EP0342436A2 - Procédé de séparation de l'air à basse température - Google Patents
Procédé de séparation de l'air à basse température Download PDFInfo
- Publication number
- EP0342436A2 EP0342436A2 EP89108038A EP89108038A EP0342436A2 EP 0342436 A2 EP0342436 A2 EP 0342436A2 EP 89108038 A EP89108038 A EP 89108038A EP 89108038 A EP89108038 A EP 89108038A EP 0342436 A2 EP0342436 A2 EP 0342436A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- feed air
- low
- stream
- stage
- pressure stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
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
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
-
- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
-
- 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
- F25J3/04406—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 using a dual pressure main column system
- F25J3/04412—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 using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- 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
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
- F25J2205/62—Purifying more than one feed stream in multiple adsorption vessels, e.g. for two feed streams at different pressures
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
-
- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
-
- 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
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/12—Particular process parameters like pressure, temperature, ratios
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/939—Partial feed stream expansion, air
Definitions
- the invention relates to a method for the low-temperature separation of air, in which a first stream of feed air is compressed, pre-cleaned, cooled and at least partially introduced into the pressure stage of a two-stage rectification device and in which gaseous oxygen and gaseous nitrogen are taken from the low-pressure stage.
- feed air is usually blown into the pressure stage, where it is pre-divided into a nitrogen-rich and an oxygen-rich fraction, which are then further rectified in the low-pressure stage.
- the feed air must be compressed to the pressure level of the pressure stage, i.e. to about 5 to 7 bar.
- Air compressors required for this purpose tie up capital on the one hand due to their high acquisition costs, and on the other hand they are the largest energy consumer during the operation of the system.
- a plant which mainly serves to produce oxygen of a relatively low purity, for example less than 98%, can also be operated in such a way that part of the feed air is blown directly into the low-pressure stage without pre-separation in the pressure stage, without the oxygen yield being lost is significantly reduced.
- a method in which this fact is used to recover energy from compressed air compressed to the pressure column level is known from DE-PS-28 54 580.
- part of the feed air is expanded to the pressure level of the low-pressure stage after compression and then fed to the low-pressure stage. The cold obtained during relaxation is used to liquefy product gases.
- the known method has economic disadvantages, since the recovery of the compression energy can only be incomplete even when using a combination of an expansion turbine and a mechanically coupled compressor.
- the known method lacks flexibility, since expansion turbines are only operated in a narrowly limited range of throughput quantities with favorable efficiency. The amount of air blown directly into the low pressure stage can therefore only be changed to a limited extent during operation.
- the invention has for its object to develop a method of the type mentioned that works economically particularly cheap.
- This object is achieved in that a second feed air stream is compressed to a lower pressure than the first feed air stream, and the second feed air stream is then pre-cleaned, cooled and the Low pressure stage of the rectifier is supplied.
- At least a portion of the air that is blown directly into the low-pressure stage is only compressed to the necessary pressure of 1.3 to 2.5 bar, preferably 1.5 to 1.8 bar.
- Another advantage of the method according to the invention is that the amount of air introduced directly into the low pressure column can be adjusted over very wide ranges. Depending on the desired purity of the product oxygen, the amount of air that can be introduced directly into the low pressure column varies without significantly influencing the oxygen yield. For example, in the method of the invention, the throughput in the second feed air stream can be increased using simple control devices if the requirements for the purity of the product oxygen are lower.
- the entire feed air is compressed together in a first stage and then divided into the two feed air streams, and the first feed air stream is then further compressed in a second stage.
- the two stages of compression can each be constructed from several individual compressor units.
- a partial stream is branched off from the first feed air stream after the pre-cleaning, this is subsequently compressed, cooled and relaxed in a work-performing manner.
- cold can be generated which, in addition to compensating for general cold losses such as insulation and exchange losses, is also required, for example, for the liquefaction of product gases.
- the work obtained when the partial stream of the first feed air stream is released is advantageously used to recompress the partial stream.
