catalytic fluessigphasenoxydation of nucleus brominated methylbenzolen with a source for molecular oxygen to the core benzolcarbonsaeuren brominated

摘要

1,238,224. Nuclear brominated benzene carboxylic acids. STANDARD OIL CO. 2 Dec., 1968 [4 Dec., 1967], No. 57085/68. Heading C2C. A process for producing a nuclear brominated benzene carboxylic acid comprises oxidizing a benzene having at least one nuclear bromine substituent and at least one nuclear methyl substituent with a source of molecular oxygen under liquid phase conditions in the presence of a monocarboxylic acid, preferably having two to eight carbon atoms, and in the presence of at least one metal which is a transition metal or has an atomic weight of from 50-200 and is capable of existing in two or more valence states or compound or complex thereof capable of providing ions of the metal in said monocarboxylic acid as the sole source of catalysis and preferably at a temperature upward from 50‹ C. Preferred catalysts are cobalt, manganese, cerium and mixtures thereof.