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Title

Direct Hydroxylation of Phenol to Dihydroxybenzenes by H2O2 and Fe-based Metal-Organic Framework Catalyst at Room Temperature

AuthorsSalazar-Aguilar, Alma D.; Vega, Gonzalo; Casas, Jose A.; Vega-Díaz, Sofía Magdalena; Tristan, Ferdinando; Meneses-Rodríguez, David ; Belmonte, Manuel ; Quintanilla, Asunción
KeywordsFe-BTC
MOF
Phenol hydroxylation
Dihydroxybenzenes
Selective oxidation
Issue Date2-Feb-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationCatalysts 10 (2): 172 (2020)
AbstractA semi-crystalline iron-based metal-organic framework (MOF), in particular Fe-BTC, that contained 20 wt.% Fe, was sustainably synthesized at room temperature and extensively characterized. Fe-BTC nanopowders could be used as an efficient heterogeneous catalyst for the synthesis of dihydroxybenzenes (DHBZ), from phenol with hydrogen peroxide (H2O2), as oxidant under organic solvent-free conditions. The influence of the reaction temperature, H2O2 concentration and catalyst dose were studied in the hydroxylation performance of phenol and MOF stability. Fe-BTC was active and stable (with negligible Fe leaching) at room conditions. By using intermittent dosing of H2O2, the catalytic performance resulted in a high DHBZ selectivity (65%) and yield (35%), higher than those obtained for other Fe-based MOFs that typically require reaction temperatures above 70 °C. The long-term experiments in a fixed-bed flow reactor demonstrated good Fe-BTC durability at the above conditions.
Publisher version (URL)https://doi.org/10.3390/catal10020172
URIhttp://hdl.handle.net/10261/202393
DOIhttp://dx.doi.org/10.3390/catal10020172
E-ISSN2073-4344
Appears in Collections:(ICV) Artículos
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