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DE102009016043A1 - Method for operating a pure argon column, comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product - Google Patents

Method for operating a pure argon column, comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product Download PDF

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Publication number
DE102009016043A1
DE102009016043A1 DE200910016043 DE102009016043A DE102009016043A1 DE 102009016043 A1 DE102009016043 A1 DE 102009016043A1 DE 200910016043 DE200910016043 DE 200910016043 DE 102009016043 A DE102009016043 A DE 102009016043A DE 102009016043 A1 DE102009016043 A1 DE 102009016043A1
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Prior art keywords
pure argon
argon column
column
pure
product
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DE200910016043
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German (de)
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Ralph Spöri
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Linde GmbH
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Linde GmbH
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Publication of DE102009016043A1 publication Critical patent/DE102009016043A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
    • F25J3/048—Argon recovery
    • F25J3/04806—High purity argon purification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04733—Producing pure argon, e.g. recovered from a crude argon column using a hybrid system, e.g. using adsorption, permeation or catalytic reaction
    • F25J3/04739—Producing pure argon, e.g. recovered from a crude argon column using a hybrid system, e.g. using adsorption, permeation or catalytic reaction in combination with an auxiliary pure argon column

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The method comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product. The operation of the pure argon column is supervised with one of the both measurements such as temperature profile of the pure argon column and differential pressure in the pure argon column. The operation of the pure argon column is supervised with combination of the measurements. A warning message is issued in dependent upon the current result of the measurements. The method comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product. The operation of the pure argon column is supervised with one of the both measurements such as temperature profile of the pure argon column and differential pressure in the pure argon column. The operation of the pure argon column is supervised with combination of the measurements. A warning message is issued in dependent upon the current result of the measurements. An automatic emergency shutdown of the pure argon column or the product line for the pure argon product is carried out in dependent upon the current result of the measurements. An independent claim is included for a device for obtaining pure argon.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Reinargonsäule gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to a method for operating a pure argon column according to the preamble of claim 1.

Unter einer Reinargonsäule wird hier eine Trennsäule zur Argon-Stickstofftrennung mittels Rektifikation verstanden. Eine solche wird regelmäßig bei der kryogenen Argongewinnung im Anschluss an eine Tieftemperaturluftzerlegung eingesetzt. Derartige Prozesse sind zum Beispiel aus DE 2325422 A , EP 171711 A2 , EP 377117 B2 (= US 5019145 ), DE 4030749 A1 , EP 628777 B1 (= US 5426946 ), EP 669508 A1 (= US 5592833 ), EP 669509 B1 (= US 5590544 ), EP 942246 A2 , EP 1103772 A1 , DE 19609490 (= US 5669237 ), 8, EP 1243882 A1 (= US 2002178747 A1 ) und EP 1243881 A1 (= US 2002189281 A1 ) bekannt. Die Grundlagen der Tieftemperaturzerlegung von Luft im Allgemeinen sowie der kryogenen Argongewinnung im Speziellen sind zum Beispiel in der Monografie ”Tieftemperaturtechnik” von Hausen/Linde (2. Auflage, 1985) , in einem Aufsatz von Latimer in Chemical Engineering Progress (Vol. 63, No. 2, 1967, Seite 35) und in Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. A17, 1991, Seiten 506 bis 513 beschrieben.Under a pure argon column is understood here a separation column for argon nitrogen separation by rectification. Such is commonly used in cryogenic argon recovery following cryogenic air separation. Such processes are for example off DE 2325422 A . EP 171711 A2 . EP 377117 B2 (= US 5019145 ) DE 4030749 A1 . EP 628777 B1 (= US 5426946 ) EP 669508 A1 (= US 5592833 ) EP 669509 B1 (= US 5590544 ) EP 942246 A2 . EP 1103772 A1 . DE 19609490 (= US 5669237 ) 8th . EP 1243882 A1 (= US 2002178747 A1 ) and EP 1243881 A1 (= US 2002189281 A1 ) known. The basics of cryogenic separation of air in general and of cryogenic argon recovery in particular are described, for example, in US Pat Monograph "Tiefftemperaturtechnik" by Hausen / Linde (2nd edition, 1985) , in an essay by Latimer in Chemical Engineering Progress (Vol. 63, No. 2, 1967, page 35) and in Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. A17, 1991, pages 506-513 described.

