Green Chemistry · 2013 · 82 citations · 58 references
Natural SciencesChemical EngineeringChemistryCatalysisMultiphase FlowReaction EngineeringCatalyst DesignCatalyst PreparationCatalytic MaterialsCatalytic MechanismsCatalytic Reaction EngineeringIndustrial Catalytic ProcessesAlcohol OxidationCatalytic Multiphase ReactorsCatalytic Process OptimizationImmobilized CatalystsOxidationSelective OxidationThree-phase Flow BehaviorThree-phase Flow Patterns
Various homogeneous and heterogeneous catalytic systems based on 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and different (co-)oxidants have been reported for the selective oxidation of alcohols. Herein we report the use of a commercially available silica-immobilized TEMPO catalyst, in combination with catalytic amounts of HNO3 as a NOx source under continuous three-phase flow conditions. First the stability of the catalyst was evaluated with benzyl alcohol and the reaction parameters were optimized. Subsequently different substrates were tested, focusing on the oxidation of renewable substrates like lactic acid and 5-hydroxymethylfurfural (HMF).
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Arné Dijksman, Arturo Marino-González, Antoni Mairata i Payeras et al. · Journal of the American Chemical Society · 2001 · 533 citations