Abstract:
The present invention relates to a method for the conversion of oxygenates to olefins, comprising the steps of (1) providing a gas stream that contains one or more ethers; and (2) contacting the gas stream provided in (1) with a catalyst; the catalyst comprising a carrier substrate and a layer applied to the substrate, wherein the layer contains one or more zeolites of an MFI-, MEL- and/or MWW-type structure.
Abstract:
The invention relates to a reactor (1) in the form of a cylinder with a vertical longitudinal axis, for performing an autothermal gas-phase dehydrogenation of a hydrocarbon-containing gas stream (2) with an oxygen-containing gas stream (3), obtaining a reaction gas mixture, on a heterogeneous catalyst, which is designed as monolith (4), wherein one or more catalytically active zones (5) are arranged in the interior of the reactor (1), each zone comprising a packing of monoliths (4) stacked one next to another and/or one on top of another and wherein a mixing zone (6) with fixed installations is provided upstream of each catalytically active zone (5). The reactor has: - one or more feeder lines (7) at the lower end thereof for the hydrocarbon-containing gas stream (2) to be dehydrogenated; - one or more feeder lines (9) that can be regulated independently of one another for the oxygen-containing gas stream (3) flowing into each of the mixing zones (6), each feeder line (9) feeding one or more distributors (10); - and one or more discharge lines (11) at the upper end of the reactor (1) for the reaction gas mixture from the autothermal gas-phase dehydrogenation, wherein the interior wall of the reactor (1) is furnished with a continuous insulation layer (13, 14, 15) and wherein the accessibility of one or each of the plurality of catalytically active zones (5) from outside the reactor is guaranteed via - one or more manholes (12), or wherein one or each of the plurality of catalytically active zones (5), each comprising a respective packing of monoliths stacked one next to another and/or one on top of an other including - the mixing zone (6) with fixed installations provided upstream of each catalytically active zone (5) - the one or more feeder lines (9) controllable independently of one another - and the one or more distributors (10) that are each fed via a respective feeder line (9), are constructed as a structural element (24) that can be individually installed or uninstalled.
Abstract:
The present invention relates to a catalyst for the conversion of oxygenates to olefins, comprising a carrier substrate and a layer applied to the substrate, the layer containing one or more zeolites of an MFI-, MEL- and/or MWW-type structure, wherein the one or more zeolites contain one or more alkaline earth metals. The invention also relates to the production and use of said catalyst and to a method for the conversion of oxygenates to olefins using the catalyst.
Abstract:
The invention relates to a method for producing synthesis gas comprising the steps of: A) forming synthesis gas by gasifying organic substances, B) converting the synthesis gas from step A), and C) possibly purifying the converted synthesis gas from step B), wherein at least one volatile transition metal compound is added to the method in at least one of the steps A) and B).
Abstract:
The present invention relates to a process for converting oxygenates to olefins, comprising (1) providing a gas stream comprising one or more ethers; (2) contacting the gas stream provided in (1) with a catalyst, the catalyst comprising - a support substrate and - a layer applied to the substrate, the layer comprising one or more zeolites of the MFI, MEL and/or MWW structure type.
Abstract:
La presente invención se refiere a un proceso para convertir oxigenatos en olefinas, que comprende (1) proporcionar una corriente gaseosa que comprende uno o varios éteres; (2) poner en contacto la corriente gaseosa proporcionada en (1) con un catalizador; donde el catalizador comprende -un sustrato de soporte y -una capa aplicada al sustrato, en donde la capa contiene una o varias zeolitas del tipo estructura de MFI, MEL y/o MWW.
Abstract:
The invention relates to a method of controlling a hydrogenation of a starting material in a hydrogenation reactor, in which the amount of hydrogen reacted in the hydrogenation is firstly determined, the ratio of the amount of hydrogen reacted to the amount of starting material fed in is then derived, this ratio is compared with a prescribed value and, finally, at least one process parameter is altered if the ratio of the amount of hydrogen reacted to the amount of starting material fed in deviates by a prescribed amount from the prescribed value.