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

Date
2016Author
Rodrigues, Raphael
Mandelli, Dalmo
Goncalves, Norberto Sanches [UNIFESP]
Pescarmona, Paolo P.
Carvalho, Wagner A.
Type
ArtigoISSN
1381-1169Is part of
Journal Of Molecular Catalysis A-ChemicalDOI
10.1016/j.molcata.2016.02.002Metadata
Show full item recordAbstract
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.
Citation
Journal Of Molecular Catalysis A-Chemical. Amsterdam, v. 422, p. 122-130, 2016.Keywords
NiobiumAluminum
Acetalization
Solketal
Glycerol
Sponsorship
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
FWO
START1 (KU Leuven)
Collections
- ICAQF - Artigos [1140]