Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-04-25

Journal: JOURNAL OF CATALYSIS

Included Journals: EI、SCIE

Volume: 255

Issue: 2

Page Number: 343-346

ISSN: 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.