- the partial stream of the first feed stream is introduced into the low-pressure stage of the rectification device after the expansion. Because the partial flow is expanded to the much lower pressure of the low-pressure stage, a particularly high enthalpy difference is available, which is used for cooling.
- Atmospheric air is drawn in from a first compressor stage 2 via a line 1 and distributed at a first branch point 3 to a first feed air stream (line 4) and a second feed air stream (line 7).
- the pressure at branch point 3 is 1.3 to 2.5 bar, preferably 1.5 to 1.8 bar.
- the first feed air stream is further compressed in a second compressor stage 5 and pre-cleaned in a molecular sieve apparatus 6, only shown schematically, by removing water vapor, carbon dioxide and dangerous hydrocarbons.
- the pressure in the first feed air stream behind the molecular sieve apparatus 6 is 5.0 to 7.0 bar, preferably 5.2 to 6.0 bar.
- the greater part of the first feed air stream is passed via line 8 through a heat exchanger 9, cooled there in countercurrent to decomposition products and then blown into the pressure stage 11 of a two-stage rectification column 10.
- a partial flow 12 is branched off from the first feed air flow, further compressed in a post-compressor 13, cooled in the heat exchanger 9 and then expanded in the expansion turbine 14 to generate cold.
- the work obtained when releasing the partial flow is mechanically transferred to the post-compressor 13.
- the relaxed partial stream is introduced via line 15 into the low-pressure stage 12 of the rectification column 10.
- the low-pressure stage 12 is operated at a pressure of 1.1 to 2.0 bar, preferably 1.3 to 1.7 bar, and is in heat-exchanging connection with the pressure stage 11 via a condenser-evaporator.
- the nitrogen-rich liquid 16 and the oxygen-rich liquid 17 are taken from the pressure stage 11; these two flows are in heat exchangers 18 and 19 in countercurrent to gaseous nitrogen 21 from the low pressure stage 12 cooled and then throttled at a suitable point in the low pressure stage 12.
- Gaseous oxygen is led out of the low-pressure stage 12 as the main product via line 24, and smaller quantities of liquid oxygen 23 and liquid nitrogen 25 are also removed.
- the gaseous product streams 21, 22, 24 are heated in the heat exchanger 9 to almost ambient temperature.
- the gaseous nitrogen 21 from the low-pressure stage is used in part to regenerate the molecular sieve apparatuses 6, 8. In addition, a small gaseous pressure nitrogen stream can be removed via line 22.
- the second feed air stream (line 7) is pre-cleaned in its own molecular sieve apparatus 8, cooled in the heat exchanger 9 and then, after being combined with the relaxed partial stream of the first feed air stream, fed via line 15 into the low pressure stage 12 of the rectification column 10.
- the method according to the invention with direct feed of feed air into the low pressure stage proves to be economically advantageous if a purity of 85 to 98% is to be achieved in the product oxygen (lines 23 and 24 in the exemplary embodiment). If, for example, an oxygen purity of 96% is desired, up to 35% of the feed air can be fed directly into the low-pressure stage without significantly reducing the oxygen yield.
- the second compression stage 5 can therefore be designed to be smaller in accordance with the reduced air throughput in the first feed air flow, and correspondingly less energy has to be used for the compression during operation.
- the required cold can also be supplied in a different way instead of the generation of cold by relaxing the partial flow 12 of the first feed air flow.
- the entire first feed air flow is fed into the pressure stage and, for example, part of the first feed air flow is cooled by heat exchange with an external refrigerant.
