催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (5): 474-478.

• 研究论文 • 上一篇    下一篇

离子液体中V2O5催化环己烯选择氧化合成2-环己烯酮

陶亮1,2,喻宁亚1,李标模1,谭蓉1,银董红1   

  1. 1 湖南师范大学精细催化合成研究所, 湖南长沙 410081; 2 中国科学院广州地球化学研究所, 广东广州 510640
  • 收稿日期:2007-05-25 出版日期:2007-05-25 发布日期:2011-04-28

Selective Oxidation of Cyclohexene to 2-Cyclohexene-1-one Catalyzed by V2O5 in Room-Temperature Ionic Liquids

TAO Liang1,2, YU Ningya1*, LI Biaomo1, TAN Rong1, YIN Donghong1*   

  1. 1 Institute of Fine Catalysis and Synthesis, Hunan Normal University, Changsha 410081, Hunan, China; 2 Guangzhou Institute of Geochemistry, The Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • Received:2007-05-25 Online:2007-05-25 Published:2011-04-28

PDF

965

被引次数

9

摘要： 研究了以V2O5为催化剂, H2O2为氧化剂,在室温离子液体中环己烯氧化制备2-环己烯酮的反应. 考察了离子液体种类、反应温度、催化剂用量和氧化剂用量等因素对2-环己烯酮产率的影响. 结果表明,在H2O2用量为110 mmol, V2O5/环己烯摩尔比为2%, 反应温度为313 K的条件下, 在[bmim]BF4离子液体中反应10 h后,环己烯的转化率和2-环己烯酮选择性分别为88.7%和91.1%. 对含离子液体的催化体系的重复使用性能进行了考察. 结果发现,随着使用次数的增加,环己烯的转化率以及2-环己烯酮的选择性有所下降.

关键词: 离子液体, 五氧化二钒, 环己烯, 氧化, 2-环己烯酮

Abstract: 2-Cyclohexene-1-one was synthesized via the oxidation of cyclohexene using V2O5 as the catalyst and H2O2 as the oxidant in room-temperature ionic liquids (RTILs). Compared with the reaction performed in the organic solvent of acetone, higher conversion of cyclohexene and selectivity for 2-cyclohexene-1-one were obtained in the solvent of [bmim]BF4-acetone. The effects of various RTILs, reaction temperature, and the amount of V2O5 and H2O2 on the oxidation were investigated. A conversion of 88.7% with the selectivity for 2-cyclohexene-1-one of 91.1% was obtained when the reaction was carried out in the neutral solvent of [bmim]BF4-acetone ([bmim]BF4/acetone volume ratio of 2/5) with 2% of V2O5/cyclohexene molar ratio and 110 mmol of H2O2 at 313 K for 10 h. Furthermore, the ionic liquids could be conveniently recovered for recycle use. The conversion of cyclohexene and the selectivity for 2-cyclohexene-1-one decreased slightly with the increase in the reuse times.

Key words: ionic liquid, vanadium pentoxide, cyclohexene, oxidation, 2-cyclohexene-1-one