首页 | 本学科首页   官方微博 | 高级检索  
     检索      

改性钛锆复合氧化物催化环己酮肟气相Beckmann重 排反应
引用本文:毛东森,卢冠忠,陈庆龄,谢在库,张玉贤.改性钛锆复合氧化物催化环己酮肟气相Beckmann重 排反应[J].化学学报,2001,59(7):1139-1144.
作者姓名:毛东森  卢冠忠  陈庆龄  谢在库  张玉贤
作者单位:1. 华东理工大学工业催化所;上海石油化工研究院
2. 华东理工大学工业催化所,
3. 上海石油化工研究院,
摘    要:制备了经SO4^2-,PO4^3-,MoO3,WO3和B2O3改性的钛锆复合氧化物(TiO2-ZrO2)催化剂,并用常压连续流动固定床微型反应器考察了它们对环己酮肟气相Beckmann重排反应制己内酰胺的催化性能。结果表明,在反应温度300℃时,B2O3/TiO2-ZrO2具有较高的己内酰胺选择性(97.0%)和收率(96.7%),且明显高于B2O3/TiO2和B2O3/ZrO2催化剂,用N2吸附和NH3-TPD,CO2-TPD等方法对催化剂的经表面积、孔容、孔分布和表面酸、碱性分别进行了测定,讨论了这些物化性能对催化剂活性、选择性和稳定性的影响。

关 键 词:钛锆复合氧化物  催化活性  环己酮肟  气相反应  钛化合物  锆化合物  氧化硼  己内酰胺  贝克曼重排
修稿时间:2001年1月12日

Vapor-phase beckmann rearrangement of cyclohexanone oxime over modified titania-zirconia catalyst
Institution:Shanghai Res Inst of Petroleum Chem Tech.Shanghai(200137)
Abstract:The vapor-phase Beckmann rearrangement of cyclohexanone oxime to ε- caprolactam was examined over a variety of TiO2-ZrO2 mixed oxides modified by addition of sulfate, phosphate, and oxides of molybdenum, tungsten as well as boron. The catalytic reactions were performed in a continuous folw fixed-bed micro-reactor under atmospheric pressure. Boron oxide (B2O3) modified TiO2-ZrO2(B2O3/TiO2-ZrO2) showed the highest selectivity (97.0%) and yield(96.7%) of ε-caprolactam among the catalysts examined. Thses catalysts were characterized by nitrogen adsorption and temperature- programmed desorption of ammonia and carbon dioxide techniques. The effect of the physio-chemical properties of these catalysts on their catalytic performance was examined. The catalytic properties of B2O3/TiO2-ZrO2 were better than those of B2O3/TiO2 and B2O3/ZrO2.
Keywords:CATALYTIC ACTIVITY  CYCLOHEXANONE-OXIME  GAS PHASE REACTION  TITANIUM COMPOUNDS  ZIRCONIUM COMPOUNDS  BORON OXIDE  CAPROLACTAM  BECKMANN REARRANGEMENT
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《化学学报》浏览原始摘要信息
点击此处可从《化学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号