Comparative Baeyer-Villiger oxidation of cyclohexanone on Fe-pillared clays and iron tetrasulfophthalocyanine covalently supported on silica - 17/05/10
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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.
Le texte complet de cet article est disponible en PDF.Keywords : Lalithe Algerian clay, Fe-pillared clays, Baeyer-Villiger oxidation, Caprolactone, Homogenous catalysis, Iron phthalocyanine heterogeneous catalyst
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Vol 13 - N° 4
P. 466-472 - avril 2010 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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