A manufacturing plant for carrying out a process for the catalytic dehydrogenation of a first unsaturated hydrocarbon to form a second unsaturated hydrocarbon which has one olefinically unsaturated bond more than the first unsaturated hydrocarbon and otherwise an unchanged carbon skeleton, which process comprises: contacting in a first step a feed comprising the first unsaturated hydrocarbon with a first dehydrogenation catalyst having a temperature parameter T.sub.1 and a selectivity parameter S.sub.1, and contacting in a second step a reaction product of the first step comprising the first unsaturated hydrocarbon and the second unsaturated hydrocarbon with a second dehydrogenation catalyst having a temperature parameter T.sub.2 and a selectivity parameter S.sub.2, such that T.sub.1

 
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> Method for the production of C.sub.5 aldehydes and propene from a C.sub.4 stream containing 1-butene and 2-butene

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