DEQUI - Departamento de Química

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Synthesis of a highly active Nb2O5 for 1,2-cyclohexanediol production.
(2022) Bruziquesi, Carlos Giovani Oliveira; Gabriel Filho, José Balena; Victoria, Henrique Fernandes Vieira; Krambrock, Klaus Wilhelm Heinrich; Mansur, Herman Sander; Mansur, Alexandra Ancelmo Piscitelli; Chagas, Poliane; Silva, Adilson Cândido da; Oliveira, Luiz Carlos Alves de
A commercial niobium oxide was used to form a gelled material, which was lyophilized producing a novel polyoxoniobate catalyst (L-AmNbO) containing peroxo groups. The activity of this new catalyst was assessed through oxidation reactions of the cyclohexene. In the presence of L-AmNbO catalyst, the oxidation of cyclohexene with H2O2 reached 90% of conversion after 12 h at 75 ◦C, with selectivity for 1,2-cyclohexanediol (~ 50%). The catalytic results and the surface properties of this new material indicated that it can be a promising catalyst for niobium compounds applications in the selective oxidation of cyclohexene.