Catalytic gas phase oxidation of toluene to benzaldehyde and/or benzoic acid

摘要

A catalyst mass of silver vanadate and iron vanadate, optionally also including at least one rare earth metal vanadate, is used in the vapor phase oxidative conversion of toluene to benzaldehyde and/or benzoic acid using oxygen or ozone and steam according to the disclosed process. Catalyst activity and selectivity are improved.