Catalytic compositions of the coated type comprising nickel cobalt and molybdenum and their use for the preparation of unsaturated aldehydes

摘要

Catalytic compositions including a carrier coated with an active phase based, in particular, on bismuth, molybdenum and/or tungsten, cobalt, nickel, iron and oxygen, and doped with phosphorus and at least one alkaline element, said active phase constituting 15-33 wt % of the catalytic composition, wherein the active phase has an atomic ratio 100 x (P + alkaline elements)/Ni of 0.9-10. The use of such catalytic compositions for preparing unsaturated aldehydes by oxidising the corresponding olefins is also disclosed.