Patent ID: 8158550

Claim:
A multilayer catalyst for the partial oxidation of hydrocarbons in gaseous phase, characterized in that it comprises: a monolithic ceramic or metallic substrate having a solid macroporous structure consisting of one or more body structures having pores with an average hydraulic diameter greater than 0.2 mm; on which monolithic ceramic or metallic substrate there is deposited a supporting layer of an oxide with a large surface area of from 75 to 200 m 2 /g; on which supporting layer there is deposited a first active layer with a crystalline perovskitic structure having the general formula A x A′ 1-x B y B′ 1-y O 3±δ wherein: A is a cation of at least one of the rare earth elements, A′ is a cation of at least one element selected from the group consisting of group Ia elements, group IIa elements, and group VIa elements of the periodic table, B is a cation of at least one element selected from the group consisting of group IVb elements, group Vb elements, group VIb elements, group VIIb elements, and group VIII elements of the periodic table, B′ is a cation of at least one element selected from the group consisting of group IVb elements, group Vb elements, group VIb elements, group VIIb elements, and group VIII elements of the periodic table, Mg 2+ or Al 3+ , x is a number which is such that 0≦x≦1, y is a number which is such that 0≦y≦1, and δ is a number which is such that 0≦δ≦0,5; and on which first active layer there is deposited a second more external active layer consisting of a dispersion of a noble metal.