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Indexed by:期刊论文

Date of Publication:2008-04-25

Journal:JOURNAL OF CATALYSIS

Included Journals:SCIE、EI

Volume:255

Issue:2

Page Number:343-346

ISSN No.:0021-9517

Key Words:epoxidation; propylene; propylene oxide; urea; hydrogen peroxide; titanium silicate-1; electron paramagnetic resonance

Abstract:We compared the efficacies of urea + hydrogen peroxide (U+HP) and hydrogen peroxide (HP) as an oxidizing agent in the epoxidation of propylene catalyzed by a titanium silicate-1 (TS-1) molecular sieve. The TS-1 catalyst exhibited good performance and stability in the TS-1/(U+HP) system. EPR results showed that more active Ti-superoxo species led to better performance of TS-1 in the TS-1/(U+HP) system than in the TS-1/HP system. (c) 2008 Elsevier Inc. All rights reserved.