EP 0299364 A3 19890315 - PROCESS AND APPARATUS FOR AIR SEPARATION BY RECTIFICATION
Title (en)
PROCESS AND APPARATUS FOR AIR SEPARATION BY RECTIFICATION
Publication
Application
Priority
DE 3722746 A 19870709
Abstract (en)
[origin: JPS6479574A] PURPOSE: To produce high purity oxygen and nitrogen by providing a two stage rectification column, a rough argon column coupled with the second stage and a high purity oxygen column coupled with the rough argon column through sideway take-out piping. CONSTITUTION: Oxygen-rich fraction from the sample at the first rectification stage 2 is taken out through piping 8, supercooled by a heat exchanger 5 and taken out from the intermediate section of higher temperature than nitrogen-rich fraction being supplied independently. A part of the oxygen-rich fraction cooled down to about -182 deg.C is fed to the intermediate section of a second rectification stage 6 and the remainder is led, as coolant, to a condenser/evaporator 9 on top of a rough argon column 10. The second rectification stage 6 operating at about -179 deg.C and about 1.6 bar separates the previously separated fraction from the first stage 2 into high purity oxygen and nitrogen. Liquid fraction is taken out from the rough argon column 10 through piping 22 and fed to a high purity oxygen column 23 and high purity liquid oxygen is taken out from the sample at the column 23 through piping 25.
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04212 (2013.01 - EP US); F25J 3/04303 (2013.01 - EP US); F25J 3/04412 (2013.01 - EP US); F25J 3/04678 (2013.01 - EP US); F25J 3/04715 (2013.01 - EP US); F25J 2200/06 (2013.01 - EP US); F25J 2200/32 (2013.01 - EP US); F25J 2200/34 (2013.01 - EP US); F25J 2200/94 (2013.01 - EP US); F25J 2205/02 (2013.01 - EP US); F25J 2215/44 (2013.01 - EP US); F25J 2215/52 (2013.01 - EP US); F25J 2215/56 (2013.01 - EP US); F25J 2220/42 (2013.01 - EP US); F25J 2220/50 (2013.01 - EP US); F25J 2250/20 (2013.01 - EP US); F25J 2250/42 (2013.01 - EP US); Y10S 62/924 (2013.01 - EP US)
Citation (search report)
- [A] EP 0173168 A2 19860305 - UNION CARBIDE CORP [US]
- [A] US 4533375 A 19850806 - ERICKSON DONALD C [US]
- [A] EP 0144430 A1 19850619 - DAIDO OXYGEN [JP]
Designated contracting state (EPC)
AT BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0299364 A2 19890118; EP 0299364 A3 19890315; EP 0299364 B1 19901227; AT E59463 T1 19910115; CN 1016460 B 19920429; CN 1031131 A 19890215; DE 3722746 A1 19890119; DE 3861437 D1 19910207; JP 2696705 B2 19980114; JP S6479574 A 19890324; US 4824453 A 19890425
DOCDB simple family (application)
EP 88110876 A 19880707; AT 88110876 T 19880707; CN 88104228 A 19880709; DE 3722746 A 19870709; DE 3861437 T 19880707; JP 16919688 A 19880708; US 21751688 A 19880711