- that part of the feed air which is relieved of work during the movement of the figure only has to be compressed to the level of the low-pressure stage; the compressor, which corresponds to the second compressor stage 5 in the figure, can thus be made even smaller.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3817244 | 1988-05-20 | ||
DE3817244A DE3817244A1 (de) | 1988-05-20 | 1988-05-20 | Verfahren zur tieftemperaturzerlegung von luft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0342436A2 true EP0342436A2 (fr) | 1989-11-23 |
EP0342436A3 EP0342436A3 (fr) | 1990-01-24 |
Family
ID=6354798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89108038A Ceased EP0342436A3 (fr) | 1988-05-20 | 1989-05-03 | Procédé de séparation de l'air à basse température |
Country Status (6)
Country | Link |
---|---|
US (1) | US4964901A (fr) |
EP (1) | EP0342436A3 (fr) |
JP (1) | JPH0264385A (fr) |
CN (1) | CN1037961A (fr) |
DE (1) | DE3817244A1 (fr) |
ZA (1) | ZA893768B (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU653120B2 (en) * | 1991-03-26 | 1994-09-15 | Linde Aktiengesellschaft | Process for low-temperature air fractionation |
EP2489968A1 (fr) * | 2011-02-17 | 2012-08-22 | Linde Aktiengesellschaft | Procédé et dispositif destinés à la décomposition à basse température d'air |
DE102011113671A1 (de) | 2011-09-20 | 2013-03-21 | Linde Ag | Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft |
DE102011113666A1 (de) | 2011-09-20 | 2013-03-21 | Linde Ag | Verfahren und Vorrichtung zur Erzeugung zweier gereinigter Luftteilströme |
WO2013041229A1 (fr) | 2011-09-20 | 2013-03-28 | Linde Aktiengesellschaft | Procédé et dispositif de séparation cryogénique de l'air |
WO2013053425A2 (fr) | 2011-09-20 | 2013-04-18 | Linde Aktiengesellschaft | Procédé et dispositif de production de deux courants d'air partiels purifiés |
DE202014002220U1 (de) | 2013-10-31 | 2014-04-14 | Linde Aktiengesellschaft | Vorrichtung zur Tieftemperaturzerlegung von Luft |
FR3119884A1 (fr) * | 2021-02-18 | 2022-08-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé de séparation d’air par distillation cryogénique |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5197296A (en) * | 1992-01-21 | 1993-03-30 | Praxair Technology, Inc. | Cryogenic rectification system for producing elevated pressure product |
US5837790A (en) | 1994-10-24 | 1998-11-17 | Amcol International Corporation | Precipitation polymerization process for producing an oil adsorbent polymer capable of entrapping solid particles and liquids and the product thereof |
US5571309A (en) * | 1995-07-28 | 1996-11-05 | The Boc Group, Inc. | Adsorption process |
DE19537910A1 (de) * | 1995-10-11 | 1997-04-17 | Linde Ag | Doppelsäulenverfahren und -vorrichtung zur Tieftemperaturzerlegung von Luft |
DE19537913A1 (de) * | 1995-10-11 | 1997-04-17 | Linde Ag | Dreifachsäulenverfahren zur Tieftemperaturzerlegung von Luft |
DE19543395A1 (de) * | 1995-11-21 | 1997-05-22 | Linde Ag | Doppelsäulenverfahren und -vorrichtung zur Tieftemperaturzerlegung von Luft |
US5907959A (en) * | 1998-01-22 | 1999-06-01 | Air Products And Chemicals, Inc. | Air separation process using warm and cold expanders |
DE19908451A1 (de) * | 1999-02-26 | 2000-08-31 | Linde Tech Gase Gmbh | Zweisäulensystem zur Tieftemperaturzerlegung von Luft |
US7149074B2 (en) * | 2001-04-19 | 2006-12-12 | Cabot Corporation | Methods of making a niobium metal oxide |
US6536234B1 (en) | 2002-02-05 | 2003-03-25 | Praxair Technology, Inc. | Three column cryogenic air separation system with dual pressure air feeds |
US7632337B2 (en) * | 2006-06-30 | 2009-12-15 | Praxair Technology, Inc. | Air prepurification for cryogenic air separation |
