Resumen: Several research studies related to biorefining have focused on developing routes for biomass conversion into biomaterials or platform molecules. In this work, the zeolitic imidazolate frameworks (ZIFs) ZIF-8 and ZIF-67 have been tested as catalysts in the conversion of sugars (sucrose, glucose and fructose) into methyl lactate. ZIF-8 and ZIF-67 have the same sodalite type zeolite structure but behaved differently in the sugar conversion in methanol due to the respective presence of Zn and Co in their structures. ZIF-8 has been found to be the most active for the conversion of sugars into methyl lactate (yield 42%) and was reused in four catalytic cycles. The chemical and physical effects caused by these cycles on the catalysts have been studied by several techniques (X-ray diffraction, thermogravimetric analyses, infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electronic microscopy and nitrogen adsorption). Idioma: Inglés DOI: 10.1016/j.jcat.2015.11.016 Año: 2016 Publicado en: Journal of Catalysis 334 (2016), 60-67 ISSN: 0021-9517 Factor impacto JCR: 6.844 (2016) Categ. JCR: ENGINEERING, CHEMICAL rank: 5 / 135 = 0.037 (2016) - Q1 - T1 Categ. JCR: CHEMISTRY, PHYSICAL rank: 20 / 145 = 0.138 (2016) - Q1 - T1 Factor impacto SCIMAGO: 2.451 - Physical and Theoretical Chemistry (Q1) - Catalysis (Q1)