Title:
PROCESS AND DEVICE FOR THE CRYOGENIC SEPARATION OF A METHANE-RICH STREAM
Document Type and Number:
WIPO Patent Application WO/2012/107667
Kind Code:
A3
Abstract:
In a process for the cryogenic separation of a methane-rich feed stream (4) containing oxygen and nitrogen, the feed stream is cooled in order to produce a cooled stream, at least one portion of the cooled stream is sent to a distillation column (6), a bottom stream is withdrawn from the distillation column, the bottom stream being enriched in methane compared to the feed stream, a stream enriched in oxygen compared to the feed stream is withdrawn from the distillation column and a recycle stream (9) is introduced to the top of the column in liquid form in order to be separated, this stream being constituted by a liquid originating from the column which is enriched in methane compared to the feed stream.
Inventors:
BRIEND PIERRE (FR)
ZICK GOLO (FR)
ZICK GOLO (FR)
Application Number:
PCT/FR2012/050198
Publication Date:
August 13, 2015
Filing Date:
January 31, 2012
Export Citation:
Assignee:
AIR LIQUIDE (FR)
BRIEND PIERRE (FR)
ZICK GOLO (FR)
BRIEND PIERRE (FR)
ZICK GOLO (FR)
International Classes:
F25J3/02
Domestic Patent References:
| WO2009004207A2 | 2009-01-08 |
Foreign References:
| DE4425712A1 | 1996-01-25 | |||
| US3989478A | 1976-11-02 | |||
| DE951875C | 1956-11-08 | |||
| DE102009008229A1 | 2010-08-12 | |||
| US20060043000A1 | 2006-03-02 |
Attorney, Agent or Firm:
MERCEY, Fiona (Direction Propriété Intellectuelle75 Quai d'Orsay, Paris Cedex 07, FR)
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