EP 1653183 A1 20060503 - Process and device for the cryogenic distillation of air
Title (en)
Process and device for the cryogenic distillation of air
Title (de)
Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
Title (fr)
Procédé et dispositif pour la séparation cryogénique d'air
Publication
Application
Priority
GB 0422635 A 20041012
Abstract (en)
Pressurised gaseous nitrogen ("GAN") is produced in a process in which liquid nitrogen ("LIN") is produced in a cryogenic air separation unit ("ASU") (124,150). The pressure of at least a portion of the LIN is increased (164) to produce pressurised LIN. A fluid (127) having an oxygen concentration at least equal to that of air is separated in an auxiliary cryogenic distillation column (196) to produce nitrogen-rich overhead vapour (159) and oxygen-enriched bottoms liquid (167). Heat and optionally mass is transferred (161) between at least a portion of the nitrogen-rich overhead vapour and at least a portion of the pressurised LIN to produce nitrogen-rich liquid and pressurised GAN (166). At least a portion (169) of said nitrogen-rich liquid is used as reflux to the ASU after suitable pressure adjustment (173). Such a process allows the production of high purity GAN without the loss of oxygen recovery typically observed in conventional pumped LIN cycles.
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04084 (2013.01 - EP US); F25J 3/0409 (2013.01 - EP US); F25J 3/04103 (2013.01 - EP US); F25J 3/04212 (2013.01 - EP US); F25J 3/0423 (2013.01 - EP US); F25J 3/04236 (2013.01 - EP US); F25J 3/04296 (2013.01 - EP US); F25J 3/04303 (2013.01 - EP US); F25J 3/04442 (2013.01 - EP US); F25J 2200/20 (2013.01 - EP US); F25J 2200/50 (2013.01 - EP US); F25J 2205/30 (2013.01 - EP US); F25J 2235/42 (2013.01 - EP US); F25J 2245/42 (2013.01 - EP US)
Citation (applicant)
- US 5419137 A 19950530 - SWEENEY PAUL A [US], et al
- US 4433989 A 19840228 - ERICKSON DONALD C [US]
- US 6276171 B1 20010821 - BRUGEROLLE JEAN-RENAUD [FR]
- US 5596886 A 19970128 - HOWARD HENRY E [US]
- US 4790866 A 19881213 - RATHBONE THOMAS [GB]
Citation (search report)
- [PX] DE 10339221 A1 20050324 - LINDE AG [DE]
- [X] EP 0948730 A1 19991013 - LINDE AG [DE]
- [DA] US 6202442 B1 20010320 - BRUGEROLLE JEAN RENAUD [FR]
- [A] EP 1271081 A2 20030102 - AIR PROD & CHEM [US]
- [A] DE 19933558 A1 20000928 - LINDE TECH GASE GMBH [DE]
- [A] ANONYMOUS: "Nitrogen generation process", RESEARCH DISCLOSURE, MASON PUBLICATIONS, HAMPSHIRE, GB, vol. 464, no. 96, December 2002 (2002-12-01), XP007131872, ISSN: 0374-4353
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1653183 A1 20060503; CN 1760612 A 20060419; GB 0422635 D0 20041110; US 2006075779 A1 20060413
DOCDB simple family (application)
EP 05256250 A 20051006; CN 200510113618 A 20051012; GB 0422635 A 20041012; US 24685305 A 20051006