EP 1063485 A1 20001227 - Device and process for air separation by cryogenic distillation
Title (en)
Device and process for air separation by cryogenic distillation
Title (de)
Vorrichtung und Verfahren zur Luftzerlegung durch Tieftemperaturrektifikation
Title (fr)
Appareil et procédé de séparation d'air par distillation cryogénique
Publication
Application
Priority
FR 9907931 A 19990622
Abstract (en)
An air separation plant has a mixing column and at least one double column with a low pressure connected to a mid-pressure column via a vaporizer-condenser. A second vaporizer-condenser vaporizes a liquid containing 22 - 70 mol% oxygen received from the low pressure column and partly condenses air to be supplied to the double column. An Independent claim is included for the following: (a) Air separation as above. Preferred Features: Untreated air is supplied direct to the bottom of the low pressure column. A nitrogen rich gas leaves the top of the mid-pressure column. Liquid from the bottom of the mid-pressure column goes partly to the second vaporizer-condenser and partly to a first level in the mid-pressure column. The vaporized liquid from the second vaporizer-condenser goes to a relatively lower level in the mid-pressure column.
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04303 (2013.01 - EP US); F25J 3/04466 (2013.01 - EP US); F25J 3/04878 (2013.01 - EP US); F25J 2200/06 (2013.01 - EP US); F25J 2235/50 (2013.01 - EP US); F25J 2250/40 (2013.01 - EP US); F25J 2250/52 (2013.01 - EP US)
Citation (search report)
- [A] EP 0381319 A1 19900808 - BOC GROUP INC [US]
- [A] US 5291737 A 19940308 - CAMBERLEIN FRANCOIS [FR], et al
- [A] US 5582035 A 19961210 - RATHBONE THOMAS [GB], et al
- [A] EP 0556516 A2 19930825 - AIR PROD & CHEM [US]
- [A] US 5765396 A 19980616 - BONAQUIST DANTE PATRICK [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1063485 A1 20001227; EP 1063485 B1 20050406; DE 60019198 D1 20050512; DE 60019198 T2 20060309; FR 2795496 A1 20001229; FR 2795496 B1 20010803; US 6339938 B1 20020122
DOCDB simple family (application)
EP 00401768 A 20000621; DE 60019198 T 20000621; FR 9907931 A 19990622; US 59940700 A 20000622