DK628589A - Fremgangsmaade til reduktion af nitrogenoxider i afgangsgasser - Google Patents

Fremgangsmaade til reduktion af nitrogenoxider i afgangsgasser Download PDF

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Publication number
DK628589A
DK628589A DK628589A DK628589A DK628589A DK 628589 A DK628589 A DK 628589A DK 628589 A DK628589 A DK 628589A DK 628589 A DK628589 A DK 628589A DK 628589 A DK628589 A DK 628589A
Authority
DK
Denmark
Prior art keywords
nitrogen oxides
zeolite catalyst
procedure
exhaust gas
reducing nitrogen
Prior art date
Application number
DK628589A
Other languages
Danish (da)
English (en)
Other versions
DK628589D0 (da
Inventor
Michael Baacke
Reinhold Brand
Bernd Engler
Akos Kiss
Peter Kleine-Moellhoff
Peter Kleinschmit
Edgar Koberstein
Mustafa Siray
Original Assignee
Degussa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Degussa filed Critical Degussa
Publication of DK628589D0 publication Critical patent/DK628589D0/da
Publication of DK628589A publication Critical patent/DK628589A/da

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/26—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
    • B01J29/24—Iron group metals or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2065—Cerium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20738—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20769—Molybdenum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biomedical Technology (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)
DK628589A 1988-12-14 1989-12-13 Fremgangsmaade til reduktion af nitrogenoxider i afgangsgasser DK628589A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3841990A DE3841990A1 (de) 1988-12-14 1988-12-14 Verfahren zur reduktion von stickoxiden aus abgasen

Publications (2)

Publication Number Publication Date
DK628589D0 DK628589D0 (da) 1989-12-13
DK628589A true DK628589A (da) 1990-06-15

Family

ID=6369088

Family Applications (1)

Application Number Title Priority Date Filing Date
DK628589A DK628589A (da) 1988-12-14 1989-12-13 Fremgangsmaade til reduktion af nitrogenoxider i afgangsgasser

Country Status (12)

Country Link
US (1) US5116586A (ja)
EP (1) EP0376025B1 (ja)
JP (1) JPH07100132B2 (ja)
KR (1) KR930000642B1 (ja)
AT (1) ATE112697T1 (ja)
AU (1) AU620479B2 (ja)
BR (1) BR8906426A (ja)
CA (1) CA2005412A1 (ja)
DD (1) DD290816A5 (ja)
DE (2) DE3841990A1 (ja)
DK (1) DK628589A (ja)
RU (1) RU1829954C (ja)

