摘要
以改进方法合成的BZSM5分子筛为母体,采用气固相法合成了TiZSM5分子筛,并以XRD,FTIR,UVVis,XRF,SEM,ICPAES和MASNMR等手段对BZSM5和TiZSM5进行了表征,考察了TiZSM5对苯酚羟基化反应的催化性能.结果表明,合成BZSM5时的前期低温晶化有助于晶粒的减小;以其为母体制备的TiZSM5对苯酚羟基化反应具有优异的催化性能.在n(PhOH)/n(H2O2)=3,n(Me2CO)/n(PhOH)=2.7,m(cat)/m(PhOH)=5%,T=353K和t=6h的反应条件下,苯酚转化率可达20%以上.
The Ti-ZSM-5 zeolite samples were successfully synthesized via gas-solid method with B-ZSM-5 zeo- lite prepared by modified hydrothermal synthesis as precursor. The samples were characterized by XRD, FT-IR, UV-Vis, XRF, SEM, ICP-AES and MAS NMR, and their catalytic performance for hydroxylation of phenol was investigated. The results showed that the crystallization at lower temperature during the synthesis of B- ZSM-5 was advantageous to get smaller crystal size and the Ti-ZSM-5 samples prepared by using B-ZSM-5 with smaller crystal size as precursor showed better performance for hydroxylation of phenol. Under the reaction con- ditions of n（PhOH）/n（H2O2）=3, n（Me2CO）/n（PhOH） =2.7, m（cat）/m（PhOH） =5% , T=353 K and t =6 h, the phenol conversion was over 20 %.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2005年第8期660-664,共5页
基金
国家重点基础研究发展规划项目(G2000048009)
教育部新世纪优秀人才支持计划.
关键词
硼
钛
ZSM-5分子筛
气固相法
苯酚
羟基化
boron, titanium, ZSM-5 zeolite, gas-solid method, phenol, hydroxylation
