压力3.0MPa,反
应时间30min,对苯二酚的收率可达97,5%
关词:钉;催化加氢;对苯;对苯二酚
中图分类号:0625.4文献标志码:A
Study on hydrogenation of benzoquinone to hydroquinone
by supported Ru-based catalysts
YUAN Guo-yuan, ZHOU Hui-jun, LIU De-rong, LI Xia, ZHANG Ai-min FENG Jian, XIONG Wei
Colege of chemistry and chemical engineering, Chongqing University of Science and Technology, Chongqing 401331, China)
Abstract: A highly spee Ru-based caa st was prepared y mp nation method, which was chaa erized by X-ray difac
tion, X-ray photoelectron spectroscopy, transmission electron microscopy and Nitrogen adsoption-esorption experiments, respective-
ly. The results showed that ruthenium was reduced to zero valence and the average particle diameter of ruthenium crystallites was a-
bout 5nm. Ef ect of different mediums, catalyst and substrate molar ratio, ea on empea u, H pressure and reaction time on e
ield of hydroquinone was nest a, he sls showed ha h roch ori ai as eaton medium, Ru and benzoquinone molar
ratio were 100, reaction emperature 0 H pressure 3.0 Mpa, reaction time 30m n, the yield of hydroquinone reached 97.5%
Key words: ruthenium; catalytic hydrogenation; benzoquinone; hydroquinone
对苯二酚是是医药、农药、染料、橡胶等的重酸及其盐类、自主合成固体酸以及离子液体等新
要原料、中间体和助剂,广泛用于石油抗凝剂,合型催化剂的应用研究取得了较好的效果但大多处
成氨催化剂和品态聚合物等方面。传统制备于实验阶段(。蒋和雁(?以兰尼镍为催化剂,
对苯二酚的方法有苯胺氧化法り、双酚A法、苯直接催化对苯醌制得对苯二酚,尽管反应条件温
酚羟基化法和对二异丙苯氧化法?等,但上述和,生产成本低,但依然存在着对苯二酚收率还不
方法存在着原料消耗高、设备腐蚀严重、环境污染够高等向题。高土敬等?采用加入碱土金属、过
大、中间体产物易聚合等诸多问题,分子筛、杂多渡金属和稀土金属等的钯炭催化剂与对苯醌水悬
收稿目期:2014-11-24;修回日期:2015-01-18
基金项目:國家自然科学基金项目(21302237)资助;重庆市基础与前沿研究计划项目(cstc2014jgyA90004)资助;重庆科技学院研究生科技
创新项目( YKICX2014027)资助
联系人简介:熊伟(1968-),男,教授,主要从事不对称多相催化研究。E-mail:xiongwcq@163.com