MULTILAYER CATALYST, PROCESS FOR THE PREPARATION AND USE THEREOF IN THE PARTIAL OXIDATION OF HYDROCARBONS IN GASEOUS PHASE

The invention relates to a multilayer catalyst for the partial oxidation of hydrocarbons in gaseous phase, comprising a monolithic ceramic or metallic substrate having a solid macroporous structure consisting of one or more structures, on which a first active layer with a crystal-line perovskitic structure is deposited, having general formula AxA' 1-xByB' 1-YO3+-delta 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 groups Ia, IIa and VIa of the periodic table of elements, B is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb, or VIII of the periodic table of elements, B' is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb or VIII of the periodic table of elements 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 delta is a number which is such that 0 <= delta <= 0, 5, a second more external active layer consisting of a dispersion of a noble metal and a possible supporting layer with a large surface area, positioned between said monolithic substrate and said first active layer with a perovskitic structure.; The invention also relates to a process for the production of said catalyst and its use for the partial oxidation of hydrocarbons in gaseous phase