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:
May. 21, 2019
Filed:
Oct. 14, 2014
Applicant:
L'air Liquide, Societe Anonyme Pour L'etude ET L'exploitation Des Procedes Georges Claude, Paris, FR;
Inventor:
Benoit Davidian, Saint Maur des Fosses, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/00 (2006.01); F25J 3/04 (2006.01);
U.S. Cl.
CPC ...
F25J 3/04454 (2013.01); F25J 3/0406 (2013.01); F25J 3/0409 (2013.01); F25J 3/04187 (2013.01); F25J 3/04387 (2013.01); F25J 3/04442 (2013.01); F25J 3/04448 (2013.01); F25J 2200/08 (2013.01); F25J 2200/10 (2013.01); F25J 2200/20 (2013.01); F25J 2200/50 (2013.01); F25J 2200/54 (2013.01); F25J 2210/06 (2013.01); F25J 2235/42 (2013.01); F25J 2240/10 (2013.01); F25J 2240/42 (2013.01); F25J 2245/42 (2013.01); F25J 2290/12 (2013.01);
Abstract
The invention relates to a method for separating air by cryogenic distillation in a set of columns including a first column operating at a first pressure, a second column operating at a second pressure which is lower than the first pressure, and a third column operating at a third pressure, which is lower than the second pressure, wherein the third column includes first and second evaporator-condensers, and nitrogen from a cold compressor is sent to one of the evaporator-condensers.