EP 0611936 B1 19970514 - Process and installation for producing ultrapure nitrogen by air distillation
Title (en)
Process and installation for producing ultrapure nitrogen by air distillation
Title (de)
Verfahren und Anlage zur Herstellung von ultrareinem Stickstoff durch Luftdestillation
Title (fr)
Procédé et installation de production d'azote ultra-pur par distillation d'air
Publication
Application
Priority
FR 9301403 A 19930209
Abstract (en)
[origin: EP0611936A1] The installation is of the double column type (5), comprising a first column (6) for nitrogen/oxygen separation, fed with the air to be treated, and a second column (7) for nitrogen/hydrogen separation, the head of which is coupled to the chamber of the first column via an evaporator/condenser (10), and which includes a chamber evaporator (11), and a nitrogen cooling circuit (12) whose high-pressure part feeds the chamber evaporator (11) of the second column (7), then this second column itself. The installation furthermore comprises means (10; 10A) for condensing the nitrogen in the high-pressure circuit by vapourising liquid in the tank of the first column (6). <IMAGE>
IPC 1-7
IPC 8 full level
F25J 3/04 (2006.01)
CPC (source: EP US)
F25J 3/04296 (2013.01 - EP US); F25J 3/04351 (2013.01 - EP US); F25J 3/0443 (2013.01 - EP US); F25J 3/04642 (2013.01 - EP US); F25J 3/04781 (2013.01 - EP US); F25J 2200/52 (2013.01 - EP US); F25J 2200/54 (2013.01 - EP US); F25J 2215/10 (2013.01 - EP US); F25J 2215/44 (2013.01 - EP US); F25J 2240/10 (2013.01 - EP US); F25J 2240/42 (2013.01 - EP US); F25J 2245/40 (2013.01 - EP US); F25J 2250/20 (2013.01 - EP US); F25J 2250/42 (2013.01 - EP US); F25J 2250/50 (2013.01 - EP US); Y10S 62/939 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0611936 A1 19940824; EP 0611936 B1 19970514; CA 2115129 A1 19940810; DE 69403103 D1 19970619; DE 69403103 T2 19971016; FR 2701313 A1 19940812; FR 2701313 B1 19950331; JP H06241651 A 19940902; US 5440885 A 19950815
DOCDB simple family (application)
EP 94400257 A 19940207; CA 2115129 A 19940207; DE 69403103 T 19940207; FR 9301403 A 19930209; JP 1414694 A 19940208; US 18233194 A 19940118