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

Vasant R. Choudhary; Deepa K. Dumbre

doi:10.1016/j.apcata.2010.01.007

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

Vasant R. Choudhary, Deepa K. Dumbre

National Chemical Laboratory India

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

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 (0-8 wt%) and catalyst calcination temperature (100-900 °C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz. reaction time (0-2 h) and temperature (25-94 °C)] on the process performance has also been studied. The Au/U₃O₈ catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 °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 °C. The catalyst also showed excellent reusability in the process.

Original language	British English
Pages (from-to)	252-257
Number of pages	6
Journal	Applied Catalysis A: General
Volume	375
Issue number	2
DOIs	https://doi.org/10.1016/j.apcata.2010.01.007
State	Published - 1 Mar 2010

Keywords

Au/UO catalyst
Benzaldehyde
Benzyl alcohol
Nano-gold
Partial oxidation
tert-Butyl hydroperoxide

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10.1016/j.apcata.2010.01.007

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

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 (0-8 wt%) and catalyst calcination temperature (100-900 °C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz. reaction time (0-2 h) and temperature (25-94 °C)] on the process performance has also been studied. The Au/U3O8 catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 °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 °C. The catalyst also showed excellent reusability in the process.",

keywords = "Au/UO catalyst, Benzaldehyde, Benzyl alcohol, Nano-gold, Partial oxidation, tert-Butyl hydroperoxide",

author = "Choudhary, {Vasant R.} and Dumbre, {Deepa K.}",

note = "Funding Information: VRC and DKD are grateful to the National Academy of Sciences , India, for the NASI Senior Scientist Platinum Jubilee Fellowship and Project Assistantship, respectively, and also to the CMC group (NCL, Pune) for help in the catalyst characterization. ",

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AU - Dumbre, Deepa K.

N1 - Funding Information: VRC and DKD are grateful to the National Academy of Sciences , India, for the NASI Senior Scientist Platinum Jubilee Fellowship and Project Assistantship, respectively, and also to the CMC group (NCL, Pune) for help in the catalyst characterization.

PY - 2010/3/1

Y1 - 2010/3/1

N2 - 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 (0-8 wt%) and catalyst calcination temperature (100-900 °C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz. reaction time (0-2 h) and temperature (25-94 °C)] on the process performance has also been studied. The Au/U3O8 catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 °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 °C. The catalyst also showed excellent reusability in the process.

AB - 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 (0-8 wt%) and catalyst calcination temperature (100-900 °C)] on the catalyst performance have been investigated. The influence of reaction conditions [viz. reaction time (0-2 h) and temperature (25-94 °C)] on the process performance has also been studied. The Au/U3O8 catalyst prepared by the homogeneous deposition-precipitation and calcined at 400 °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 °C. The catalyst also showed excellent reusability in the process.

KW - Au/UO catalyst

KW - Benzaldehyde

KW - Benzyl alcohol

KW - Nano-gold

KW - Partial oxidation

KW - tert-Butyl hydroperoxide

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

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