Oxidation of organic compounds

The present invention relates to a method of oxidising at least one aqueous organic compound in a triphasic reaction mixture, wherein the reaction mixture comprises at least one solid, at least one liquid and at least one gaseous constituent, wherein (i) the solid component is (a) a catalytically active composite based on (b) at least one perforated and permeable support, wherein the composite is on at least one side of the support and inside the support and (a) the composite is obtained by applying a suspension comprising at least one inorganic component having a particle size from 1 to 10 000 nm and at least one compound of at least one of the elements La, Ce, Mg, Sc, Y, Ti, Zr, Nb, V, Cr, Mo, W, Mn, Fe, B, Al, In, Tl, Si, Ge, Sn, Pb, Sb, Pd, Ru, Re, Hf, Gd, Ag, Cu, Li, K, Na, Be, Mg, Ca, Sr and Ba and Bi with at least one of the elements Zn, Al, Te, Se, S, O, Sb, As, P, N, Ge, Si, C and Ga, in suspension in a sol, and (b) the support comprises fibers of at least one material selected from the group consist