New and efficient procedure for the oxidation of dioxybenzylic alcohols into aldehydes with Pt and Pd-based catalysts under flow reactor conditions

Тарасов, А. Л.; Kustov, L. М.; Bogolyubov, A. A.; Kiselyov, Alexander S.; Семенов, В. В.

doi:10.1016/j.apcata.2009.06.025

Cited by 29 publications

(11 citation statements)

References 42 publications

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“…The continuous-flow oxidation of vanillyl alcohol to vanillin was reported by Semenov et al 148 Yields up to 98% were obtained within the first hour of run time (Scheme 1). The mesoreactor consisted of quartz tubing (7 mm diameter, 1 mL) and was loaded with palladium catalyst on Subunit (a commercially available supporting matrix).…”

Section: Transition Metal-catalyzed Aerobic Oxidation Processes In Comentioning

confidence: 96%

“…Oxidation of vanillyl alcohol to vanillin under flow reaction conditions. 148 Kobayashi et al described the first quantitative aerobic oxidation process of both primary and secondary alcohols to its respective aldehydes and ketones in a microreactor. 149 , 150 The reactor consisted out of a wall coated, gold-immobilized, capillary column.…”

Section: Transition Metal-catalyzed Aerobic Oxidation Processes In Comentioning

confidence: 99%

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Liquid phase oxidation chemistry in continuous-flow microreactors

et al. 2016

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Continuous-flow liquid phase oxidation chemistry in microreactors receives a lot of attention as the reactor provides enhanced heat and mass transfer characteristics, safe use of hazardous oxidants, high interfacial areas, and scale-up potential. In this review, an up-to-date overview of both technological and chemical aspects of liquid phase oxidation chemistry in continuous-flow microreactors is given. A description of mass and heat transfer phenomena is provided and fundamental principles are deduced which can be used to make a judicious choice for a suitable reactor. In addition, the safety aspects of continuous-flow technology are discussed. Next, oxidation chemistry in flow is discussed, including the use of oxygen, hydrogen peroxide, ozone and other oxidants in flow. Finally, the scale-up potential for continuous-flow reactors is described.

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Section: Transition Metal-catalyzed Aerobic Oxidation Processes In Comentioning

confidence: 96%

Section: Transition Metal-catalyzed Aerobic Oxidation Processes In Comentioning

confidence: 99%

Liquid phase oxidation chemistry in continuous-flow microreactors

et al. 2016

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“…Conversion efficiency of VAL to VN was determined as follows [46,60,61]: Turn-over frequencies (TOFs) per surface atom were calculated according to:…”

Section: Photocatalytic Reactionmentioning

confidence: 99%

Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light

et al. 2020

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Here, we report an efficient and highly selective oxidation of lignin model substrate using phyto-mediated ZnFe2O4 nanoparticle using Boswellia carterii extract. The nanocatalyst with an average size of 8 nm showed excellent photocatalytic activity of the synthesized carbonyl containing products under visible light irradiation. The catalytic activity and selectivity towards oxidation of vanillyl alcohol to vanillin with selectivity up to 99% at conversion over 98% and turn-over frequency values up to 1600 h−1 were obtained in the presence of H2O2 and base. The cubic spinel nano-ZnFe2O4 catalyst was characterized by powder-XRD, FESEM, HR-TEM and Mössbauer analysis. The demonstrated catalyst was robust and stable under the reaction conditions. Furthermore, it was easy to be separated from the reaction mixture and be reused for subsequent reactions up to 5 times without significant reactivity or selectivity loss.

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“…Both wallcoated [275] and packed bed microreactor configurations [183,276,277] have been used for this purpose. Biomass oxidations performed in milli-scale (packed bed) reactors, may benefit similarly in terms of the desired product yield from transport intensification and a precise process control there, as demonstrated in the conversions of HMF to FFCA/FDCA, [269] glycerol to different C 2 /C 3 aldehydes and acids, [272][273][274] glucose to gluconic acid, [278] bioethanol to acetic acid, [279] lignin to vanillin, [280] and its derivatives (e. g., vanillyl alcohol to vanillin and piperonyl alcohol to piperonal) [281] (Figure 4). Furthermore, alternative oxidation procedures such as rigorous ozonolysis reactions can be controlled and regulated more effectively in continuous flow microreactors.…”

Section: Opportunitiesmentioning

confidence: 99%

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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Biomass as a renewable and abundantly available carbon source is a promising alternative to fossil resources for the production of chemicals and fuels. The development of biobased chemistry, along with catalyst design, has received much research attention over recent years. However, dedicated reactor concepts for the conversion of biomass and its derivatives are a relatively new research field. Continuous flow microreactors are a promising tool for process intensification, especially for reactions in multiphase systems. In this work, the potential of microreactors for the catalytic conversion of biomass derivatives to value-added chemicals and fuels is critically reviewed. Emphases are laid on the biphasic synthesis of furans from sugars, oxidation and hydrogenation of biomass derivatives. Microreactor processing has been shown capable of improving the efficiency of many biobased reactions, due to the transport intensification and a fine control over the process. Microreactors are expected to contribute in accelerating the technological development of biomass conversion and have a promising potential for industrial application in this area.

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New and efficient procedure for the oxidation of dioxybenzylic alcohols into aldehydes with Pt and Pd-based catalysts under flow reactor conditions

Cited by 29 publications

References 42 publications

Liquid phase oxidation chemistry in continuous-flow microreactors

Liquid phase oxidation chemistry in continuous-flow microreactors

Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

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