Linde Aktiengesellschaft

Linde Gmbh

Desislava Tota

Helmut Fritz

Andreas Meiswinkel

Florian Winkler

Mathieu Zellhuber

Andreas Peschel

Martin Schubert

Tuat Pham Duc

Hans-Jörg Zander

Andreas Obermeier

Sean McCracken

Gunther Kracker

The invention relates to a method for producing one or more olefins and one or more carboxylic acids, in which one or more paraffins is or are subjected to an oxidative dehydrogenation. For the oxidative dehydrogenation, a reactor () having a plurality of reaction zones () is used, a gas mixture comprising the one or more paraffins is successively passed through the reaction zones (), and at least two of the reaction zones () are subject to varying temperature influences. The invention also relates to a corresponding system ().

Method and system for producing one or more olefins and one or more carboxylic acids

Proposed is a process for producing ethylene wherein using a dehydrogenation of ethane a process gas containing at least ethane, ethylene and compounds having a lower boiling point than ethane and ethylene is formed, wherein using at least a part of the process gas a separation input is formed and subjected to a low-temperature separation () in which the separation input is cooled and in which one or more condensates are separated from the separation input, wherein the condensate(s) are at least partly subjected to a low-temperature rectification to obtain a gaseous first fraction and a liquid second fraction, wherein the gaseous first fraction contains at least the ethane and the ethylene in a lower proportion than in the separation input and the compounds having a lower boiling point than ethane and ethylene in a higher proportion than in the separation input. It is provided that the first fraction is at least partly subjected to a pressure swing adsorption () by means of which a third fraction containing predominantly or exclusively ethylene and ethane and a fourth fraction containing predominantly or exclusively methane and carbon monoxide are formed. A corresponding plant () likewise forms part of the subject matter of the present invention.

Method and plant for producing ethylene

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Munich, Germany

Desislava Tota