Global Patent Index - EP 1316769 A1

EP 1316769 A1 2003-06-04 - Process and device for the production of ultra high purity Nitrogen from Nitrogen with lower purity

Title (en)

Process and device for the production of ultra high purity Nitrogen from Nitrogen with lower purity

Title (de)

Verfahren und Vorrichtung zur Herstellung hoch reinen Stickstoffs aus weniger reinem Stickstoff

Title (fr)

Procédé et dispositif pour la production d'azote ultra pur à partir d'azote moins pur

Publication

EP 1316769 A1 (DE)

Application

EP 02024691 A

Priority

DE 10158327 A

Abstract (en)

A process extracts ultra-pure liquid nitrogen from less pure liquid nitrogen. A feed of less pure nitrogen (6) is drawn from a reservoir and piped to a first separator column (7) which surrenders a first feed of ultra-pure nitrogen (14). An impure fraction (17) is drawn from the column (7) and piped into a second separator column (8). A second fraction (19) of ultra-pure nitrogen is drawn from the second column (8). <??>An Independent claim is also included for a commensurate assembly in which the two columns (7, 8) are linked by a condenser-evaporator (9) operating as a heat exchanger. A gaseous pure nitrogen fraction (11) is drawn from the first column (7) head and is liquefied (12) in the condenser-evaporator (9) as ultra-pure product (14). Some of the fluid (12) formed in the condenser-evaporator (9) is returned (16) to the second column (8). The first less pure (6) supply of nitrogen is introduced to the column (7) in liquid form; a second supply (10) of less pure nitrogen is introduced to the first column (7) in gaseous form. Liquid nitrogen from the first column (7) is evaporated by a heater (28). A further feed (2) of less pure nitrogen is drawn from the reservoir (1) in liquid form, evaporated (3) under pressure and returned (4) to the reservoir (1). The reservoir is initially charged under pressure from an external source.

Abstract (de)

Das Verfahren und die Vorrichtung dienen zur Herstellung hoch reinen Stickstoffs aus weniger reinem Stickstoff. Ein erster Strom (6) weniger reinen Stickstoffs wird in eine erste Trennsäule (7) eingeleitet. Der ersten Trennsäule wird ein erstes hoch reines Stickstoffprodukt (14) entnommen. Eine Unreinfraktion (17) wird aus der ersten Trennsäule (7) abgezogen und in eine zweite Trennsäule (8) eingeleitet. Der zweiten Trennsäule wird ein zweites hoch reines Stickstoffprodukt (19) entnommen. <IMAGE>

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

F25J 3/02

IPC 8 full level (invention and additional information)

F25J 3/08 (2006.01)

CPC (invention and additional information)

F25J 3/08 (2013.01); F25J 2200/06 (2013.01); F25J 2200/52 (2013.01); F25J 2210/42 (2013.01); F25J 2215/44 (2013.01); F25J 2220/44 (2013.01); F25J 2250/42 (2013.01); F25J 2290/62 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

EPO simple patent family

EP 1316769 A1 20030604; DE 10158327 A1 20030618

INPADOC legal status


2006-09-20 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20060318

2004-02-25 [AKX] PAYMENT OF DESIGNATION FEES

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

2004-01-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20031107

2003-06-04 [AK] DESIGNATED CONTRACTING STATES:

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

2003-06-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI