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:
Jan. 10, 2023
Filed:
Apr. 03, 2020
Applicant:
L'air Liquide, Societe Anonyme Pour L'etude ET L'exploitation Des Procedes Georges Claude, Paris, FR;
Inventors:
Kenji Hirose, Kobe, JP;
Shinji Tomita, Kobe, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25J 3/04 (2006.01);
U.S. Cl.
CPC ...
F25J 3/04284 (2013.01); F25J 3/0443 (2013.01); F25J 3/04321 (2013.01); F25J 3/04412 (2013.01); F25J 3/04709 (2013.01); F25J 3/04872 (2013.01); F25J 2200/32 (2013.01); F25J 2200/50 (2013.01); F25J 2215/50 (2013.01); F25J 2215/56 (2013.01); F25J 2245/02 (2013.01); F25J 2245/58 (2013.01); F25J 2250/20 (2013.01);
Abstract
A cryogenic air separation apparatus comprises: a heat exchanger, a first rectification column, a first condenser, a second rectification column, a third rectification column, a second condenser, a high-purity oxygen rectification column, a third condenser, a nitrogen compressor, and a compressed recycled gas line Lfor introducing product nitrogen gas compressed by the first nitrogen compressor into a warm end (heat source) of an ultra-high-purity oxygen vaporizer as a compressed recycled gas.