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Molecules 2017, 22(12), 2218; https://doi.org/10.3390/molecules22122218

Nb-Based Zeolites: Efficient bi-Functional Catalysts for the One-Pot Synthesis of Succinic Acid from Glucose

Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Bdul Regina Elisabeta 4-12, Bucharest 030016, Romania
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Received: 14 November 2017 / Revised: 8 December 2017 / Accepted: 12 December 2017 / Published: 14 December 2017
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Abstract

The one-pot production of succinic acid from glucose was investigated in pure hot water as solvent using Nb (0.02 and 0.05 moles%)-Beta zeolites obtained by a post-synthesis methodology. Structurally, they are comprised of residual framework Al-acid sites, extra-framework isolated Nb (V) and Nb2O5 pore-encapsulated clusters. The Nb-modified Beta-zeolites acted as bi-functional catalysts in which glucose is dehydrated to levulinic acid (LA) which, further, suffers an oxidation process to succinic acid (SA). After the optimization of the reaction conditions, that is, at 180 °C, 18 bar O2, and 12 h reaction time, the oxidation of glucose occurred with a selectivity to succinic acid as high as 84% for a total conversion. View Full-Text
Keywords: Beta-zeolite; niobium; dealumination; post-synthesis insertion; glucose; oxidation; succinic acid Beta-zeolite; niobium; dealumination; post-synthesis insertion; glucose; oxidation; succinic acid
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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El Fergani, M.; Candu, N.; Coman, S.M.; Parvulescu, V.I. Nb-Based Zeolites: Efficient bi-Functional Catalysts for the One-Pot Synthesis of Succinic Acid from Glucose. Molecules 2017, 22, 2218.

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