EP 0718576 A1 19960626 - Process for separating a gaseous mixture by cryogenic distillation
Title (en)
Process for separating a gaseous mixture by cryogenic distillation
Title (de)
Verfahren zur Trennung eines Gasgemisches durch kryogene Destillation
Title (fr)
Procédé de séparation d'un mélange gazeux par distillation cryogénique
Publication
Application
Priority
FR 9415608 A 19941223
Abstract (en)
O and N are sepd. from air by cryogenic distn. in a double column (II), the incoming air from compressor (1) being precooled by heat exchange (3) with water and then by heat exchange (5) with cool gas before passing via CO2 absorbers (7) and main heat exchanger (9) to column (11). Valve (15) controls the flow of gas (13 A) to heat exchanger (5), which is used only when the temp. of water in heat exchanger (3) is too high to cool the air sufficiently on its own e.g. in summer. The gas (13 A) may be fairly pure N drawn from column (11), or recycled air. Claims are directed to process and appts.
Abstract (fr)
Afin de prérefroidir un débit de gaz à distiller, avant une étape d'épuration, on l'envoie dans un échangeur (5) où il se refroidit contre un débit de fluide frigorigène (13B). Ce fluide frigorigène est détendu au moins en partie avant de refroidir le gaz non épuré et peut être une fraction du gaz à distiller ou un produit de la distillation. Il est préférentiellement un gaz de cycle du système. Cette disposition permet de supprimer un groupe frigorifique.
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01); F25J 3/00 (2006.01); F25J 3/02 (2006.01); F25J 5/00 (2006.01)
CPC (source: EP US)
F25J 3/04157 (2013.01 - EP US); F25J 3/04187 (2013.01 - EP US); F25J 3/04254 (2013.01 - EP US); F25J 3/04284 (2013.01 - EP US); F25J 3/04345 (2013.01 - EP US); F25J 3/04357 (2013.01 - EP US); F25J 3/044 (2013.01 - EP US); F25J 3/04787 (2013.01 - EP US); F25J 2200/72 (2013.01 - EP US); F25J 2210/42 (2013.01 - EP US); F25J 2245/40 (2013.01 - EP US); F25J 2245/42 (2013.01 - EP US)
Citation (applicant)
- US 4375367 A 19830301 - PRENTICE ALAN L [GB]
- EP 0624765 A1 19941117 - PRAXAIR TECHNOLOGY INC [US]
- JP S54103777 A 19790815 - HITACHI LTD
- EP 0505812 A1 19920930 - LINDE AG [DE]
Citation (search report)
- [A] GB 2274407 A 19940727 - BOC GROUP PLC [GB]
- [A] EP 0456575 A1 19911113 - AIR LIQUIDE [FR]
- [AD] EP 0624765 A1 19941117 - PRAXAIR TECHNOLOGY INC [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 03, no. 123 (C - 61) 16 October 1979 (1979-10-16)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
EP 0718576 A1 19960626; EP 0718576 B1 19990901; CA 2165916 A1 19960624; CN 1133964 A 19961023; DE 69511833 D1 19991007; DE 69511833 T2 20000518; ES 2138172 T3 20000101; FR 2728663 A1 19960628; FR 2728663 B1 19970124; JP H08254389 A 19961001; US 5651271 A 19970729
DOCDB simple family (application)
EP 95402924 A 19951222; CA 2165916 A 19951221; CN 95113135 A 19951222; DE 69511833 T 19951222; ES 95402924 T 19951222; FR 9415608 A 19941223; JP 33550795 A 19951222; US 57412895 A 19951218