Abstract
The lignan oxomatairesinol was synthesized from the biomass-derived lignan hydroxymatairesinol via selective aerobic oxidation over a heterogeneous gold catalyst. The catalyst was prepared by direct ion-exchange and characterized by XRD, TEM and ICP-OES methods. The reaction was carried out at 70 °C and atmospheric pressure in a semi-batch reactor. To reveal the origin of catalyst deactivation, spent catalysts were studied by TEM, XRD, nitrogen physisorption, ICP-OES, TPO, and DSC-TGA techniques. Several regeneration procedures were applied—extraction by several solvents and calcinations in the oxidizing atmosphere. The former one was found to be the most effective way for the catalyst regeneration.
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Acknowledgments
The authors express their gratitude to Dr. Lari Vähäsalo for HMR preparation and Mr. Markku Reunanen for product identification. Mr. Sten Lindholm is acknowledged for ICP-OES analysis.
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Simakova, O.A., Murzina, E.V., Leino, AR. et al. Gold Catalysts for Selective Aerobic Oxidation of the Lignan Hydroxymatairesinol to Oxomatairesinol: Catalyst Deactivation and Regeneration. Catal Lett 142, 1011–1019 (2012). https://doi.org/10.1007/s10562-012-0855-8
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DOI: https://doi.org/10.1007/s10562-012-0855-8