Title:
METHOD FOR REMOVING NITROGEN
Document Type and Number:
WIPO Patent Application WO/2010/051970
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. The still liquid or partially evaporated methane-rich fraction (5') is supplied to a circulation container (D), only the liquid portion of the methane-rich fraction (5') accumulated in the circulation container (D) is completely evaporated preferably in natural circulation and the top product (7) of the circulation container (D) is superheated (E1).
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Inventors:
BAUER HEINZ (DE)
SAPPER RAINER (DE)
GWINNER MARTIN (DE)
SCHOPFER GEORG (DE)
SAPPER RAINER (DE)
GWINNER MARTIN (DE)
SCHOPFER GEORG (DE)
Application Number:
PCT/EP2009/007878
Publication Date:
August 30, 2012
Filing Date:
November 03, 2009
Export Citation:
Assignee:
LINDE AG (DE)
BAUER HEINZ (DE)
SAPPER RAINER (DE)
GWINNER MARTIN (DE)
SCHOPFER GEORG (DE)
BAUER HEINZ (DE)
SAPPER RAINER (DE)
GWINNER MARTIN (DE)
SCHOPFER GEORG (DE)
International Classes:
F25J3/02
Foreign References:
| US3874184A | 1975-04-01 | |||
| US20040231359A1 | 2004-11-25 | |||
| DE10215125A1 | 2003-10-16 | |||
| EP0725256A1 | 1996-08-07 | |||
| US5901578A | 1999-05-11 |
Attorney, Agent or Firm:
LINDE AG (Dr.-Carl-von-Linde-Str. 6-14, Pullach, DE)
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