Reactor for carrying out a continuous oxide hydrogenation, and method

Abstract

The invention relates to a reactor (1) for carrying out a continuous oxide hydrogenation of a feed gas flow (2) of saturated hydrocarbons, which has been previously mixed with a gas flow (3) containing oxygen, on a moving catalyst bed (4) arranged between two concentric cylindrical holding devices (5, 6) in the longitudinal direction of the reactor, leaving a central inner space (7) and an intermediate space (8) between the moving catalyst bed (4) and the inner envelope of the reactor, in order to obtain a reaction gas mixture. Said reactor (1) is characterised in that it comprises at least two reactor sections which are separated from each other and split into sub-sections by means of alternating disk-type deflector plates (10) arranged in the central inner space (7) and annular deflector plates (11) arranged in the intermediate space between the moving catalyst bed (4) and the inner envelope of the reactor. The reactor sections each comprise a mixing device (12) which is arranged in the direction of flow of the reaction gas mixture upstream of the moving catalyst bed (4), said mixing device being formed from the following elements: two or three successively arranged rows of tubes (13) comprising turbulence generators on the outer side thereof, which narrow the cross-section for the passage of the feed gas flow (2) to between 1/2 and 1/10 of the free cross-section, the oxygen-containing gas flow (3) being guided through the tubes and sprayed into the feed gas flow (2) through holes (14) in the tubes (13); in addition to a perforated plate (17) mounted upstream of the tubes (13); and a perforated plate (18) mounted downstream of the tubes (13).

Description

technical field [0001] The invention relates to a reactor for continuous oxidative dehydrogenation of a feed gas stream of saturated hydrocarbons and a method for performing continuous oxidative dehydrogenation in the reactor. Background technique [0002] Oxidative dehydrogenation is widely used in chemical technology to upgrade paraffin-containing hydrocarbons to the corresponding paraffins. Since the reaction is endothermic, an external input of heat is necessary. Industrial oxidative dehydrogenation is, for example, the oxidative dehydrogenation of propane or the oxidative dehydrogenation of butane. [0003] In the Oleflex process of the known UOP for the dehydrogenation of propane to propylene, a feed gas stream containing propane is preheated to a high temperature, typically 700°C to 750°C, and dehydrogenation over an aluminum catalyst to obtain a product stream consisting mostly of propane, propylene and hydrogen. According to the Oleflex process of UOP, the heat o...

AI Technical Summary

Problems solved by technology

The autothermal BASF process usually requires two fixed-bed reactors, which are used alternately in oxidative dehydrogenation or regeneration operation, which entails corresponding investment costs

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