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:
Jul. 16, 2002
Filed:
Feb. 05, 2001
Jürgen Voit, Schondorf, DE;
Gerhard Pompl, Beilngries, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
The process and the apparatus serve for the low-temperature fractionation of air. Compressed and prepurified feed air ( ) is introduced into a rectification system for nitrogen-oxygen separation which has a pressure column ( ). At least a part of the compressed and prepurified feed air is fed ( ) to the pressure column ( ). An oxygen-enriched fraction ( ) is taken off from the pressure column ( ) and passed ( ) to a further working step ( ) within the rectification system. The oxygen-enriched fraction ( ) is taken off at least one theoretical or actual plate ( ) above the point at which the compressed and prepurified feed air ( ) is fed to the pressure column. From the bottom of the pressure column ( ) a purge fraction ( ) is removed in the. liquid state, fed in the liquid state to a purification stage ( ), in which N O is removed, and is taken off from the purification stage ( ) as purified purge fraction ( ).