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Issue 8, 2020
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Aerobic oxidation of 1,6-hexanediol to adipic acid over Au-based catalysts: the role of basic supports

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Abstract

1,6-Hexanediol is one of the most relevant building blocks originating from biomass and it transforms into adipic acid for polymer synthesis. Herein, we examine the selective oxidation of 1,6-hexanediol to adipic acid over Au-based catalysts, in the aqueous phase, under base-free conditions. Particularly, the absence of a base allows the neutralization step at the end of the reaction to be avoided. The influences of various supports (MgO, BaO, NiO, and TiO2) and substrate/gold molar ratios were studied. Under the conditions used, the leaching of Mg in the mixture of MgF2 and MgO was limited by diluting the basic sites in the support. The highest selectivity to adipic acid (43%) was achieved at 110 °C under 15 bar of air in the presence of 2 wt% Au/0.6MgF2–0.4MgO.

Graphical abstract: Aerobic oxidation of 1,6-hexanediol to adipic acid over Au-based catalysts: the role of basic supports

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Article information


Submitted
29 Jan 2020
Accepted
28 Mar 2020
First published
30 Mar 2020

This article is Open Access

Catal. Sci. Technol., 2020,10, 2644-2651
Article type
Paper

Aerobic oxidation of 1,6-hexanediol to adipic acid over Au-based catalysts: the role of basic supports

N. Capece, A. Sadier, C. Palombo Ferraz, J. Thuriot-Roukos, M. Pietrowski, M. Zieliński, S. Paul, F. Cavani and R. Wojcieszak, Catal. Sci. Technol., 2020, 10, 2644
DOI: 10.1039/D0CY00183J

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