The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2022
Filed:
Feb. 26, 2020
Linde Gmbh, Pullach, DE;
Helmut Fritz, Munich, DE;
LINDE GmbH, Pullach, DE;
Abstract
The present invention concerns a method () for the production of a propylene product () in which a component mixture () containing propane, propylene and hydrogen is provided using a propane dehydrogenation () to which a reaction feed () containing propane and hydrogen is subjected, the component mixture () or a part thereof being subjected as a first separation feed to a first membrane separation (), by means of which a first permeate () enriched in hydrogen with respect to the first separation feed and a first retentate () depleted in hydrogen with respect to the first separation feed and containing hydrogen, propane and propylene are formed, the first retentate () or part thereof being subjected to a second membrane separation () as a second separation feed, in which a second permeate () containing at least the predominant part of the hydrogen of the second separation feed and a second retentate containing at least the predominant part of the propane and the propylene of the second separation feed are formed, wherein the first membrane separation () is carried out using a sweep gas () containing propane and the first permeate () is obtained as a permeate () charged with propane of the sweep gas () and/or the second membrane separation () is carried out using the sweep gas () containing propane and the second permeate () is obtained as a permeate () charged with propane of the sweep gas (), and wherein the first permeate () charged with propane of the sweep gas () and/or the second permeate () charged with propane of the sweep gas or one or more parts thereof is used in the formation of the reaction feed (). A corresponding plant is also the subject of this invention.