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:
Dec. 30, 2025
Filed:
Apr. 06, 2021
Applicant:
Linde Gmbh, Pullach, DE;
Inventor:
Dimitri Golubev, Geretsried, DE;
Assignee:
Linde GmbH, Pullach, DE;
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/04 (2006.01);
U.S. Cl.
CPC ...
F25J 3/04351 (2013.01); F25J 3/04018 (2013.01); F25J 3/0403 (2013.01); F25J 3/0409 (2013.01); F25J 3/04096 (2013.01); F25J 3/04145 (2013.01); F25J 3/04315 (2013.01); F25J 3/04412 (2013.01); F25J 3/04715 (2013.01); F25J 3/04727 (2013.01); F25J 3/04878 (2013.01); F25J 3/04963 (2013.01); F25J 2200/06 (2013.01); F25J 2200/20 (2013.01); F25J 2200/34 (2013.01); F25J 2215/52 (2013.01); F25J 2215/56 (2013.01); F25J 2235/04 (2013.01); F25J 2245/42 (2013.01); F25J 2245/50 (2013.01);
Abstract
A process for cryogenic fractionation of air uses an air fractionation plant (-) comprises a rectification column system () having a high-pressure column () operated at a pressure level of 9 to 14.5 bar, a low-pressure column () operated at a pressure level of 2 to 5 bar, and an argon column (). A recirculating stream is formed using a second top gas or a portion thereof, which is heated, compressed, cooled again, and after partial or complete liquefaction or in the unliquefied state is introduced partially or completely, or in fractions, into the first rectification column () and/or into the second rectification column ().