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:
Dec. 10, 2013
Filed:
Oct. 19, 2007
Douglas Paul Dee, Orefield, PA (US);
Donn Michael Herron, Fogelsville, PA (US);
Jung Soo Choe, Gwynedd Valley, PA (US);
Douglas Paul Dee, Orefield, PA (US);
Donn Michael Herron, Fogelsville, PA (US);
Jung Soo Choe, Gwynedd Valley, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
An air stream is compressed in multiple stages using refrigeration derived from a refrigerant comprising natural gas for inter-stage cooling. The possibility of natural gas leaking into the air stream is reduced by use of an intermediate cooling medium ('ICM') to transfer the refrigeration from the refrigerant to the inter-stage air stream. The compressed air stream can be fed to a cryogenic air separation unit that includes an LNG-based liquefier unit from which a cold natural gas stream is withdrawn for use as said refrigerant.