Abstract:
A process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a reaction gas mixture input stream comprising a hydrocarbon to be dehydrogenated is conducted through a fixed catalyst bed disposed in a shaft and the reaction gas mixture input stream is generated in the shaft by metering a molecular oxygen-comprising input gas II into an input gas stream I which flows into the fixed catalyst bed in the shaft and comprises molecular hydrogen and the hydrocarbon to be dehydrogenated upstream of the fixed catalyst bed.
Abstract:
The invention relates to a reactor (1) in the form of a horizontal cylinder for carrying out autothermal gas phase dehydrogenbation of a hydrocarbon-containing gas flow (2) by means of an oxygen-containing gas flow (3), with a reaction mixture being obtained, on a heterogeneous catalyst in the form of a monolith (4), characterized in that the interior of the reactor (1) is divided by a detachable cylindrical or prismatic housing G, which is disposed in the longitudinal direction of the reactor (1), gastight in the circumferential direction and open at both end faces thereof, into an inner area A, having one or a plurality of catalytically active zones (5), in which are provided a packing of monoliths (4) stacked on, adjacent, and above one another, and, in front of each catalytically active zone (5), a mixing zone (6) having fixed installations, and an outer area B disposed coaxially to the inner area A.
Abstract:
The present invention relates to a process for preparing at least one monocyclic ketone having 4 to 20 carbon atoms by reacting a mixture G1 comprising at least one monocyclic olefin having 4 to 20 carbon atoms with a mixture G2 comprising at least dinitrogen monoxide, this reaction being carried out adiabatically.
Abstract:
The present invention relates to a process for reacting an aromatic hydrocarbon containing aromatic sulphur compounds, or a mixture of aromatic hydrocarbons containing aromatic sulphur compounds, where appropriate in the presence of hydrogen, comprising a first step of removing aromatic sulphur compounds (step a) and a second step of hydrogenating an aromatic hydrocarbon or mixture of aromatic hydrocarbons in the presence of a supported ruthenium catalyst in the presence of hydrogen (step b).
Abstract:
The invention relates to a reactor for carrying out high pressure reactions, comprising at least one tube (31), the ends of which pass through respective tube sheets (33) and connect to the tube sheets (33). The tube sheets (33) and the at least one tube (31) are enclosed by an outer shell so that an external space (39) is formed between the tube (31) and the outer shell. The tube sheets (33) each comprise at least one surface made of a nickel base alloy, and the at least one tube (31) is welded to the surface made of the nickel base alloy. The surface made of the nickel base alloy faces in the direction of the respective end of the reactor. The outer shell has a thickness sufficient to absorb stress forces that occur as a result of a difference in expansion due to a temperature difference between the tube (31) and the outer shell. The invention further relates to a method for starting up the reactor and for carrying out an exothermal reaction in the reactor.