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:
Aug. 14, 1990
Filed:
Apr. 13, 1989
Applicant:
Inventors:
Rakesh Agrawal, Allentown, PA (US);
Steven R Auvil, Macungie, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 11 ; 62 24 ; 62 44 ;
Abstract
This invention relates to an improved cryogenic separation process employing a single pressure distillation column for the recovery of low purity, high pressure oxygen. The process uses two working fluids, i.e., high pressure air and high pressure nitrogen to effect reboil in the column. Both the condensed air and nitrogen streams are fed as reflux streams to the distillation column. The use of nitrogen reflux enhances oxygen recovery by enhancing purity of the nitrogen from the column.