纳米二氧化钛催化苯乙烯环氧化反应研究(Ⅱ)  

Styrene Epoxidation with t-Butyl Hydroperoxide Catalyzed by Nanometer TiO_2(Ⅱ)

作　　者：戚建英[1] 杨启云[1] 刘振义[1] 阚家德[2] 袁波[2] 莫威[2] 

机构地区：[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

出　　处：《高等学校化学学报》2001年第11期1907-1909,共3页Chemical Journal of Chinese Universities

基　　金：云南省教育委员会应用基础研究基金资助

摘　　要：The catalysts of nanometer TiO 2/BuOH and hydrous TiO 2 were prepared by the liquid phase method from Ti(SO 4) 2. The properties of the catalysts were characterized by TG DTA, IR, XRD, TEM methods. The results showed that nanometer TiO 2/BuOH was anatase particles with 10 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 TiO 2 prepared below 260 ℃ was non crystal powder and converted into anatase particles with 10 nm×300 nm when it was roasted at 500 ℃ . The catalytic activity of 10 nm×300 nm anatase particles had only 50% that of particles with 10 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.The catalysts of nanometer TiO 2/BuOH and hydrous TiO 2 were prepared by the liquid phase method from Ti(SO 4) 2. The properties of the catalysts were characterized by TG DTA, IR, XRD, TEM methods. The results showed that nanometer TiO 2/BuOH was anatase particles with 10 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 TiO 2 prepared below 260 ℃ was non crystal powder and converted into anatase particles with 10 nm×300 nm when it was roasted at 500 ℃ . The catalytic activity of 10 nm×300 nm anatase particles had only 50% that of particles with 10 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.

关 键 词：纳米二氧化钛 苯乙烯 环氧化 催化剂 催化活性 

分 类 号：O625.12[理学—有机化学] O643.36[理学—化学]