Oxidation of pseudocumene to trimellitic acid enhanced by low gram atom ratios of zirconium to transition metal in oxidation catalyst system

摘要

Excess burning of pseudocumene, lowering concentration of use of cobalt and replace it with manganese by the use of less than the previously used 3.0 to 0.1 milligram atom of zirconium, preferable from 0.005 up to 0.075 milligram atom of zirconium, per 1.0 milligram atom of total of transition metals cobalt and manganese or cobalt, manganese and cerium.