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:
May. 07, 2013
Filed:
Feb. 02, 2010
Rainer Sapper, Aufkirchen, DE;
Georg Schopfer, Munich, DE;
Daniel Garthe, Aiterhofen, DE;
Arndt Erik Schael, Garching an der Alz, DE;
Rainer Sapper, Aufkirchen, DE;
Georg Schopfer, Munich, DE;
Daniel Garthe, Aiterhofen, DE;
Arndt Erik Schael, Garching an der Alz, DE;
Linde Aktiengesellschaft, Munich, DE;
Abstract
A process is described for removing a nitrogen-rich fraction from a feed fraction containing essentially nitrogen and hydrocarbons, wherein the feed fraction is partially condensed and fractionated by rectification into a nitrogen-rich fraction and a methane-rich fraction. According to the invention during an interruption in the supply of the feed fraction, the separation column(s) (T/T) used for the fractionation by rectification and also the heat exchangers used for the partial condensation (E) of the feed fraction and the cooling and warming of process streams occurring in the fractionation by rectification (E) are kept by means of one or more differing cooling media (-) at temperature levels which correspond essentially to the temperature levels during standard operation of the separation column(s) (T/T) and the heat exchangers (E, E).