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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleActivity, selectivity and stability of metallosilicates containing molybdenum for the epoxidation of alkenespt_BR
dc.contributor.authorArnold, Upt_BR
dc.contributor.authorda Cruz, RSpt_BR
dc.contributor.authorMandelli, Dpt_BR
dc.contributor.authorSchuchardt, Upt_BR
unicamp.authorUniv Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil Pontificia Univ Catolica Campinas, Inst Ciencias Biol & Quim, BR-13020904 Campinas, SP, Brazilpt_BR
dc.subjectepoxidationpt_BR
dc.subjectmetallosilicatespt_BR
dc.subjectmolybdenumpt_BR
dc.subjectsol-gel processpt_BR
dc.subjecttert-butyl hydroperoxidept_BR
dc.subject.wosSilica Mixed Oxidespt_BR
dc.subject.wosCatalytic-oxidationpt_BR
dc.subject.wosHydrogen-peroxidept_BR
dc.subject.wosMolecular-sievespt_BR
dc.subject.wosOlefinspt_BR
dc.subject.wosComplexespt_BR
dc.subject.wosZeolitept_BR
dc.subject.wosModelspt_BR
dc.description.abstractMicroporous metallosilicates containing various transition metals have been prepared by the acid-catalyzed sol-gel process. The catalytic activity of the materials has been tested for the epoxidation of cyclooctene with tert-butyl hydroperoxide. Silicates containing molybdenum showed high activities and epoxide selectivities. The catalytic activities of catalysts prepared with molybdenyl acetylacetonate as metal precursor are mainly due to metal leached into the homogeneous phase. A catalyst for the heterogeneous phase epoxidation was obtained, using Mo(V)isopropoxide as metal precursor. This catalyst was tested in the epoxidation of various alkenes and conversions increase in the order 1-decene approximate to alpha -pinene < 1-octene < limonene < 1-hexene < cyclooctene < cyclohexene, Quantitative conversions of cyclooctene and cyclohexene with epoxide selectivities around 98% were obtained at 373 K. The catalyst was used in five consecutive reactions and metal leaching is fairly low up to the third reaction. Information about the catalyst structure was obtained by elemental analysis, thermogravimetry, X-ray diffraction and fluorescence, N-2-physisorption, UV-VIS and FTIR spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved.pt
dc.relation.ispartofJournal Of Molecular Catalysis A-chemicalpt_BR
dc.relation.ispartofabbreviationJ. Mol. Catal. A-Chem.pt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevier Science Bvpt_BR
dc.date.issued2001pt_BR
dc.date.monthofcirculation39448pt_BR
dc.identifier.citationJournal Of Molecular Catalysis A-chemical. Elsevier Science Bv, v. 165, n. 41671, n. 149, n. 158, 2001.pt_BR
dc.language.isoenpt_BR
dc.description.volume165pt_BR
dc.description.issuenumber41671pt_BR
dc.description.firstpage149pt_BR
dc.description.lastpage158pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn1381-1169pt_BR
dc.identifier.wosidWOS:000166375300020pt_BR
dc.identifier.doi10.1016/S1381-1169(00)00408-8pt_BR
dc.date.available2014-11-16T09:43:53Z
dc.date.available2015-11-26T17:24:12Z-
dc.date.accessioned2014-11-16T09:43:53Z
dc.date.accessioned2015-11-26T17:24:12Z-
dc.description.provenanceMade available in DSpace on 2014-11-16T09:43:53Z (GMT). No. of bitstreams: 1 WOS000166375300020.pdf: 134130 bytes, checksum: 7fbb40fd1c2bc02b0b3767c5feee531e (MD5) Previous issue date: 2001en
dc.description.provenanceMade available in DSpace on 2015-11-26T17:24:12Z (GMT). No. of bitstreams: 2 WOS000166375300020.pdf: 134130 bytes, checksum: 7fbb40fd1c2bc02b0b3767c5feee531e (MD5) WOS000166375300020.pdf.txt: 31586 bytes, checksum: fcbf31adb888508a5662218a017a4298 (MD5) Previous issue date: 2001en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/54181pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/54181
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/54181-
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