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:
Jun. 04, 2019
Filed:
Aug. 21, 2018
Applicant:
Henry E. Howard, Grand Island, NY (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 5/00 (2006.01);
U.S. Cl.
CPC ...
F25J 3/0285 (2013.01); F25J 3/0219 (2013.01); F25J 3/0223 (2013.01); F25J 3/0233 (2013.01); F25J 3/0257 (2013.01); F25J 3/0276 (2013.01); F25J 5/005 (2013.01); F25J 2200/04 (2013.01); F25J 2200/06 (2013.01); F25J 2200/30 (2013.01); F25J 2200/34 (2013.01); F25J 2200/38 (2013.01); F25J 2200/72 (2013.01); F25J 2200/74 (2013.01); F25J 2200/76 (2013.01); F25J 2200/78 (2013.01); F25J 2210/04 (2013.01); F25J 2210/20 (2013.01); F25J 2215/04 (2013.01); F25J 2215/20 (2013.01); F25J 2215/42 (2013.01); F25J 2215/58 (2013.01); F25J 2230/04 (2013.01); F25J 2230/20 (2013.01); F25J 2230/30 (2013.01); F25J 2235/58 (2013.01); F25J 2235/60 (2013.01); F25J 2240/02 (2013.01); F25J 2240/12 (2013.01); F25J 2245/02 (2013.01); F25J 2260/60 (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 from a feed stream comprising hydrogen, methane, nitrogen and argon, such as tail gas of an ammonia production plant is provided. The disclosed system and method provides for nitrogen-argon rectification and the methane rejection within a column system comprised of at least one distillation column. Nitrogen and argon are further separated and to produce liquid products. An argon stripping column arrangement is disclosed where residual argon is further removed from the methane-rich fuel gas and recycled back to the feed stream.