EP 0628777 B1 19981104 - Process and apparatus for obtaining argon
Title (en)
Process and apparatus for obtaining argon
Title (de)
Verfahren und Vorrichtung zur Gewinnung von Argon
Title (fr)
Procédé et dispositif d'obtention d'argon
Publication
Application
Priority
DE 4317916 A 19930528
Abstract (en)
[origin: DE4317916A1] For the isolation of argon, air is fractionated in a rectification system having at least one air fractionation column (3) and one crude argon column. An argon-containing oxygen fraction (4) is taken from the air fractionation column (3) and introduced into a crude argon column (5). In the upper region of the crude argon column (5), a crude argon fraction (6) is taken off and a first return liquid (7) is fed in. From the bottom region of the crude argon column (5), a first residue fraction (8) is taken off. The crude argon fraction (6) is introduced into the lower region of a semi-pure column (9). In the upper region of the semi-pure column (9), an argon fraction depleted in oxygen (10, 15) is taken off and a second return liquid (11) is fed in. From the lower region of the semi-pure column (9), a second residue fraction (12) is taken off, this fraction forming the first return liquid (7) for the crude argon column (5). <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP US)
F25J 3/0423 (2013.01 - EP US); F25J 3/04412 (2013.01 - EP US); F25J 3/04678 (2013.01 - EP US); F25J 3/04703 (2013.01 - EP US); F25J 2235/58 (2013.01 - EP US); F25J 2245/50 (2013.01 - EP US); Y10S 62/924 (2013.01 - EP US)
Citation (examination)
GB 2107597 A 19830505 - LUMMUS CO
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
DE 4317916 A1 19941201; DE 59407206 D1 19981210; EP 0628777 A1 19941214; EP 0628777 B1 19981104; ES 2125370 T3 19990301; US 5426946 A 19950627
DOCDB simple family (application)
DE 4317916 A 19930528; DE 59407206 T 19940511; EP 94107374 A 19940511; ES 94107374 T 19940511; US 25051194 A 19940527