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. 04, 2021
Filed:
Jan. 04, 2017
Applicant:
Praxair Technology, Inc., Danbury, CT (US);
Inventor:
Henry E. Howard, Grand Island, NY (US);
Assignee:
PRAXAIR TECHNOLOGY, INC., Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/02 (2006.01); F25J 3/04 (2006.01); F25J 3/08 (2006.01);
U.S. Cl.
CPC ...
F25J 3/0285 (2013.01); F25J 3/0204 (2013.01); F25J 3/028 (2013.01); F25J 3/0219 (2013.01); F25J 3/0233 (2013.01); F25J 3/0252 (2013.01); F25J 3/0257 (2013.01); F25J 3/0276 (2013.01); F25J 3/0429 (2013.01); F25J 3/08 (2013.01); F25J 2200/06 (2013.01); F25J 2200/30 (2013.01); F25J 2200/38 (2013.01); F25J 2200/72 (2013.01); F25J 2200/76 (2013.01); F25J 2200/78 (2013.01); F25J 2210/20 (2013.01); F25J 2215/04 (2013.01); F25J 2215/34 (2013.01); F25J 2215/36 (2013.01); F25J 2235/60 (2013.01); F25J 2270/02 (2013.01); F25J 2270/04 (2013.01); F25J 2270/42 (2013.01); F25J 2290/34 (2013.01);
Abstract
A system and method for argon and nitrogen extraction and liquefaction from a low-pressure tail gas of an ammonia production plant is provided. The preferred tail gas of the ammonia production plant comprises methane, nitrogen, argon, and hydrogen. The disclosed system and method provides for the methane rejection via rectification and hydrogen rejection by way of a side stripper column or phase separator. The resulting nitrogen and argon containing stream is separated and liquefied in a double column distillation system.