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:
Mar. 10, 1981
Filed:
May. 01, 1980
Applicant:
Inventor:
Walter J Olszewski, Tonawanda, NY (US);
Assignee:
Union Carbide Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 13 ; 62 29 ; 62 38 ;
Abstract
Low purity oxygen is produced by factional distillation of liquefied air in a double distillation column and an auxiliary distillation column. Feed air is supplied at two different pressures. The disclosed methods of handling intermediate oxygen-enriched liquid produced by the two columns and removing nitrogen-rich gas from the auxiliary distillation column permit the system to operate with lower energy requirements and smaller column diameter than conventional systems.