Indexed by:
Abstract:
Mesoporous W-MCM-22 molecular sieves were prepared for the first time by directly hydrothermal synthesis using silica gel as the source of silicon, sodium tungstate as the tungsten source, piperidine as a structure-directing agent (SDA) and boric acid as a structure-supporting agent under dynamic state. The catalyst was characterized and analyzed by powder X-ray diffraction and UV-visible spectroscopy. The influence of tungsten content on catalytic performance for epoxidation of allyl alcohol was investigated. The catalytic performances of W-MCM-22 with different ratio of n(Si)/n(W) were compared with the zeolite of MCM-22 without adding sodium tungstate in synthesis. The results showed that the mesostructure of MCM-22 was maintained very well in W-MCM-22 as-synthesized when the ratio of n(Si)/n(W) was above 40 in the gel. The tungsten atoms entered the framework dispersively, and there was no any kind of tungsten oxide in the framework. The W-MCM-22 with n(Si)/n(W) of 40 in the gel showed better catalytic performance obviously than MCM-22 for epoxidation of allyl alcohol to glycidol, with hydrogen peroxide as oxidant in aqueous.
Keyword:
Reprint 's Address:
Email:
Version:
Source :
Acta Petrolei Sinica (Petroleum Processing Section)
ISSN: 1001-8719
CN: 11-2129/TE
Year: 2006
Issue: SUPPL.
Volume: 22
Page: 100-102
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3