Das Reinargonprodukt kann grundsätzlich gasförmig abgezogen und zum Beispiel unmittelbar einer Nutzung zugeführt werden. In der Regel wird es flüssig aus dem Sumpf der Reinargonsäule entnommen und einem Speichertank zugeführt. In beiden Fällen ist in Fällen einer Betriebsstörung notwendig zu verhindern, dass verunreinigtes Produkt zum Verbraucher beziehungsweise in den Tank gelangt. Dies wird üblicherweise durch eine Analysenmessung im Reinargonprodukt bewerkstelligt.The Pure argon product can be gaseous deducted and, for example, fed directly to a use become. Usually it gets liquid from the swamp of the Reinargonsäule removed and fed to a storage tank. In both cases, in cases of malfunction necessary to prevent contaminated product to the consumer or enters the tank. This is usually accomplished by an analytical measurement in the pure argon product.

Eine solche fortlaufende Analysenmessung ist jedoch sehr teuer und damit für kleinere Anlagen wirtschaftlich nicht sinnvoll.A However, such continuous analysis measurement is very expensive and thus not economically useful for smaller plants.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Verfahren der eingangsgenannten Art und eine entsprechende Vorrichtung anzugeben, die einen wirtschaftlich besonders günstigen Betrieb einer Reinargonsäule ermöglichen, insbesondere auch bei relativ kleiner Anlagengröße.Of the The invention is therefore based on the object, a method of the aforementioned Specify a type and a corresponding device that is an economical particularly favorable operation of a pure argon column allow, especially for relatively small plant size.

Diese Aufgabe wird dadurch gelöst, dass der Betrieb der Reinargonsäule mit mindestens einer der Messung des Temperaturprofils der Reinargonsäule und/oder einer Messung des Differenzdrucks in der Reinargonsäule überwacht wird.These Task is solved by the operation of the pure argon column with at least one of the measurement of the temperature profile of the pure argon column and / or monitored a measurement of the differential pressure in the pure argon column becomes.

Unter einer ”Messung des Temperaturprofils” wird hier eine Temperaturmessung an mindestens einer Stelle im Inneren der Reinargonsäule verstanden. Anhand des bekannten Verhaltens des Temperaturprofils vom Sumpf zum Kopf der Reinargonsäule kann somit – auch durch eine Temperaturmessung an einer einzigen Stelle – der Betriebszustand der Reinargonsäule bestimmt werden. Alternativ kann die Temperatur an mindestens zwei Stellen innerhalb der Reinargonsäule gemessen werden, wobei diese mindestens zwei, vorzugsweise mindestens drei praktische beziehungsweise theoretische Böden auseinander liegen.Under a "measurement of the temperature profile" is here a temperature measurement at least one point inside the Reinargonsäule understood. Based on the known behavior the temperature profile from the sump to the head of the pure argon column can thus - even by a temperature measurement on a single Position - the operating state of the pure argon column be determined. Alternatively, the temperature can be at least two Positions are measured within the pure argon column, wherein these at least two, preferably at least three practical or theoretical soils are apart.

Unter einer ”Messung des Differenzdrucks” wird hier eine Druckmessung an mindestens zwei Stellen im Inneren der Reinargonsäule verstanden, wobei diese Stellen mindestens zwei praktische beziehungsweise theoretische Böden auseinander liegen. Vorzugsweise wird der Druckverlust über die gesamte Säule gemessen mittels je einer Messung am Kopf und am Sumpf.Under a "measurement of the differential pressure" is here a pressure measurement at least two points inside the pure argon column understood, these bodies at least two practical or theoretical soils are apart. Preferably the pressure loss over the entire column measured by means of one measurement at the head and at the bottom.

