2026-05-27T09:39:27Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/362852026-02-03T11:29:24Zcom_10630_2254col_10630_37953

Application of a two-step water:methyl isobutyl ketone:ethanol biphasic system in the production of 5-ethoxymethylfurfural from glucose Torres-Olea, Benjamín Rodríguez Carballo, Gabriela Moreno-Tost, Ramón Domine, Marcelo E. Cecilia, Juan Antonio García-Sancho, Cristina Marieles-Torres, Pedro Glucosa Combustibles In this work, the use of glucose as feedstock to produce the biofuel 5-ethoxymethylfurfural (EMF) is explored using a two-step system. The first step is optimized for the dehydration of glucose into 5-hydroxymethylfurfural (HMF) using water:methyl isobutyl ketone (MIBK) and water:MIBK:ethanol biphasic systems, with the addition of CaCl2 and Beta-zeolites as catalysts for glucose dehydration. After optimization, up to a 61 % HMF yield is obtained after 30 min at 180 ◦C. Most of the HMF generated is extracted to the organic phase due to a high partition coefficient. This phase was used in a second step, by simple separation from the aqueous phase, with fresh catalyst. In the absence of water, the ethanol present with MIBK in the organic phase is enough to etherify the HMF to produce our desired biofuel. Etherification took place with a 67 % selectivity after 3 h at 140 ◦C. The yield of HMF could be improved this way respect to a one-step reaction, and a final EMF yield of 37 % EMF yield from glucose was achieved. 2025-01-14T10:22:47Z 2025-01-14T10:22:47Z 2024-12-15 journal article Benjamín Torres-Olea, Gabriela Rodríguez-Carballo, Ramón Moreno-Tost, Marcelo E. Domine, Juan Antonio Cecilia, Cristina García-Sancho, Pedro Maireles-Torres, Application of a two-step water:methyl isobutyl ketone:ethanol biphasic system in the production of 5-ethoxymethylfurfural from glucose, Renewable Energy, Volume 240, 2025, 122125, ISSN 0960-1481, https://doi.org/10.1016/j.renene.2024.122125. https://hdl.handle.net/10630/36285 10.1016/j.renene.2024.122125 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier