高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (11): 1907.

• 研究简报 • 上一篇    下一篇

纳米二氧化钛催化苯乙烯环氧化反应研究(Ⅱ)

戚建英1, 杨启云1, 刘振义1, 阚家德2, 袁波2, 莫威2   

  1. 1. 云南师范大学化学系, 昆明 650031;
    2. 云南大学实验中心, 昆明 650091
  • 收稿日期:2000-06-09 出版日期:2001-11-24 发布日期:2001-11-24
  • 通讯作者: 戚建英(1962年出生),女,博士,副教授,从事均相催化研究.
  • 基金资助:

    云南省教育委员会应用基础研究基金资助

Styrene Epoxidation with t-Butyl Hydroperoxide Catalyzed by Nanometer TiO2(Ⅱ)

QI Jian-Ying1, YANG Qi-Yun1, LIU Zhen-Yi1, KAN Jia-De2, YUAN Bo2, MO Wei2   

  1. 1. Department of Chemistry, Yunnan Normal University, Kunming 650031, China;
    2. Center of Experiment, Yunnan University, Kunming 650091, China
  • Received:2000-06-09 Online:2001-11-24 Published:2001-11-24

PDF (PC)

被引次数

20

关键词: 纳米二氧化钛, 催化, 苯乙烯环氧化

Abstract: The catalysts of nanometer TiO2/BuOHand hydrous TiO2 were prepared by the liquid phase method from Ti(SO4)2. The properties of the catalysts were characterized by TG-DTA, IR, XRD, TEMmethods. The results showed that nanometer TiO2/BuOHwas anatase particles with10 nm×20 nm. The main product in styrene epoxidation with t butyl hydroperoxide(TBPH) was styrene epoxide, by product was phenylformaldehyde under the condition of 80 ℃ for 6 h. Hydrous TiO2 prepared below 260 ℃ was non crystal powder and converted into anatase particles with10 nm×300 nm when it was roasted at 500 ℃. The catalytic activity of10 nm×300 nm anatase particles had only 50% that of particles with10 nm×20 nm. The centers of acid on the catalyst surface made the epoxide selectivity decrease obviously. The order of the influence of solvent on epoxidation reaction:1,2 dichloroethane>butanol>cyclohexanone>methyl cyclohexane>cyclohexanol>acetic acid.

Key words: Nanometer TiO2, Catalysis, Styrene epoxidation

中图分类号: 

TrendMD: