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. 25, 2003
Filed:
Mar. 15, 2002
Bernard Darredeau, Sartrouville, FR;
Alain Briglia, Corze, FR;
Abstract
A mixture containing oxygen is introduced into a distillation column ( ); an intermediate stream, substantially free from impurities heavier than oxygen, is withdrawn (at ) at a level of the column located above the point ( ) of introduction of the air, the point ( ) of withdrawal being separated from this point ( ) of introduction by a distillation section ( ), particularly with packing; the stream withdrawn (at ) is sent to an oxygen purification column ( ), and a reflux liquid is distributed over the section ( ) by a distributor ( ). A predetermined non-uniformity of the distribution of the reflux liquid over the upper surface ( ) of the section ( ) is effected in at least one localized region ( ) of this surface.