Families Citing this family (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120695A (en) * 1989-07-28 1992-06-09 Degusaa Aktiengesellschaft (Degussa Ag) Catalyst for purifying exhaust gases from internal combustion engines and gas turbines operated at above the stoichiometric ratio
CA2024154C (en) * 1989-08-31 1995-02-14 Senshi Kasahara Catalyst for reducing nitrogen oxides from exhaust gas
EP0435412B1 (en) * 1989-12-28 1996-03-20 Mitsubishi Jukogyo Kabushiki Kaisha Denitration catalyst for high-temperature exhaust gas
DE4003515A1 (de) * 1990-02-06 1991-08-08 Bayer Ag Verfahren zur reduktion von in abgasen enthaltenen stickoxiden
EP0470728A1 (en) * 1990-08-07 1992-02-12 Takuma Co., Ltd. Methods for lowering the nitrogen oxides content of exhaust gases
DE4206310A1 (de) * 1992-02-28 1993-09-02 Sperling Friedrich Dr Ing Abgaskatalysator fuer brennkraftmaschinen
DE4206699C2 (de) * 1992-03-04 1996-02-01 Degussa NO¶x¶-Verminderung im mageren Abgas von Kraftfahrzeugmotoren
US5415850A (en) * 1993-02-24 1995-05-16 The Research Foundation Of State Univeristy Of New York Pillared interlayered clay catalysts for the selective reduction of nitrogen oxides with ammonia
US5413699A (en) * 1993-10-14 1995-05-09 Mobil Oil Corporation FCC process with fines tolerant SCR reactor
NL9302288A (nl) * 1993-12-31 1995-07-17 Univ Delft Tech Werkwijze voor het behandelen van stikstofoxiden-bevattend gas onder toepassing van een ceriumzeoliet.
EP0667181B1 (en) * 1994-02-15 2000-11-02 Tokyo Gas Co., Ltd. Method and catalyst for the purification of NOx-containing exhaust gases
DE4413359A1 (de) * 1994-04-18 1995-10-19 Ftu Gmbh Forschung Und Tech En Mittel und Verfahren zur Reinigung von Gasen und Abgasen von NOx
US5589147A (en) * 1994-07-07 1996-12-31 Mobil Oil Corporation Catalytic system for the reducton of nitrogen oxides
RU2108140C1 (ru) * 1996-06-24 1998-04-10 Александр Юрьевич Логинов Способ очистки отработавших газов
WO1998037967A1 (de) * 1997-02-27 1998-09-03 Basf Aktiengesellschaft Verfahren zur herstellung von schalenkatalysatoren für die katalytische gasphasenoxidation von aromatischen kohlenwasserstoffen
DE19721440A1 (de) * 1997-05-21 1998-11-26 Degussa Verfahren zur Reinigung eines mageren Abgases und Katalysatorsystem hierfür
DE19728699A1 (de) * 1997-07-04 1999-02-11 Metallgesellschaft Ag Verfahren zur katalytischen Reduktion von Stickoxiden
DE19728701A1 (de) * 1997-07-04 1999-01-07 Metallgesellschaft Ag Verfahren zur Herstellung feinkörniger Katalysatoren aus natürlich vorkommendem Zeolith
US6171372B1 (en) * 1997-10-13 2001-01-09 Hitachi Zosen Corporation Nitrogen dioxide absorbent
GB9802504D0 (en) 1998-02-06 1998-04-01 Johnson Matthey Plc Improvements in emission control
US8833062B1 (en) 2013-03-15 2014-09-16 Daimier Ag Catalytic reduction of NOx
DE19903533A1 (de) 1999-01-29 2000-08-10 Degussa Verfahren zur selektiven katalytischen Reduktion von Stickoxiden in sauerstoffhaltigen Abgasen
WO2000072965A1 (en) * 1999-05-27 2000-12-07 The Regents Of The University Of Michigan Zeolite catalysts for selective catalytic reduction of nitric oxide by ammonia and method of making
KR100356367B1 (ko) * 1999-09-07 2002-10-19 코오롱건설주식회사 산성 기체에 내구성이 강한 질소산화물 제거용 촉매
DE10020100A1 (de) * 2000-04-22 2001-10-31 Dmc2 Degussa Metals Catalysts Verfahren und Katalysator zur Reduktion von Stickoxiden
US6592985B2 (en) * 2000-09-20 2003-07-15 Camco International (Uk) Limited Polycrystalline diamond partially depleted of catalyzing material
US6689709B1 (en) * 2000-11-15 2004-02-10 Engelhard Corporation Hydrothermally stable metal promoted zeolite beta for NOx reduction
US6670296B2 (en) * 2001-01-11 2003-12-30 Delphi Technologies, Inc. Alumina/zeolite lean NOx catalyst
DE10103771A1 (de) 2001-01-27 2002-08-14 Omg Ag & Co Kg Verfahren zur Wiederherstellung der katalytischen Aktivität eines Katalysators, welcher im Abgastrakt eines Dieselmotors angeordnet ist und wenigstens eine Oxidationsfunktion aufweist
