Patent ID: 7161028

Claim:
Process for the manufacture of acrylic acid from propane, in which a gas mixture devoid of molecular oxygen and containing propane, steam, as well as, if appropriate, an inert gas, is passed over a catalyst containing molybdenum, vanadium, tellurium, oxygen and at least one other element X selected from niobium, tantalum, tungsten, titanium, aluminium, zirconium, chromium, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, antimony, bismuth, boron, indium and cerium, in order to oxidize the propane according to the following redox reaction (1): SOLID oxidized +PROPANE*SOLID reduced +ACRYLIC ACID (1) this process being characterized in that the gas mixture is also passed over a co-catalyst of formula (II) Mo 1 Bi a′ Fe b′ Co c′ Ni d′ K e′ Sb f′ Ti g′ Si h′ Ca i′ Nb j′ Te k′ Pb l′ W m′ Cu n′ (II) in which: a′ is comprised between 0.006 and 1, inclusive; b′ is comprised between 0 and 3.5, inclusive; c′ is comprised between 0 and 3.5, inclusive; d′ is comprised between 0 and 3.5, inclusive; e′ is comprised between 0 and 1, inclusive; f′ is comprised between 0 and 1, inclusive; g′ is comprised between 0 and 1, inclusive; h′ is comprised between 0 and 3.5, inclusive; i′ is comprised between 0 and 1, inclusive; j′ is comprised between 0 and 1, inclusive; k′ is comprised between 0 and 1, inclusive; l′ is comprised between 0 and 1, inclusive; m′ is comprised between 0 and 1, inclusive; and n′ is comprised between 0 and 1, inclusive.