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:
Jul. 06, 2021
Filed:
May. 31, 2018
Applicant:
Air Products and Chemicals, Inc., Allentown, PA (US);
Inventors:
Qiao Zhao, Macungie, PA (US);
Donn Michael Herron, Fogelsville, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25J 3/04 (2006.01);
U.S. Cl.
CPC ...
F25J 3/04709 (2013.01); F25J 3/0409 (2013.01); F25J 3/04084 (2013.01); F25J 3/04303 (2013.01); F25J 3/04872 (2013.01); F25J 2200/32 (2013.01); F25J 2200/34 (2013.01); F25J 2200/50 (2013.01); F25J 2200/90 (2013.01); F25J 2250/40 (2013.01); F25J 2250/50 (2013.01);
Abstract
Process and apparatus for the separation of a compressed feed air stream to produce an oxygen product using a distillation column having a lower-pressure column and a higher-pressure column, a higher-pressure heat exchanger and a lower-pressure heat exchanger where the gaseous nitrogen expander receives a nitrogen-enriched fraction from a position intermediate the warmer end and the colder end of the higher-pressure heat exchanger.