Im Rahmen der Erfindung hat sich herausgestellt, dass das Temperaturprofil und/oder der Differenzdruck relativ zuverlässige indirekte Methoden zur Messung der chemischen Zusammensetzung des Reinargonprodukts darstellen. Zum Beispiel unterscheiden sich die Temperaturen an Kopf und Sumpf der Reinargonsäule um etwa 1 bis 2,5 K. Das Temperaturprofil ist damit ausreichend ausgeprägt, um die Qualität des Reinargonprodukts zu überwachen.in the Within the scope of the invention, it has been found that the temperature profile and / or the differential pressure relatively reliable indirect Methods for measuring the chemical composition of the pure argon product represent. For example, the temperatures differ Head and sump of the pure argon column by about 1 to 2.5 K. The temperature profile is thus sufficiently pronounced to to monitor the quality of the pure argon product.

Vorzugsweise wird der Betrieb der Reinargonsäule mit einer Kombination der Temperatur- und Druckmessungen überwacht. Hierzu kann beispielsweise eine druckabhängige Korrektur der Temperaturmessungen vorgenommen werden.Preferably The operation of the pure argon column with a combination the temperature and pressure measurements monitored. For this purpose can For example, a pressure-dependent correction of the temperature measurements be made.

In Abhängigkeit vom aktuellen Ergebnis der Messung(en) – insbesondere bei Unterschreiten einer vorgegebenen Mindestqualität des Reinargonsprodukts – eine Warnmeldung ausgegeben wird. Das Bedienungspersonal kann dann angemessene Maßnahmen einleiten.In Dependence on the current result of the measurement (s) - in particular falls below a predetermined minimum quality of Pure argon product - a warning message is issued. The operator can then take appropriate action initiate.

Zusätzlich oder alternativ wird in einem solchen Fall eine automatische Notabschaltung der Reinargonsäule oder der Produktleitung für das Reinargonprodukt durchgeführt. Insbesondere bei mannlosem Betrieb wird zum Beispiel die Produktleitung zum Reinargontank unterbrochen und das verunreinigte Produkt der Reinargonsäule wird verworfen.additionally or alternatively, in such a case an automatic emergency shutdown the pure argon column or the product line for the pure argon product carried out. Especially with unmanned For example, the product line to the pure argon tank is interrupted and the contaminated product of the pure argon column is discarded.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 2325422 A [0002] - DE 2325422 A [0002]
  • - EP 171711 A2 [0002] - EP 171711 A2 [0002]
  • - EP 377117 B2 [0002] - EP 377117 B2 [0002]
  • - US 5019145 [0002] - US 5019145 [0002]
  • - DE 4030749 A1 [0002] - DE 4030749 A1 [0002]
  • - EP 628777 B1 [0002] - EP 628777 B1 [0002]
  • - US 5426946 [0002] US 5426946 [0002]
  • - EP 669508 A1 [0002] - EP 669508 A1 [0002]
  • - US 5592833 [0002] US 5592833 [0002]
  • - EP 669509 B1 [0002] - EP 669509 B1 [0002]
  • - US 5590544 [0002] US 5590544 [0002]
  • - EP 942246 A2 [0002] - EP 942246 A2 [0002]
  • - EP 1103772 A1 [0002] - EP 1103772 A1 [0002]
  • - DE 19609490 [0002] - DE 19609490 [0002]
  • - US 5669237 [0002] US 5669237 [0002]
  • - EP 1243882 A1 [0002] EP 1243882 A1 [0002]
  • - US 2002178747 A1 [0002] US 2002178747 A1 [0002]
  • - EP 1243881 A1 [0002] EP 1243881 A1 [0002]
  • - US 2002189281 A1 [0002] US 2002189281 A1 [0002]

Zitierte Nicht-PatentliteraturCited non-patent literature

  • - Monografie ”Tieftemperaturtechnik” von Hausen/Linde (2. Auflage, 1985) [0002] - Monograph "Tiefftemperaturtechnik" by Hausen / Linde (2nd edition, 1985) [0002]
  • - Latimer in Chemical Engineering Progress (Vol. 63, No. 2, 1967, Seite 35) [0002] - Latimer in Chemical Engineering Progress (Vol. 63, No. 2, 1967, page 35) [0002]
  • - Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. A17, 1991, Seiten 506 bis 513 [0002] Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. A17, 1991, pp. 506-513 [0002]

Claims (5)

Verfahren zum Betreiben einer Reinargonsäule, bei dem ein stickstoffhaltiger Argonstrom in einen oberen oder mittleren Bereich einer Reinargonsäule eingeleitet wird, aus dem unteren Bereich der Reinargonsäule ein Reinargonprodukt abgezogen wird, dadurch gekennzeichnet, dass der Betrieb der Reinargonsäule mit mindestens einer der beiden folgenden Messungen überwacht wird: (a) Temperaturprofil der Reinargonsäule (b) Differenzdruck in der ReinargonsäuleA method for operating a pure argon column in which a nitrogen-containing argon stream is introduced into an upper or middle region of a pure argon column, from the lower region of the pure argon column a pure argon product is withdrawn, characterized in that the operation of the pure argon column is monitored with at least one of the two following measurements : (a) Temperature profile of the pure argon column (b) Differential pressure in the pure argon column Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Betrieb der Reinargonsäule mit einer Kombination der beiden Messungen (a) und (b) überwacht wird.Method according to claim 1, characterized in that that the operation of the pure argon column with a combination the two measurements (a) and (b) is monitored. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in Abhängigkeit vom aktuellen Ergebnis der Messung(en) eine Warnmeldung ausgegeben wird.Method according to claim 1 or 2, characterized that depending on the current result of the measurement (s) a warning message is issued. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass in Abhängigkeit vom aktuellen Ergebnis der Messung(en) eine automatische Notabschaltung der Reinargonsäule oder der Produktleitung für das Reinargonprodukt durchgeführt wird.Method according to one of claims 1 to 3, characterized in that depending on the current Result of the measurement (s) an automatic emergency shutdown of the pure argon column or the product line for the pure argon product becomes. Vorrichtung zur Reinargongewinnung mit einer Reinargonsäule, Mitteln zum Einleiten eines stickstoffhaltigen Argonstroms in einen oberen oder mittleren Bereich der Reinargonsäule, mit einer Produktleitung zum Abziehen eines Reinargonprodukts aus dem unteren Bereich der Reinargonsäule abgezogen wird, gekennzeichnet durch eine Überwachungseinrichtung, die mindestens eine Messeinrichtung für eine der beiden folgenden Parameter aufweist: (a) Temperaturprofil der Reinargonsäule (b) Differenzdruck in der ReinargonsäuleReinargongewinnung device with a pure argon column, Means for introducing a nitrogen-containing argon stream into one upper or middle region of the pure argon column, with a Product line for removing a pure argon product from the lower one Area of the pure argon column is deducted, marked by a monitoring device, the at least one Measuring device for one of the following two parameters having: (a) Temperature profile of the pure argon column (B) Differential pressure in the pure argon column
DE200910016043 2009-04-02 2009-04-02 Method for operating a pure argon column, comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product Withdrawn DE102009016043A1 (en)

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DE200910016043 DE102009016043A1 (en) 2009-04-02 2009-04-02 Method for operating a pure argon column, comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product

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DE200910016043 DE102009016043A1 (en) 2009-04-02 2009-04-02 Method for operating a pure argon column, comprises initiating a nitrogen-containing argon stream into an upper- or middle area of the pure argon column from which lower area of the argon column is drawn-off to a pure argon product