FR3090831B1 (fr) | 2018-12-21 | 2022-06-03 | L´Air Liquide Sa Pour L’Etude Et L’Exploitation Des Procedes Georges Claude | Appareil et procédé de séparation d’air par distillation cryogénique |
FR3110685B1 (fr) | 2020-05-20 | 2022-12-23 | Air Liquide | Procédé et appareil de séparation d’air par distillation cryogénique |
US20230400197A1 (en) * | 2020-10-27 | 2023-12-14 | Fabrum Ip Holdings Limited | Air treatment system and method of treating air |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3528374A1 (de) * | 1985-08-07 | 1987-02-12 | Linde Ag | Verfahren und vorrichtung zur erzeugung von stickstoff mit ueberatmosphaerischem druck |
US4704147A (en) * | 1986-08-20 | 1987-11-03 | Air Products And Chemicals, Inc. | Dual air pressure cycle to produce low purity oxygen |
DE3643359A1 (de) * | 1986-12-18 | 1988-06-23 | Linde Ag | Verfahren und vorrichtung zur luftzerlegung durch zweistufige rektifikation |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2666303A (en) * | 1950-06-08 | 1954-01-19 | British Oxygen Co Ltd | Apparatus for the separation of gas mixtures by liquefaction and rectification |
US2873583A (en) * | 1954-05-04 | 1959-02-17 | Union Carbide Corp | Dual pressure cycle for air separation |
US2846853A (en) * | 1954-06-01 | 1958-08-12 | Union Carbide Corp | High pressure scrubber liquefier in air separation systems |
NL207488A (fr) * | 1955-05-31 | |||
DE1117616B (de) * | 1960-10-14 | 1961-11-23 | Linde Eismasch Ag | Verfahren und Einrichtung zum Gewinnen besonders reiner Zerlegungsprodukte in Tieftemperaturgaszerlegungsanlagen |
US3699695A (en) * | 1965-10-29 | 1972-10-24 | Linde Ag | Process of separating air into an oxygen-rich fraction suitable for blast furnace operation |
DE1501723A1 (de) * | 1966-01-13 | 1969-06-26 | Linde Ag | Verfahren und Vorrichtung zur Erzeugung gasfoermigen Hochdrucksauerstoffs bei der Tieftemperaturrektifikation von Luft |
US3760596A (en) * | 1968-10-23 | 1973-09-25 | M Lemberg | Method of liberation of pure nitrogen and oxygen from air |
JPH0721378B2 (ja) * | 1985-08-12 | 1995-03-08 | 大同ほくさん株式会社 | 酸素ガス製造装置 |
-
1988
- 1988-05-20 DE DE3817244A patent/DE3817244A1/de not_active Withdrawn
-
1989
- 1989-05-03 EP EP89108038A patent/EP0342436A3/fr not_active Ceased
- 1989-05-18 CN CN89103291A patent/CN1037961A/zh not_active Withdrawn
- 1989-05-18 JP JP1123003A patent/JPH0264385A/ja active Pending
- 1989-05-19 US US07/354,257 patent/US4964901A/en not_active Expired - Fee Related
- 1989-05-19 ZA ZA893768A patent/ZA893768B/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3528374A1 (de) * | 1985-08-07 | 1987-02-12 | Linde Ag | Verfahren und vorrichtung zur erzeugung von stickstoff mit ueberatmosphaerischem druck |
US4704147A (en) * | 1986-08-20 | 1987-11-03 | Air Products And Chemicals, Inc. | Dual air pressure cycle to produce low purity oxygen |
DE3643359A1 (de) * | 1986-12-18 | 1988-06-23 | Linde Ag | Verfahren und vorrichtung zur luftzerlegung durch zweistufige rektifikation |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU653120B2 (en) * | 1991-03-26 | 1994-09-15 | Linde Aktiengesellschaft | Process for low-temperature air fractionation |
EP2489968A1 (fr) * | 2011-02-17 | 2012-08-22 | Linde Aktiengesellschaft | Procédé et dispositif destinés à la décomposition à basse température d'air |
DE102011113671A1 (de) | 2011-09-20 | 2013-03-21 | Linde Ag | Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft |
DE102011113666A1 (de) | 2011-09-20 | 2013-03-21 | Linde Ag | Verfahren und Vorrichtung zur Erzeugung zweier gereinigter Luftteilströme |
