Global Patent Index - EP 1469265 A1

EP 1469265 A1 20041020 - Process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification

Title (en)

Process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification

Title (de)

Verfahren zur Stickstoffverflüssigung durch Ausnutzung der Verdampfungskälte von flüssigem Methan

Title (fr)

Procédé de liquéfaction d'azote en récupérant le froid obtenu par la vaporisation de méthane liquide

Publication

EP 1469265 A1 20041020 (EN)

Application

EP 04007031 A 20040324

Priority

IT BG20030027 A 20030408

Abstract (en)

This process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification has the characteristic of cooling with the liquid methane (1) a cryogenic fluid (5), preferably nitrogen, and then using said cryogenic fluid as coolant fluid (9,10) in two nitrogen compressor units of the nitrogen liquefier, both for the interstage coolers (11,12,13,27,28,29,30,31,32) and for the intake coolers (27) and for the final delivery coolers (19,32) of one of the nitrogen compressor unit. <??>The use of nitrogen cooled by the methane enables liquid nitrogen to be produced (3) in a liquefier consisting of the two said compressor units and a cryogenic turbine (17), with a very low specific energy consumption. <IMAGE>

IPC 1-7

F25J 1/02; F17C 9/04; F25J 3/04

IPC 8 full level

F25J 1/02 (2006.01)

CPC (source: EP)

F25J 1/0015 (2013.01); F25J 1/005 (2013.01); F25J 1/0072 (2013.01); F25J 1/0204 (2013.01); F25J 1/0222 (2013.01); F25J 1/0234 (2013.01); F25J 1/0268 (2013.01); F25J 1/0292 (2013.01); F25J 1/0297 (2013.01); F25J 3/0406 (2013.01); F25J 3/04254 (2013.01); F25J 3/04351 (2013.01); F25J 2210/62 (2013.01); F25J 2230/08 (2013.01); F25J 2230/30 (2013.01); F25J 2230/42 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1469265 A1 20041020; EP 1469265 B1 20060531; AT E328258 T1 20060615; DE 602004001004 D1 20060706; DE 602004001004 T2 20061214; ES 2264059 T3 20061216; IT BG20030027 A1 20041009; PT 1469265 E 20060929; SI 1469265 T1 20061031

DOCDB simple family (application)

EP 04007031 A 20040324; AT 04007031 T 20040324; DE 602004001004 T 20040324; ES 04007031 T 20040324; IT BG20030027 A 20030408; PT 04007031 T 20040324; SI 200430051 T 20040324