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2325422A1 (en) 1973-05-18 1974-12-05 Linde Ag METHOD AND DEVICE FOR DISASSEMBLING RAW ARGON
EP0171711A2 (en) 1984-08-06 1986-02-19 Linde Aktiengesellschaft Process and apparatus for separating impure argon
US5019145A (en) 1988-12-01 1991-05-28 Linde Aktiengesellschaft Argon purification
DE4030749A1 (en) 1990-09-28 1992-04-02 Linde Ag Low temp. sepn. of argon, oxygen and nitrogen from air - using intermediate liq. oxygen fraction as cooling medium for the argon finishing column
US5426946A (en) 1993-05-28 1995-06-27 Linde Aktiengesellschaft Process and an apparatus for recovering argon
EP0669508A1 (en) 1994-02-24 1995-08-30 Linde Aktiengesellschaft Process and apparatus for obtaining pure argon
DE19609490A1 (en) 1995-03-10 1996-09-12 Linde Ag Oxygen-production process with reduced energy requirement
US5590544A (en) 1994-02-24 1997-01-07 Linde Aktiengesellschaft Process and apparatus for recovery of pure argon
EP0942246A2 (en) 1998-03-11 1999-09-15 Linde Aktiengesellschaft Process and device for air separation
EP1103772A1 (en) 1999-11-26 2001-05-30 Linde Aktiengesellschaft Device for producing argon
EP1243882A1 (en) 2001-03-21 2002-09-25 Linde Aktiengesellschaft Production of argon using a triple pressure air separation system with an argon column

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2325422A1 (en) 1973-05-18 1974-12-05 Linde Ag METHOD AND DEVICE FOR DISASSEMBLING RAW ARGON
EP0171711A2 (en) 1984-08-06 1986-02-19 Linde Aktiengesellschaft Process and apparatus for separating impure argon
US5019145A (en) 1988-12-01 1991-05-28 Linde Aktiengesellschaft Argon purification
EP0377117B2 (en) 1988-12-01 1995-05-17 Linde Aktiengesellschaft Air separation process and apparatus
DE4030749A1 (en) 1990-09-28 1992-04-02 Linde Ag Low temp. sepn. of argon, oxygen and nitrogen from air - using intermediate liq. oxygen fraction as cooling medium for the argon finishing column
US5426946A (en) 1993-05-28 1995-06-27 Linde Aktiengesellschaft Process and an apparatus for recovering argon
EP0628777B1 (en) 1993-05-28 1998-11-04 Linde Aktiengesellschaft Process and apparatus for obtaining argon
US5590544A (en) 1994-02-24 1997-01-07 Linde Aktiengesellschaft Process and apparatus for recovery of pure argon
US5592833A (en) 1994-02-24 1997-01-14 Linde Aktiengesellschaft Process and apparatus for the recovery of pure argon
EP0669508A1 (en) 1994-02-24 1995-08-30 Linde Aktiengesellschaft Process and apparatus for obtaining pure argon
EP0669509B1 (en) 1994-02-24 2000-06-28 Linde Aktiengesellschaft Process and apparatus for obtaining pure argon
DE19609490A1 (en) 1995-03-10 1996-09-12 Linde Ag Oxygen-production process with reduced energy requirement
US5669237A (en) 1995-03-10 1997-09-23 Linde Aktiengesellschaft Method and apparatus for the low-temperature fractionation of air
EP0942246A2 (en) 1998-03-11 1999-09-15 Linde Aktiengesellschaft Process and device for air separation
EP1103772A1 (en) 1999-11-26 2001-05-30 Linde Aktiengesellschaft Device for producing argon
EP1243882A1 (en) 2001-03-21 2002-09-25 Linde Aktiengesellschaft Production of argon using a triple pressure air separation system with an argon column
EP1243881A1 (en) 2001-03-21 2002-09-25 Linde Aktiengesellschaft Cryogenic triple column air separation system
US20020178747A1 (en) 2001-03-21 2002-12-05 Linde Aktiengesellschaft Obtaining argon using a three-column system for the fractionation of air and a crude argon column
US20020189281A1 (en) 2001-03-21 2002-12-19 Linde Aktiengesellschaft Three-column system for the low-temperature fractionation of air

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Latimer in Chemical Engineering Progress (Vol. 63, No. 2, 1967, Seite 35)
Monografie "Tieftemperaturtechnik" von Hausen/Linde (2. Auflage, 1985)
Ullmann's Encyclopedia of Industrial Chemistry, 5th Ed., Vol. A17, 1991, Seiten 506 bis 513

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