Title:
METHOD FOR REMOVING NITROGEN
Document Type and Number:
WIPO Patent Application WO/2010/051971
Kind Code:
A3
Abstract:
The invention relates to a method for removing a nitrogen-rich fraction from a feed fraction which substantially contains nitrogen and hydrocarbons. According to said method, the feed fraction is subjected to separation into a nitrogen-rich and a methane-rich fraction by rectification, the methane-rich fraction being evaporated and then superheated at as high a pressure as possible relative to the feed fraction to be cooled for refrigeration and the nitrogen-rich fraction being compressed at least temporarily and/or at least partially and being fed to the rectification reaction as a return flow. At least one partial flow (16) of the compressed (C) nitrogen-rich fraction (9') is at least temporarily expanded (f) once condensation (E1) is completed and is at least partially, preferably completely evaporated (E1) for refrigeration.
Inventors:
BAUER HEINZ (DE)
GWINNER MARTIN (DE)
GWINNER MARTIN (DE)
Application Number:
PCT/EP2009/007879
Publication Date:
August 30, 2012
Filing Date:
November 03, 2009
Export Citation:
Assignee:
LINDE AG (DE)
BAUER HEINZ (DE)
GWINNER MARTIN (DE)
BAUER HEINZ (DE)
GWINNER MARTIN (DE)
International Classes:
F25J3/02
Domestic Patent References:
| WO2000023164A2 | 2000-04-27 |
Foreign References:
| DE10215125A1 | 2003-10-16 | |||
| US20040231359A1 | 2004-11-25 | |||
| US3874184A | 1975-04-01 | |||
| EP1384966A2 | 2004-01-28 | |||
| EP0725256A1 | 1996-08-07 |
Attorney, Agent or Firm:
LINDE AG et al. (Dr.-Carl-von-Linde-Str. 6-14, Pullach, DE)
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