纳米二氧化钛催化苯乙烯环氧化反应的研究(Ⅰ)  

Styrene Epoxidation with \%t\%\|Butyl Hydroperoxide \= Catalyzed by Nanometer TiO\-2()

作　　者：戚建英[1,2] 杨启云 刘振义[1,2] 李贤均 

机构地区：[1]四川大学化学系 [2]云南教育学院

出　　处：《高等学校化学学报》1999年第4期640-642,共3页Chemical Journal of Chinese Universities

基　　金：云南省教育委员会应用基础研究资助

摘　　要：通过烯烃的环氧化反应可制得一系列活泼的有机中间体——环氧化物，再通过选择性开环或功能团转化可方便地合成多种有价值的化合物．含钛催化剂对烯烃环氧化催化效果较好，如Ｔｉ－ＺＳＭ－５［１，２］、Ｔｉ－ＺＳＭ－１１［３，４］、α－和β－［ＳｉＷ９Ｔｉ３Ｏ４０...The catalysts of nanometer TiO\-2/EtOH, nanometer TiO\-2/\%i\%\|PrOH and nanometer TiO\-2/EtOH\|BuOH were prepared by the liquid\|phase method from Ti(SO\-4)\-2 in different alcohols. The properties of the catalysts were characterized by TG\|DTA, IR, XRD and TEM methods. The results showed that the nanometer TiO\-2/\%i\%\|PrOH was 20 nm20 nm anatase particle with an excellent thermal stability. The activities and selectivities of the catalysts in styrene epoxidation with \%t\%\|butyl hydroperoxide(TBPH) were studied and compared with the commercial TiO\-2. When the oxidation was carried out under a suitable condition the main product and by product were styrene peroxide and phenylformaldehyde, respectively. The conversion of styrene and the selectivity of epoxide at 80 were 33.4% and 70.2% over the catalyst of nanometer TiO\-2/\%i\%\|PrOH, respectively. The activity of commercial TiO\-2 was only 1/3 that of nanometer TiO\-2/\%i\%\|PrOH. The \%iso\%\|propanol supported nanometer TiO\-2 improved obviously the activity and selectivity in the epoxidation of styrene.

关 键 词：纳米 苯乙烯 苯基环氧乙烷 二氧化钛 

分 类 号：O643.36[理学—物理化学] O626[理学—化学]