WO2013041229A1 (fr) | 2011-09-20 | 2013-03-28 | Linde Aktiengesellschaft | Procédé et dispositif de séparation cryogénique de l'air |
WO2013053425A2 (fr) | 2011-09-20 | 2013-04-18 | Linde Aktiengesellschaft | Procédé et dispositif de production de deux courants d'air partiels purifiés |
US10222120B2 (en) | 2011-09-20 | 2019-03-05 | Linde Aktiengesellschaft | Method and device for generating two purified partial air streams |
DE202014002220U1 (de) | 2013-10-31 | 2014-04-14 | Linde Aktiengesellschaft | Vorrichtung zur Tieftemperaturzerlegung von Luft |
FR3119884A1 (fr) * | 2021-02-18 | 2022-08-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé de séparation d’air par distillation cryogénique |
WO2022175194A1 (fr) * | 2021-02-18 | 2022-08-25 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé de séparation d'air par distillation cryogénique |
Also Published As
Publication number | Publication date |
---|---|
EP0342436A3 (fr) | 1990-01-24 |
US4964901A (en) | 1990-10-23 |
DE3817244A1 (de) | 1989-11-23 |
JPH0264385A (ja) | 1990-03-05 |
ZA893768B (en) | 1990-02-28 |
CN1037961A (zh) | 1989-12-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0342436A2 (fr) | Procédé de séparation de l'air à basse température | |
EP0505812B1 (fr) | Procédé de séparation d'air à basse température | |
EP0377117B2 (fr) | Procédé et dispositif de séparation de l'air | |
EP0384483B1 (fr) | Procédé et dispositif de rectification d'air | |
EP0316768B1 (fr) | Procédé de séparation d'air par rectification à basse température | |
EP0384213B1 (fr) | Procédé et dispositif de rectification d'air | |
EP1067345B1 (fr) | Procédé et dispositif pour la séparation cryogénique des constituants de l'air | |
DE2557453A1 (de) | Verfahren zur zerlegung von luft | |
EP1666822A1 (fr) | Installation pour la séparation cryogénique d'un mélange gazeux en particulier d'air | |
DE69209572T2 (de) | Verfahren zur Herstellung von reinstem Stickstoff | |
EP0527501A1 (fr) | Procédé et dispositif de rectification d'air | |
WO2010017968A2 (fr) | Procédé et dispositif de séparation de l'air à basse température | |
DE69308456T3 (de) | Extrem reiner stickstoff- und sauerstoffgenerator und verfahren | |
DE69614950T2 (de) | Verfahren und vorrichtung zur erzeugung von hochreinem stickstoff | |
EP1146301A1 (fr) | Procédé et dispositif de production d'azote à haute pression par séparation d'air | |
DE3528374A1 (de) | Verfahren und vorrichtung zur erzeugung von stickstoff mit ueberatmosphaerischem druck | |
DE19951521A1 (de) | Verfahren und Vorrichtung zur Gewinnung eines Druckprodukts durch Tieftemperaturzerlegung von Luft | |
DE2854508A1 (de) | Verfahren zur tieftemperaturzerlegung eines gasgemisches | |
DE69520134T2 (de) | Verfahren und Vorrichtung zum Verdichten eines zu destillierenden Gasgemisches und zum Entspannen wenigstens eines Gasstromes | |
EP0768503A2 (fr) | Procédé de séparation d'air à triple colonne | |
DE2903089A1 (de) | Verfahren zur gewinnung von sauerstoff aus luft | |
DE69004647T2 (de) | Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft. | |
DE19933558C5 (de) | Dreisäulenverfahren und -vorrichtung zur Tieftemperaturzerlegung von Luft | |
DE3814187C2 (de) | Verfahren zur Luftzerlegung durch Tieftemperaturrektifikation | |
EP1189001B1 (fr) | Procédé et dispositif de production d'azote de haute pureté par la séparation cryogénique d'air |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE DE FR GB GR IT NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE DE FR GB GR IT NL SE |
|
17P | Request for examination filed |
Effective date: 19891214 |
|
17Q | First examination report despatched |
Effective date: 19910114 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19911108 |