Patent ID: 6649791
Filing Date: 2003-11-18
Classification: C07C

Abstract:
A process for the preparation of an aromatic carboxylic acid which comprises oxidizing an alkyl aromatic compound by contacting the alkyl aromatic compound with an oxygen-containing gas at a temperature in the range of 80 to 250Â° C., in the presence of a solid catalyst of the formula [MxMâ€²xâ€²(O)(RCOO)nLnâ€²]Ynâ€³ wherein M and Mâ€² are cobalt and manganese ions, x and xâ€² are each between 0 to 3, with the proviso that only one of x and xâ€² are 0, R is selected from the group consisting of an alkyl group containing 1 to 5 carbon atoms, an aryl group with 1 to 3 benzene rings, substituted alkyl and aryl group; n is between 3 to 6, L is selected from the group consisting of RCOO, pyridine, nitrogen containing organic bases, H2O and organic solvent, Y is selected from the group consisting of a halide ion, ClO4âˆ’, BF4âˆ’, PF6âˆ’, BrO3âˆ’, nâ€² and nâ€³ are each between 0 to 3, for a period of 45 to 240 minutes at a pressure ranging between 200 to 550 psig, and recovering the desired product.