Solvent-free selective oxidation of benzyl alcohol to benzaldehyde by tert-butyl hydroperoxide over U3O8-supported nano-gold catalysts

TitleSolvent-free selective oxidation of benzyl alcohol to benzaldehyde by tert-butyl hydroperoxide over U3O8-supported nano-gold catalysts
Publication TypeJournal Article
Year of Publication2010
AuthorsChoudhary, VR, Dumbre, DK
JournalApplied Catalysis A-General
Volume375
Issue2
Pagination252-257
Date PublishedMAR
ISSN0926-860X
KeywordsAu/U3O8 catalyst, Benzaldehyde, Benzyl alcohol, Nano-gold, Partial oxidation, tert-Butyl hydroperoxide
Abstract

Liquid-phase oxidation of benzyl alcohol to benzaldehyde by tertiary butyl hydroperoxide over different uranium oxide supported nano-gold catalysts in the absence of a solvent has been thoroughly investigated. The influences of catalyst parameters [viz, method of gold deposition (impregnation, co-precipitation, deposition-precipitation and homogeneous deposition-precipitation), gold loading (08 wt%) and catalyst calcination temperature (100-900 degrees C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz, reaction time (0-2 h) and temperature (25-94 degrees C)] on the process performance has also been studied. The Au/U3O8 catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 degrees C showed very high activity (100% benzyl alcohol conversion with >85% selectivity for benzaldehyde) in the process for a short reaction period (0.5 h) at 94 degrees C. The catalyst also showed excellent reusability in the process. (C) 2010 Elsevier B.V. All rights reserved.

DOI10.1016/j.apcata.2010.01.007
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)3.383
Divison category: 
Chemical Engineering & Process Development