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. 30, 2009
Filed:
Apr. 19, 2006
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);
Douglas Paul Dee, Orefield, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A cryogenic air separation process is set forth wherein, in order to provide the refrigeration necessary when at least a portion of the oxygen product is desired as liquid oxygen, LNG-derived refrigeration is used to liquefy a nitrogen stream in the process. A key to the present invention is that, instead of feeding the liquefied nitrogen to the distillation column, the liquefied nitrogen is heat exchanged against the air feed to the distillation column system.