A method for the catalytic gas-phase oxidation of toluene to benzaldehyde and oxygen or ozone benzoesaeure

摘要

1,147,997. Oxidation of toluene. STAMICARBON N.V. 4 Nov., 1966 [12 Nov., 1965], No. 49632/66. Heading C2C. [Also in Division B1] Toluene is oxidized in gaseous phase using oxygen or ozone in the presence of a catalyst comprising silver vanadate and a vanadate of Pb or Tl or silver arsenate supported on a carrier, to yield benzaldehyde and on benzoic acid. The gaseous reactants may be diluted with steam. Tolyl benzaldehyde, ditolyl and carbon dioxide are by-products. Reaction may be effected between 350‹ and 450‹ C.