US6624113B2 (en) 2001-03-13 2003-09-23 Delphi Technologies, Inc. Alkali metal/alkaline earth lean NOx catalyst
EP1264628A1 (de) * 2001-06-09 2002-12-11 OMG AG & Co. KG Redox-Katalysator für die selektive katalytische Reduktion der im Abgas von Dieselmotoren enthaltenen Stickoxide mittels Ammoniak sowie Verfahren zu seiner Herstellung
US6914026B2 (en) * 2001-09-07 2005-07-05 Engelhard Corporation Hydrothermally stable metal promoted zeolite beta for NOx reduction
US20030073566A1 (en) * 2001-10-11 2003-04-17 Marshall Christopher L. Novel catalyst for selective NOx reduction using hydrocarbons
EP1340541A1 (en) * 2002-02-28 2003-09-03 Corning Incorporated Structured catalysts incorporating thick washcoats and method of preparation thereof
GB0214968D0 (en) * 2002-06-28 2002-08-07 Johnson Matthey Plc Zeolite-based NH SCR catalyst
AU2003225709A1 (en) * 2002-09-04 2004-03-29 The University Of Chicago Novel catalyst for selective nox reduction using hydrocarbons
US6936561B2 (en) * 2002-12-02 2005-08-30 Corning Incorporated Monolithic zeolite coated structures and a method of manufacture
US7049261B2 (en) * 2003-02-27 2006-05-23 General Motors Corporation Zeolite catalyst and preparation process for NOx reduction
WO2006011575A1 (ja) * 2004-07-29 2006-02-02 N.E. Chemcat Corporation 低温特性に優れる脱硝触媒
JP2006305423A (ja) * 2005-04-26 2006-11-09 Toyota Central Res & Dev Lab Inc ＮＯｘ選択還元触媒
JP4766238B2 (ja) * 2005-09-08 2011-09-07 三菱自動車工業株式会社 Ｈｃ吸着材の劣化判定装置
DE102005044494B3 (de) * 2005-09-16 2007-03-08 Wenzel, Lothar Vorrichtung zur Beseitigung von schädlichen Bestandteilen aus Abgasen von Brennkraftmaschinen
JP4617253B2 (ja) * 2005-12-26 2011-01-19 エヌ・イーケムキャット株式会社 脱硝触媒、ハニカム構造型脱硝触媒、及びそれを用いた脱硝方法
JP4803487B2 (ja) * 2006-02-22 2011-10-26 株式会社豊田中央研究所 窒素酸化物選択還元触媒及びその製造方法
DE102006020158B4 (de) 2006-05-02 2009-04-09 Argillon Gmbh Extrudierter Vollkatalysator sowie Verfahren zu seiner Herstellung
KR100859747B1 (ko) * 2007-02-05 2008-09-24 고등기술연구원연구조합 질소 및 질소산화물 가스를 감소시키기 위한 방법 및 장치
DE102007027676A1 (de) * 2007-06-15 2008-12-18 Süd-Chemie AG Zeolithischer Katalysator zur Entstickung von Abgasen
DE102007030895A1 (de) * 2007-07-03 2009-01-08 Süd-Chemie AG Abgaskatalysator für Salzsäure-haltige Abgase
KR101447945B1 (ko) * 2008-01-21 2014-10-08 에스케이이노베이션 주식회사 제올라이트를 이용한 질소산화물 저감용 하니컴형 촉매의제조방법
WO2009118869A1 (ja) * 2008-03-27 2009-10-01 イビデン株式会社 ハニカム構造体および排ガス処理装置
WO2009118870A1 (ja) * 2008-03-27 2009-10-01 イビデン株式会社 ハニカム構造体
JPWO2009118868A1 (ja) * 2008-03-27 2011-07-21 イビデン株式会社 ハニカム構造体
WO2009139088A1 (ja) * 2008-05-15 2009-11-19 三井金属鉱業株式会社 窒素酸化物浄化用触媒
US8220274B2 (en) * 2008-05-15 2012-07-17 Johnson Matthey Inc. Emission reduction method for use with a heat recovery steam generation system
WO2009141873A1 (ja) * 2008-05-20 2009-11-26 イビデン株式会社 ハニカム構造体
JP5356063B2 (ja) * 2008-05-20 2013-12-04 イビデン株式会社 ハニカム構造体
KR101117467B1 (ko) * 2008-05-20 2012-03-07 이비덴 가부시키가이샤 허니컴 구조체
KR20100009532A (ko) * 2008-05-20 2010-01-27 이비덴 가부시키가이샤 허니컴 구조체
WO2009141874A1 (ja) * 2008-05-20 2009-11-26 イビデン株式会社 ハニカム構造体
JP5815220B2 (ja) * 2009-11-19 2015-11-17 イビデン株式会社 ハニカム構造体及び排ガス浄化装置
WO2011061841A1 (ja) * 2009-11-19 2011-05-26 イビデン株式会社 ハニカム構造体及び排ガス浄化装置
WO2012063341A1 (ja) * 2010-11-10 2012-05-18 イビデン株式会社 ハニカム構造体の製造方法、およびハニカム成形体の脱脂処理装置
EP2463028A1 (en) 2010-12-11 2012-06-13 Umicore Ag & Co. Kg Process for the production of metal doped zeolites and zeotypes and application of same to the catalytic removal of nitrogen oxides
DE112013000477T5 (de) 2012-08-17 2014-10-30 Johnson Matthey Public Limited Company Zeolithpromotierte V/TiW-Katalysatoren
CN103127951B (zh) * 2013-03-05 2015-02-04 四川中自尾气净化有限公司 一种用于柴油车尾气脱硝的低温scr 催化剂及其制备方法
US8850802B1 (en) 2013-03-15 2014-10-07 Daimler Ag Catalytic reduction of NOx
JP5919215B2 (ja) 2013-03-29 2016-05-18 日本碍子株式会社 ハニカム触媒体
JP6041007B2 (ja) * 2014-02-21 2016-12-07 トヨタ自動車株式会社 選択還元型ＮＯｘ触媒
JP6292159B2 (ja) * 2015-04-13 2018-03-14 トヨタ自動車株式会社 排ガス浄化用触媒
CN108883403A (zh) 2016-02-03 2018-11-23 巴斯夫公司 铜和铁共交换的菱沸石催化剂
GB201608643D0 (en) * 2016-05-17 2016-06-29 Thermo Fisher Scient Bremen Elemental analysis system and method

