Acetalization of acetone with glycerol catalyzed by niobium-aluminum mixed oxides synthesized by a sol-gel process

Acetalization of acetone with glycerol catalyzed by niobium-aluminum mixed oxides synthesized by a sol-gel process

Author Rodrigues, Raphael Google Scholar
Mandelli, Dalmo Google Scholar
Goncalves, Norberto Sanches Autor UNIFESP Google Scholar
Pescarmona, Paolo P. Google Scholar
Carvalho, Wagner A. Google Scholar
Abstract Niobium-aluminum-based catalysts were synthesized by a sol-gel process and successfully applied to the reaction of acetalization of acetone with glycerol yielding 2,2-dimethyl-1,3-dioxolane-4-methanol (solketal) and 2,2-dimethyl-1,3-dioxan-5-ol. The synthesis procedure was developed using high throughput techniques and the materials prepared with molar ratio1 Metal (1Nb:xAl): 100H(2)O: 1.5NH(4)OH (in which x =1, 0.6, 0.3, 0.1 and 0.05) were selected to be further investigated. The obtained series of mixed oxides displayed high catalytic activity reaching glycerol conversion up to 84%, with 98% of selectivity towards solketal. The physicochemical properties of the investigated catalysts were characterized by N-2-adorption/desorption, thermal analysis, X-rays diffraction, FTIR and Raman spectroscopy, and by adsorption of pyridine monitored by FT-IR spectroscopy and TGA. The catalysts are truly heterogeneous and can be reused in consecutive runs without loss of activity. (C) 2016 Elsevier B.V. All rights reserved.
Keywords Niobium
Aluminum
Acetalization
Solketal
Glycerol
xmlui.dri2xhtml.METS-1.0.item-coverage Amsterdam
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
FWO
START1 (KU Leuven)
Grant number FAPESP: 2013/21160-6
CNPq: 245705/2012-0
CNPq: 490298/2009-5
FWO: VS.025.10N
FWO: V4.520.11N
START1: STRT1/10/035
Date 2016
Published in Journal Of Molecular Catalysis A-Chemical. Amsterdam, v. 422, p. 122-130, 2016.
ISSN 1381-1169 (Sherpa/Romeo, impact factor)
Publisher Elsevier Science Bv
Extent 122-130
Origin http://dx.doi.org/10.1016/j.molcata.2016.02.002
Access rights Closed access
Type Article
Web of Science ID WOS:000384789200015
URI https://repositorio.unifesp.br/handle/11600/57025

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