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:
Sep. 02, 2003
Filed:
Oct. 31, 2002
Dirk Schwenk, Aschheim, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
In a process and apparatus used to produce krypton and/or xenon by low-temperature fractionation of air, compresses and clean charge air ( ) is introduced into a rectification system for nitrogen-oxygen separation. The rectification system includes at least a high-pressure column ( ) and a low-pressure column ( ). A krypton- and xenon-containing fraction ( ) is removed from the high-pressure column ( ) and introduced into the evaporation space of a condenser-evaporator ( ), where it is partially evaporated. A purge liquid ( ) is extracted from the evaporation space of the condenser-evaporator ( ) and fed to a krypton-xenon enrichment column ( ). A krypton-xenon concentrate ( ) is removed from the krypton-xenon enrichment column ( ). A liquid from the lower region of the krypton-xenon enrichment column ( ) is introduced into a second condenser-evaporator ( ), which is separate from the first condenser-evaporator ( ).