| abstract |
The invention relates to a method for the continuous heterogeneously catalyzed partial dehydration of at least one hydrocarbon to be dehydrated in a reactor, said reactor being produced from a composite material. On its side contacting the reaction chamber, the reactor consists of a steel B having a specific elemental composition, which, on the side facing away from the reaction chamber, is plated either directly or via an intermediate copper, or nickel or copper and nickel layer onto a steel A having a specific elemental composition. The invention also relates to methods for partial oxidations of the dehydrated hydrocarbon and to the reactor as such. Steel A is a high-grade chromium-nickel steel having a low Si content (<1% Si), e.g. of the type DIN 1.4910 or 1.4958. Steel B is a high-grade chromium-nickel steel having a higher Si content (1-4%), e.g. of the type DIN 1.4841. The composite material, due to similar thermal expansion coefficients of the individual steel layers, has a high resistance to thermal cycling, a high resistance to long-term embrittlement, carburization, metal dusting, and a reduced undesired catalytic effect. |