Comparative Baeyer-Villiger oxidation of cyclohexanone on Fe-pillared clays and iron tetrasulfophthalocyanine covalently supported on silica |
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| Authors: | Lala Setti Belaroui Alexander B. Sorokin François Figueras Abdelkader Bengueddach Jean-Marc M. Millet |
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| Affiliation: | 1. Laboratoire de Chimie des Matériaux (LCM), faculté des Sciences, université d’Oran, LCM, BP 1524 Oran, El M’Naouer, Algeria;2. Département de Pharmacie, faculté de Médecine, université d’Oran, BP 1510 Oran, El M’Naouer, Algeria;3. Institut de recherche sur la catalyse et l’environnement (IRCELYON), UMR5256 CNRS-université Lyon 1, 2, avenue Albert-Einstein, 69626 Villeurbanne cedex, France |
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| Abstract: | The Baeyer-Villiger oxidation of cyclohexanone to caprolactone has been investigated at room temperature over AlFe-pillared clays, using oxygen as oxidant in the presence of benzaldehyde. A nearly complete conversion is observed with a selectivity into caprolactone above 80%. The observation of an induction period in the kinetics, of high activity of the non-pillared clay, and the detection of Fe traces in the reaction medium, suggest a process involving homogenous catalysis. The reaction is indeed catalysed in homogeneous phase by a few ppm of Fe. By contrast, iron phthalocyanine covalently supported on silica appears as a true heterogeneous catalyst, giving a selectivity above 95% to caprolactone at 61% conversion. |
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