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49122475A (ja) * 1973-03-13 1974-11-22
FR2243732B1 (ja) * 1973-09-13 1979-03-09 Kaihatsu Kenkyusho Ind Res
US4085193A (en) * 1973-12-12 1978-04-18 Mitsubishi Petrochemical Co. Ltd. Catalytic process for reducing nitrogen oxides to nitrogen
JPS5111063A (ja) * 1974-07-18 1976-01-28 Toray Industries
JPS5125472A (en) * 1974-08-29 1976-03-02 Toray Industries Chitsusosankabutsu no jokyohoho
JPS5169476A (ja) * 1974-12-13 1976-06-16 Toray Industries
JPS5850777B2 (ja) * 1975-03-28 1983-11-12 トウアネンリヨウコウギヨウ カブシキガイシヤ チツソサンカブツノカンゲンヨウシヨクバイ
JPS51147470A (en) * 1975-06-12 1976-12-17 Toa Nenryo Kogyo Kk A process for catalytic reduction of nitrogen oxides
US4018706A (en) * 1975-07-21 1977-04-19 Nippon Shokubai Kagaku Kogyo Co., Ltd. Catalysts for purifying exhaust and waste gases
JPS5450495A (en) * 1977-09-30 1979-04-20 Ube Ind Ltd Nitrogen oxides purification catalyst
DE3328653A1 (de) * 1983-08-09 1985-02-28 Steuler Industriewerke GmbH, 5410 Höhr-Grenzhausen Vorrichtung zur durchfuehrung eines verfahrens zur ausscheidung von stickoxyden aus abgasen
JPS60106535A (ja) * 1983-11-16 1985-06-12 Mitsubishi Heavy Ind Ltd 廃ガス処理用触媒
US4571329A (en) * 1984-08-13 1986-02-18 Babcock-Hitachi Kabushiki Kaisha Ammonia reduction-denitration process and apparatus therefor
US4732879A (en) * 1985-11-08 1988-03-22 Owens-Corning Fiberglas Corporation Method for applying porous, metal oxide coatings to relatively nonporous fibrous substrates
DE3642018A1 (de) * 1985-12-21 1987-06-25 Volkswagen Ag Verfahren und vorrichtung zur reduktion von stickoxiden
DE3631950A1 (de) * 1986-09-19 1988-03-31 Siemens Ag Katalysator zur verminderung von stickoxiden in rauchgasen
DE3633493A1 (de) * 1986-10-02 1988-04-14 Metallgesellschaft Ag Verfahren zur katalytischen reduktion von no
DE3635284A1 (de) * 1986-10-16 1988-04-28 Steuler Industriewerke Gmbh Katalysator zur entfernung von stickoxiden aus abgasen
DE3802871A1 (de) * 1987-01-31 1988-08-11 Ibs Engineering & Consulting I Anwendung eines katalysators auf der basis von modifiziertem zeolith, beladen mit einem oder mehreren metallen aus der gruppe von fe, cu, ni und co, im scr-verfahren
FR2622474B2 (fr) * 1987-04-03 1990-01-26 Azote & Prod Chim Composition catalytique de reduction selective des oxydes d'azote contenus dans des effluents gazeux oxygenes et procede d'epuration desdits effluents
DE3723072A1 (de) * 1987-07-11 1989-01-19 Basf Ag Verfahren zur entfernung von stickoxiden aus abgasen
EP0326667A1 (de) * 1987-11-28 1989-08-09 Dornier Gmbh Katalysator zur selektiven Reduktion von Stickoxiden
FR2625919B1 (fr) * 1988-01-19 1994-02-11 Institut Francais Petrole Procede et catalyseur pour la reduction selective des oxydes d'azote

Also Published As

Publication number Publication date
AU4672189A (en) 1990-06-21
EP0376025A1 (de) 1990-07-04
CA2005412A1 (en) 1990-06-14
BR8906426A (pt) 1990-08-21
ATE112697T1 (de) 1994-10-15
RU1829954C (ru) 1993-07-23
DE58908501D1 (de) 1994-11-17
DD290816A5 (de) 1991-06-13
KR930000642B1 (ko) 1993-01-29
EP0376025B1 (de) 1994-10-12
AU620479B2 (en) 1992-02-20
DK628589D0 (da) 1989-12-13
KR900009123A (ko) 1990-07-02
US5116586A (en) 1992-05-26
DE3841990C2 (ja) 1992-01-16
DE3841990A1 (de) 1990-06-21
JPH02194819A (ja) 1990-08-01
JPH07100132B2 (ja) 1995-11-01

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