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. 23, 1992
Filed:
Aug. 22, 1990
Applicant:
Inventor:
Bao Ha, Vacaville, CA (US);
Assignee:
Liquid Air Engineering Corporation, Walnut Creek, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 11 ; 62 39 ;
Abstract
A process of producing nitrogen by cryogenic separation of air in a single distillation column process, in which cooled feed air is passed to a reboiler heat exchanger in a distillation column, whereby in the column a portion of a formed nitrogen-rich stream is used for reflux, and the remaining portion is recovered as vapor and liquid product, and a portion of a formed oxygen-rich stream is used for reflux, and a remaining portion is recovered as product, and wherein the nitrogen-rich stream is used to provide process refrigeration.