Cyclohexane oxidation using transition metal-containing aluminophosphates (MAPO-VFI)

• Published in: Journal of molecular catalysis. A, Chemical Vol. 117; no. 1; pp. 405 - 411
• Main Authors: Luna, Fernando J., Ukawa, Sílvio E., Wallau, Martin, Schuchardt, Ulf
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 14.03.1997; Elsevier
• Subjects: Catalysis; Catalytic oxidation; Catalytic reactions; Chemistry; Cyclohexane; Exact sciences and technology; General and physical chemistry; Metallaluminophosphates; tert-butyl hydroperoxide; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; VFI-structure; VPI-5; Catalytic oxidation; tert-butyl hydroperoxide; VFI-structure; VPI-5; Metallaluminophosphates; Cyclohexane; Hydrocarbon; Organic hydroperoxide; Transition metal; Oxidation; Cycloalkane; Experimental study; Molecular sieve; Modified material
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/S1381-1169(96)00271-3

The preparation of Co-, Cr-, Fe-, Mn-, Ti-, and V-containing aluminophosphates (MAPO) with VFI structure is described. Physico-chemical techniques were used to characterize the solids synthesized. The MAPO-VFI were compared to AlPO-VFI impregnated with the various metals confirming the isomorphous substitution of Co, Cr, Fe, and Ti into the structure. V is coordinated to defect sites and Mn probably precipitated as oxide on the crystal surface. V- and CrAPO-VFI are active catalysts for the oxidation of cyclohexane with tert-butyl hydroperoxide producing cyclohexanone with some cyclohexanol and cyclohexene. CrAPO-VFI was recycled twice without significant loss of activity. On the other hand, VAPO-VFI showed significant metal leaching.