EP 0377117 B1 19920325 - AIR SEPARATION PROCESS AND APPARATUS
Title (en)
AIR SEPARATION PROCESS AND APPARATUS
Publication
Application
Priority
DE 3840506 A 19881201
Abstract (en)
[origin: JPH02247484A] PURPOSE: To reduce the cost and driving cost of a crude argon rectifying device, by performing crude argon rectification in at least 150 theoretical plates. CONSTITUTION: A crude argon tower 24 is provided with structured fixed bed of the number corresponding to 170-200, particularly, about 180 theoretical plates and driven with a pressure in a low-pressure stage between 1.2 bar and 1.6 bar, particularly, at about 1.3 bar. Packed bed having the same low pressure drop can also be installed to the tower 24 instead of the fixed bed. Crude argon containing oxygen at a concentration of about 1 ppm only is drawn out in a gaseous state from the tower 24 through a conduit 25. Part of the crude argon is liquefied in a head-section condenser 26 and returned to the tower 24 as a return flow. The remaining part of the crude argon is condensed through heat exchange with evaporated nitrogen coming from a high-pressure stage in a crude argon liquefying device 28.
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP KR US)
F25J 3/04 (2013.01 - KR); F25J 3/04303 (2013.01 - EP US); F25J 3/04412 (2013.01 - EP US); F25J 3/04678 (2013.01 - EP US); F25J 3/04727 (2013.01 - EP US); F25J 2200/90 (2013.01 - EP US); F25J 2235/58 (2013.01 - EP US); F25J 2250/42 (2013.01 - EP US); F25J 2250/58 (2013.01 - EP US); F25J 2290/12 (2013.01 - EP US); Y10S 62/924 (2013.01 - EP US); Y10S 62/939 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0377117 A1 19900711; EP 0377117 B1 19920325; EP 0377117 B2 19950517; AT E74199 T1 19920415; AU 4582189 A 19900607; AU 617226 B2 19911121; CA 2004263 A1 19900601; CA 2004263 C 19940201; CN 1019690 B 19921230; CN 1043196 A 19900620; DE 3840506 A1 19900607; DE 3840506 C2 19920116; DE 58901041 D1 19920430; ES 2031677 T3 19921216; ES 2031677 T5 19950916; JP H02247484 A 19901003; JP H0781781 B2 19950906; KR 900009433 A 19900704; KR 950014009 B1 19951120; US 5019145 A 19910528; ZA 899186 B 19900829
DOCDB simple family (application)
EP 89122047 A 19891129; AT 89122047 T 19891129; AU 4582189 A 19891201; CA 2004263 A 19891130; CN 89108846 A 19891129; DE 3840506 A 19881201; DE 58901041 T 19891129; ES 89122047 T 19891129; JP 31047389 A 19891129; KR 890017731 A 19891201; US 44352989 A 19891130; ZA 899186 A 19891201