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Patent Searching and Data


Title:
METHOD FOR DENITROGENATION OF NATURAL GAS WITH OR WITHOUT HELIUM RECOVERY
Document Type and Number:
WIPO Patent Application WO/2015/055938
Kind Code:
A3
Abstract:
The invention relates to a method for denitrogenation of natural gas by distillation, in which natural gas (11, 12) cooled in an exchange line (1) is separated in a system of columns including at least one column (2,3), a nitrogen-enriched gas (18) is drawn from one column (3) of the system of columns and is heated in the exchange line, a methane-enriched liquid (13) is drawn from one column (3) of the system of columns, pressurised and vaporised in the exchange line at at least one vaporisation pressure, and at least one portion of the cooled natural gas expands in gaseous form in a turbine (7) and is sent to one column (2) of the system of columns in gaseous form.

Inventors:
BRIGLIA ALAIN (CN)
CHOUIK SELIM (FR)
Application Number:
PCT/FR2014/052606
Publication Date:
December 03, 2015
Filing Date:
October 14, 2014
Export Citation:
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Assignee:
AIR LIQUIDE (FR)
International Classes:
F25J3/02
Foreign References:
US4948405A1990-08-14
US4758258A1988-07-19
DE10215125A12003-10-16
US4357153A1982-11-02
DE202009010874U12009-11-19
JPS5420986A1979-02-16
EP1426717A22004-06-09
US2557171A1951-06-19
Attorney, Agent or Firm:
MERCEY, Fiona (Département de la Propriété Intellectuelle7, Quai d'Orsay Paris Cedex 07, FR)
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