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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
纳米
苯乙烯
苯基环氧乙烷
二氧化钛
Nanometer TiO\-2, Characterization, Styrene epoxidation
