Solvent-free heteropolyacid-catalyzed glycerol ketalization at room temperature

dc.creatorSilva, M. J. da
dc.creatorJulio, A. A.
dc.creatorDorigetto, F. C. S.
dc.date2019-03-25T14:41:13Z
dc.date2019-03-25T14:41:13Z
dc.date2015
dc.date.accessioned2023-09-27T20:56:36Z
dc.date.available2023-09-27T20:56:36Z
dc.identifier2046-2069
dc.identifierhttps://doi.org/10.1039/C4RA17090C
dc.identifierhttp://www.locus.ufv.br/handle/123456789/24095
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8951347
dc.descriptionCurrently, glycerol has been produced in large amounts as a biodiesel co-product. Therefore, developing processes to convert it into more valuable chemicals has attracted significant attention. Glycerol ketals are compounds useful as synthesis intermediates, fragrance ingredients, and mainly bioadditives for diesel and gasoline, and have been produced from reactions catalyzed by mineral acids. In this work, we assessed the activity of H3PW12O40 heteropolyacid on glycerol ketalization with different ketones at room temperature and in the absence of an auxiliary solvent. The effects of the principal reaction parameters such as the reactant stoichiometry, catalyst concentration, reaction temperature, and type of carbonylic reactant were investigated. H3PW12O40 heteropolyacid was much more active than other Brønsted acid catalysts evaluated (i.e. H2SO4, p-toluenesulfonic acid, H3PMo12O40 or H4SiW12O40) and exhibited high selectivity toward five-membered (1,3-dioxolane) cyclic ketals. Although homogeneous, the heteropolyacid catalyst could be recovered and reused without a loss of activity.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherRoyal Society of Chemistry Advances
dc.relationVolume 5, Issue 55, Pages 44499–44506, 2015
dc.rightsRoyal Society of Chemistry
dc.subjectSolvent-free
dc.subjectHeteropolyacid-catalyzed glycerol
dc.titleSolvent-free heteropolyacid-catalyzed glycerol ketalization at room temperature
dc.typeArtigo


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