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. 09, 2014
Filed:
Jan. 23, 2009
Alexander Alekseev, Wolfratshausen, DE;
Alexander Alekseev, Wolfratshausen, DE;
Linde Aktiengesellschaft, Munich, DE;
Abstract
The invention relates to a method and a device used for the low-temperature separation of air in a distillation column system, comprising at least one high-pressure column () and a low-pressure column (). The method has a high pre-liquifaction of 30% or more. Feed air is introduced into the distillation column system. The distillation column system further has a pre-column (), the operating pressure of which is higher than the operating pressure of the high-pressure column (). A first partial stream () of the feed air is introduced into the pre-column (). The pre-column () has a head condenser (), which is configured as a condenser-evaporator having a condensation chamber and an evaporation chamber. A gaseous fraction () from the upper region of the pre-column () is introduced into the condensation chamber of the head condenser (). Fluid () formed in the condensation chamber is at least partially applied to the pre-column () as runback (). A second partial stream () of the feed air is introduced into the evaporation chamber of the head condenser ().