Global Patent Index - EP 1022530 A1

EP 1022530 A1 2000-07-26 - Process and device for producing nitrogen under pressure

Title (en)

Process and device for producing nitrogen under pressure

Title (de)

Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff

Title (fr)

Procédé et dispositif pour produire de l'azote sous pression

Publication

EP 1022530 A1 (DE)

Application

EP 00100823 A

Priority

DE 19902255 A

Abstract (en)

A fractionated distillation process to extract nitrogen from air uses a pressure column and a low-pressure column. Liquid nitrogen is drawn from the low-pressure column or the head condenser and released into the pressure column, and residual gas from the evaporating fluid is released from the head condenser and allowed to expand, yielding energy. A fractionated distillation process to extract nitrogen from air uses a pressure column (4) and a low-pressure column (5). A supply of air (1, 3) is introduced to the pressure column (4). An oxygen-rich liquid fraction (8, 10) is drawn from the pressure column (4) and released into the low-pressure column (5). Gaseous nitrogen (23) is released from the low-pressure column (5) to a head condenser (7) where it is in indirect contact with an evaporating fluid (20), and is at least partially condensed. Liquid nitrogen (24, 26, 28, 29, 19) is drawn from the low-pressure column (5) or the head condenser and released into the pressure column (4). Especially, residual gas (22, 31, 32, 33) from the evaporating fluid (20) is released from the head condenser and allowed to expand (34), yielding energy.

Abstract (de)

Das Verfahren und die Vorrichtung dienen zur Gewinnung von Druckstickstoff durch Tieftemperaturzerlegung von Luft in einem Rektifiziersystem, das eine Drucksäule (4) und eine Niederdrucksäule (5) aufweist. Einsatzluft (1, 3) wird in die Drucksäule (4) eingeleitet. Eine sauerstoffhaltige flüssige Fraktion (8, 10) wird der Drucksäule (4) entnommen und in die Niederdrucksäule (5) eingespeist. Gasförmiger Stickstoff (23) aus der Niederdrucksäule (5) wird in einem Kopfkondensator (7) durch indirekten Wärmeaustausch mit einer verdampfenden Flüssigkeit (20) mindestens teilweise kondensiert. Flüssiger Stickstoff (24, 26, 28, 29, 19) wird aus der Niederdrucksäule (5) oder aus deren Kopfkondensator (7) abgezogen und in die Drucksäule (4) eingeleitet. Aus der verdampfenden Flüssigkeit (20) entstandenes Restgas (22, 31, 32, 33) wird aus dem Kopfkondensator abgeführt und arbeitsleistend entspannt (34). <IMAGE>

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

F25J 3/04

IPC 8 full level (invention and additional information)

F25J 3/04 (2006.01)

CPC (invention and additional information)

F25J 3/04424 (2013.01); F25J 3/04284 (2013.01); F25J 3/0486 (2013.01); F25J 2235/42 (2013.01); F25J 2245/42 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1022530 A1 20000726; EP 1022530 B1 20050316; AT 291210 T 20050415; DE 19902255 A1 20000727

INPADOC legal status


2009-10-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

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

- Effective date: 20090801

2008-11-28 [PG25 CY] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: CY

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2008-11-28 [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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2008-05-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20080110

- Year of fee payment: 9

2008-01-31 [PG25 SE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: SE

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050616

2007-12-31 [BERE] BE: LAPSED

- Owner name: LINDE A.G.

- Effective date: 20060131

2006-09-15 [REG CH PL] PATENT CEASED

2006-05-12 [EN] FR: TRANSLATION NOT FILED

2006-03-08 [26N] NO OPPOSITION FILED

- Effective date: 20051219

2006-01-31 [PG25 BE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: BE

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

- Effective date: 20060131

2006-01-31 [PG25 CH] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: CH

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

- Effective date: 20060131

2006-01-31 [PG25 LI] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: LI

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

- Effective date: 20060131

2006-01-31 [PG25 LU] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: LU

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

- Effective date: 20060131

2006-01-31 [PG25 MC] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: MC

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

- Effective date: 20060131

2006-01-17 [PG25 AT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: AT

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

- Effective date: 20060117

2005-10-19 [REG IE FD4D] EUROPEAN PATENTS DESIGNATING IRELAND TREATED AS ALWAYS HAVING BEEN VOID

2005-10-12 [GBV] GB: EP PATENT (UK) TREATED AS ALWAYS HAVING BEEN VOID IN ACCORDANCE WITH GB SECTION 77(7)/1977

- Effective date: 20050316

2005-09-07 [PG25 PT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: PT

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050907

2005-09-01 [NLV1] NL: LAPSED OR ANNULLED DUE TO FAILURE TO FULFILL THE REQUIREMENTS OF ART. 29P AND 29M OF THE PATENTS ACT

2005-06-27 [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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050627

2005-06-16 [PG25 DK] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DK

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050616

2005-06-16 [PG25 GR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GR

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050616

2005-04-21 [REF] CORRESPONDS TO:

- Document: DE 50009751 P 20050421

2005-04-20 [REG IE FG4D] EUROPEAN PATENTS GRANTED DESIGNATING IRELAND

- Free text: GERMAN

2005-03-31 [REG CH EP] ENTRY IN THE NATIONAL PHASE

2005-03-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2005-03-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: RO

2005-03-16 [REG GB FG4D] EUROPEAN PATENT GRANTED

- Free text: NOT ENGLISH

2005-03-16 [PG25 FI] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FI

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2005-03-16 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2005-03-16 [PG25 IE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IE

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2005-03-16 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IT

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2005-03-16 [PG25 NL] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: NL

- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20050316

2002-10-23 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020909

2002-02-06 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: LINDE AG

2001-04-11 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-04-11 [AXX] PAYMENT OF EXTENSION FEES

- Free text: RO PAYMENT 20000117

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010103

2000-12-06 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: LINDE GAS AG

2000-07-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-07-26 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO PAYMENT 20000117;SI