Cyclohexane Oxidation Using Transition Metal-containing Aluminophosphates (mapo-vfi)

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 AIPO-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.11701/03/15405411Davis, M.E., Saldarriaga, C., Montes, C., Garces, J., Crowder, C., (1988) Nature, 331, p. 698Davis, M.E., Montes, C., Hathaway, P.E., Garces, J.M., (1989) Stud. Surf. Sci. Catal., 49, p. 199Kraushaar-Czarnetzki, B., Dogterom, R.J., Stork, W.H.J., Emeis, K.A., Van Braam Houckgeest, J.P., (1993) J. Catal., 141, p. 140Prasad, S., Yang, T.-C., (1994) Catal. Lett., 28, p. 269Shinde, R.F., Balakrishnan, I., (1991) J. Phys. D: Appl. Phys., 24, p. 1486Singh, P.S., Shaikh, R.A., Bandyopadhyay, R., Rao, B.S., (1995) J. Chem. Soc., Chem. Commun., p. 2255Issakov, J., Litvin, E., Minachev, Ch., Öhlmann, G., Scharf, V., Thome, R., Tißler, A., Unger, B., (1994) Stud. Surf. Sci. Catal., 84, p. 2005Stöcker, M., Akporiaye, D., Lillerud, K.-P., (1991) Appl. Catal. Lett., 69, pp. L7Schmidt, W., Schüth, F., Reichert, H., Unger, K., Zibrowius, B., (1992) Zeolites, 12, p. 2Arends, I.W.C.E., Sheldon, R.A., Wallau, M., Schuchardt, U., Angew. Chem., , submittedVanoppen, D.L., De Vos, D.E., Genet, M.J., Rouxhet, P.G., Jacobs, P.A., (1995) Angew. Chem. Int. Ed. Engl., 34, p. 560Rigutto, M.S., Van Bekkum, H., (1993) J. Mol. Catal., 81, p. 77Blasco, T., Concepción, P., López Nieto, J.M., Pérez-Pariente, J., (1995) J. Catal., 152, p. 1Chen, J.D., Sheldon, R.A., (1995) J. Catal., 153, p. 1Ulagappan, N., Krishnasamy, V., (1995) J. Chem. Soc., Chem. Commun., p. 37