Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/jspui/handle/123456789/5133
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dc.contributor.authorRobles Azocar, Patrícia Alejandra-
dc.contributor.authorBrandão, Bruno Bitarães Neto Salgado-
dc.contributor.authorSousa, Líniker Fabrício de-
dc.contributor.authorGusevskaya, Elena Vitalievna-
dc.date.accessioned2015-04-17T15:40:31Z-
dc.date.available2015-04-17T15:40:31Z-
dc.date.issued2011-
dc.identifier.citationROBLES AZOCAR, P. A. et al. Solvent-free chromium catalyzed aerobic oxidation of biomass-based alkenes as a route to valuable fragrance compounds. Applied Catalysis. A, General, v. 47, p. 20-28, 2011. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926860X11001797>. Acesso em: 02 fev. 2015.pt_BR
dc.identifier.issn0926-860X-
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/5133-
dc.description.abstractChromium containing mesoporous molecular sieves MCM-41 were shown to be an efficient heterogeneous catalyst for the liquid-phase aerobic oxidation of various monoterpenic alkenes under mild solvent-free conditions. The material was prepared through a direct hydrothermal method and characterized by ICP-AES,N2 adsorption–desorption, TEM, XRD, SAXS, andH2-TPR techniques. Characterizations suggest that chromium introduced in MCM-41 is essentially incorporated in the silica framework, with no extraframework chromium oxides being detected. Various oxygenated monoterpenoids important for the flavor and fragrance industry were obtained with high combined selectivities (75–92%) at 30–40% substrate conversions. The oxidation of _-pinene led almost exclusively to allylic mono-oxygenated derivatives, whereas limonene and _-pinene gave both epoxides and allylic oxidation products. The catalyst undergoes no metal leaching and can be easily recovered and re-used. A silica-included chromium catalyst prepared through a conventional sol–gel method showed activity comparable with that of Cr- MCM-41; however, selectivity was much lower.pt_BR
dc.language.isoen_USpt_BR
dc.subjectMonoterpenespt_BR
dc.subjectOxidationpt_BR
dc.subjectOxygenpt_BR
dc.subjectChromium catalystspt_BR
dc.subjectMesoporous molecular sievespt_BR
dc.titleSolvent-free chromium catalyzed aerobic oxidation of biomass-based alkenes as a route to valuable fragrance compounds.pt_BR
dc.typeArtigo publicado em periodicopt_BR
dc.rights.licenseO periódico Applied Catalysis A: General concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3581990058792.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.apcata.2011.03.047-
Appears in Collections:DEQUI - Artigos publicados em periódicos

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