Global Patent Index - EP 1052465 A1

EP 1052465 A1 2000-11-15 - Process and device for cryogenic air separation

Title (en)

Process and device for cryogenic air separation

Title (de)

Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft

Title (fr)

Procédé et appareil pour la séparation cryogénique de l'air

Publication

EP 1052465 A1 (DE)

Application

EP 99112289 A

Priority

DE 19921949 A

Abstract (en)

To maintain very low air temps., the intake air (1) is passed to an initial rectifying column (3). An overflow fraction (6,7 a given density (p) is taken in a liquid condition from a reservoir (24,16) within the first column (3), is relaxed (14,14a,18), transferred to a further process stage (5,23). The liquid level in the reservoir (24,16) is at a first level (h1) and an initial pressure (p1). The relaxed fraction is brought to a second and higher level (h2(h2 h1)) at the next stage (5,23) and is hel a second and lower pressure (p2 p1). The pressure difference DELTA p=p1 x p2 is lower than the hydrostatic pressure (phydr=p x g(h2+h1)) between the two levels, where g is the acceleration of the earth rotation. The relaxation is structured so that the developed gas bubbles reduce the density to give the pressure difference DELTA p to allow the fraction to pass to t next stage (5,23).

Abstract (de)

Das Verfahren und die Vorrichtung dienen zur Tieftemperaturzerlegung von Luft. Einsatzluft (1) wird in eine erste Rektifiziersäule (3) eingeleitet. Eine Überleitungsfraktion (6, 7) der Dichte p wird in flüssigem Zustand aus einem Reservoir (24, 16) innerhalb der ersten Rektifiziersäule (3) entnommen, entspannt (14, 14a, 18) und einem weiteren Verfahrensschritt (5, 23) zugeleitet. Der Flüssigkeitsspiegel in dem Reservoir (24, 16) steht dabei auf einem ersten Niveau h1 befindet und unter einem ersten Druck p1. Die entspannte Überleitungsfraktion wird dem weiteren Verfahrensschritt (5, 23) auf einem zweiten, höheren Niveau h2 (h2 > h1) und unter einem zweiten, niedrigeren Druck (p2 < p1) zugeführt. Die Differenz der beiden Drücke p = p1 - p2 ist kleiner als der durch eine Flüssigkeitssäule der Überleitungsfraktion zwischen dem ersten und dem zweiten Niveau erzeugten hydrostatischen Druck (phydr = · g · [h2-h1]): p = p1 - p2 < p · g · [h2 - h1](g: Erdbeschleunigung). Die Entspannung (14, 14a, 18) wird so durchgeführt, daß die beim Entspannen entstehenden Gasblasen die Dichte der Überleitungsfraktion soweit verringern, daß die Druckdifferenz p ausreicht, um die Überleitungsfraktion dem weiteren Verfahrensschritt (5, 23) zuzuführen. <IMAGE>

IPC 1-7 (main, further and additional classification)

F25J 3/02; F25J 3/04

IPC 8 full level (invention and additional information)

F25J 3/04 (2006.01)

CPC (invention and additional information)

F25J 3/04872 (2013.01); F25J 3/04412 (2013.01); F25J 3/04678 (2013.01); F25J 3/04703 (2013.01); F25J 3/04793 (2013.01); F25J 2235/06 (2013.01); F25J 2235/50 (2013.01); F25J 2235/58 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

EP 1052465 A1 20001115; EP 1052465 B1 20050511; DE 19921949 A1 20001116; ES 2242331 T3 20051101; JP 2000356463 A 20001226; KR 20010049347 A 20010615; US 6308533 B1 20011030

INPADOC legal status


2016-10-31 [PGFP IT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: IT

- Payment date: 20160621

- Year of fee payment: 18

2016-07-29 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20160622

- Year of fee payment: 18

2016-07-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20160622

- Year of fee payment: 18

2013-10-31 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: ES

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20120626

2013-10-30 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

- Effective date: 20131030

2013-04-30 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20120702

2013-03-29 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20130228

2011-11-30 [PGFP ES] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: ES

- Payment date: 20110715

- Year of fee payment: 13

2011-07-29 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20110621

- Year of fee payment: 13

2008-10-03 [REG FR CA] CHANGE OF ADDRESS

2006-05-03 [26N] NO OPPOSITION FILED

- Effective date: 20060214

2006-04-07 [ET] FR: TRANSLATION FILED

2005-11-01 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2242331 T3

2005-10-05 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20050908

2005-06-16 [REF] CORRESPONDS TO:

- Document: DE 59912043 P 20050616

2005-05-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE ES FR GB IT

2005-05-11 [REG GB FG4D] EUROPEAN PATENT GRANTED

- Free text: NOT ENGLISH

2002-10-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020829

2001-08-01 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE ES FR GB IT

2001-06-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010423

2000-11-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT

2000-11-15 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI