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

    Research output: Contribution to journalArticlepeer-review

    65 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 languageBritish English
    Pages (from-to)252-257
    Number of pages6
    JournalApplied Catalysis A: General
    Volume375
    Issue number2
    DOIs
    StatePublished - 1 Mar 2010

    Keywords

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

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