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:
Dec. 31, 2002
Filed:
Sep. 13, 2001
Ralph Spoeri, Geretsried, DE;
Stefan Lochner, Grafing, DE;
Linde Aktiengesellschaft, Wieshbaden, DE;
Abstract
High-purity nitrogen is generated by low-temperature fractionation of air in a rectification system for nitrogen/oxygen separation having at least a first rectifier column ( ). Cycle nitrogen ( ) in gas form is removed from the upper region of the first rectifier column ( ) and is compressed in a cycle compressor ( ). A first part ( ) of the compressed cycle nitrogen is liquefied. A nitrogen fraction ( ) from the rectification system for nitrogen/oxygen separation is introduced ( ) into a high-purity nitrogen column ( ) having a top condenser ( ). High-purity nitrogen ( ) is removed from the upper region of the high-purity nitrogen column ( ). The refrigeration demand of the top condenser ( ) is at least partially covered by liquefied cycle nitrogen ( ).