DE3913972C2 - - Google Patents

Info

Publication number
DE3913972C2
DE3913972C2 DE3913972A DE3913972A DE3913972C2 DE 3913972 C2 DE3913972 C2 DE 3913972C2 DE 3913972 A DE3913972 A DE 3913972A DE 3913972 A DE3913972 A DE 3913972A DE 3913972 C2 DE3913972 C2 DE 3913972C2
Authority
DE
Germany
Prior art keywords
oxide
cerium
zirconium
salt
rare earth
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.)
Expired - Lifetime
Application number
DE3913972A
Other languages
German (de)
English (en)
Other versions
DE3913972A1 (de
Inventor
Masakuni Kasugai Aichi Jp Ozawa
Mareo Kimura
Akio Nagoya Aichi Jp Isogai
Shinichi Aichi Jp Matsumoto
Naoto Nagoya Aichi Jp Miyoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of DE3913972A1 publication Critical patent/DE3913972A1/de
Application granted granted Critical
Publication of DE3913972C2 publication Critical patent/DE3913972C2/de
Granted legal-status Critical Current

Links

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
    • B01D53/92—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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals with rare earths or actinides
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • 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
    • 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
    • B01D2255/20715—Zirconium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
DE3913972A 1988-04-30 1989-04-27 Katalysator fuer die reinigung von abgasen Granted DE3913972A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63108834A JPH0644999B2 (ja) 1988-04-30 1988-04-30 排気ガス浄化用触媒

Publications (2)

Publication Number Publication Date
DE3913972A1 DE3913972A1 (de) 1989-11-09
DE3913972C2 true DE3913972C2 (US08087162-20120103-C00010.png) 1992-03-12

Family

ID=14494735

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3913972A Granted DE3913972A1 (de) 1988-04-30 1989-04-27 Katalysator fuer die reinigung von abgasen

Country Status (3)

Country Link
US (1) US5075276A (US08087162-20120103-C00010.png)
JP (1) JPH0644999B2 (US08087162-20120103-C00010.png)
DE (1) DE3913972A1 (US08087162-20120103-C00010.png)

Families Citing this family (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456919A3 (en) * 1990-04-16 1992-01-22 W.R. Grace & Co.-Conn. Catalytic converter system
JP2773428B2 (ja) * 1990-11-28 1998-07-09 トヨタ自動車株式会社 排気ガス浄化方法
CA2064977C (en) * 1991-04-05 1998-09-22 Eiichi Shiraishi Catalyst for purifying exhaust gas
FI90501C (fi) * 1992-02-13 1994-02-25 Kemira Oy Menetelmä tehostaa kolmitoimikatalysaattorin toimintaa
FI90631C (fi) * 1992-04-23 1994-03-10 Kemira Oy Menetelmä katalyytissä käytettävän tukiaineen parantamiseksi
FR2699524B1 (fr) * 1992-12-21 1995-02-10 Rhone Poulenc Chimie Composition à base d'un oxyde mixte de cérium et de zirconium, préparation et utilisation.
CA2165054A1 (en) * 1993-06-25 1995-01-05 Zhicheng Hu Layered catalyst composite
US5500198A (en) * 1993-10-26 1996-03-19 Massachusetts Institute Of Technology Composite catalyst for carbon monoxide and hydrocarbon oxidation
JP3409894B2 (ja) * 1993-11-17 2003-05-26 トヨタ自動車株式会社 排ガス浄化用触媒及び排ガス浄化方法
FR2720296B1 (fr) * 1994-05-27 1996-07-12 Rhone Poulenc Chimie Composés à base d'alumine, d'oxyde de cérium et d'oxyde de zirconium à réductibilité élevée, leur procédé de préparation et leur utilisation dans la préparation de catalyseurs.
EP0707882A1 (en) * 1994-10-21 1996-04-24 Toyota Jidosha Kabushiki Kaisha Catalyst for purifying exhaust gases
US5945369A (en) * 1994-12-09 1999-08-31 Kabushiki Kaisha Toyota Chuo Kenkyusho Catalyst for purifying exhaust gases and process for producing the same
JP3664182B2 (ja) * 1994-12-19 2005-06-22 トヨタ自動車株式会社 高耐熱性排ガス浄化用触媒とその製造方法
DE19506843A1 (de) * 1995-02-28 1996-08-29 Studiengesellschaft Kohle Mbh Mikroporöse amorphe Mischmetalloxide für formselektive Katalyse
JP3861303B2 (ja) * 1995-10-31 2006-12-20 トヨタ自動車株式会社 排ガス浄化用触媒
US20040086441A1 (en) * 1995-12-06 2004-05-06 Masao Hori Process for purifying exhaust gas from gasoline engines
US5837642A (en) * 1995-12-26 1998-11-17 Daihatsu Motor Co., Ltd. Heat-resistant oxide
JP2840054B2 (ja) * 1995-12-26 1998-12-24 ダイハツ工業株式会社 耐熱性酸化物
JP3494331B2 (ja) 1996-02-02 2004-02-09 トヨタ自動車株式会社 排ガス浄化用触媒及びその製造方法
DE19713103A1 (de) * 1996-03-28 1997-10-02 Mazda Motor Abgasreinigungskatalysator und dessen Herstellungsverfahren
DE69728341T2 (de) * 1996-10-07 2004-12-30 Kabushiki Kaisha Toyota Chuo Kenkyusho Verbundoxid, Verbundoxidträger und Katalysator
US6506705B2 (en) 1996-12-06 2003-01-14 Rhodia Chimie Composition based on cerium oxide or on cerium and zirconium oxides, in the extruded form, process for the preparation thereof and use thereof as catalyst
FR2757425B3 (fr) * 1996-12-23 1999-03-19 Rhodia Chimie Sa Procede de traitement de gaz d'echappement de moteurs a combustion interne fonctionnant avec un carburant contenant du soufre
JP3429967B2 (ja) * 1997-02-10 2003-07-28 ダイハツ工業株式会社 酸素吸蔵性セリウム系複合酸化物
US6107240A (en) * 1997-03-26 2000-08-22 Engelhard Corporation Catalyst composition containing an intimately mixed oxide of cerium and praseodymium
US5888464A (en) * 1997-04-08 1999-03-30 Engelhard Corporation Catalyst composition containing an intimately combined cerium-zirconium oxide
FR2770790B1 (fr) * 1997-11-10 1999-12-10 Rhodia Chimie Sa Composition a support a base d'un oxyde de cerium, d'un oxyde de zirconium et d'un oxyde de scandium ou de terre rare et utilisation pour le traitement des gaz d'echappement
JP3827838B2 (ja) * 1997-11-20 2006-09-27 ダイハツ工業株式会社 排気ガス浄化用触媒
JP3688871B2 (ja) * 1997-11-20 2005-08-31 ダイハツ工業株式会社 排気ガス浄化用触媒
US6335305B1 (en) * 1999-01-18 2002-01-01 Kabushiki Kaisha Toyota Chuo Kenkyusho Catalyst for purifying exhaust gas
CN1094467C (zh) * 1999-02-15 2002-11-20 上海跃龙有色金属有限公司 纳米铈锆复合氧化物、其制备方法及用途
US6492298B1 (en) * 1999-03-29 2002-12-10 Kabushiki Kaisha Toyota Chuo Kenkyusho Ordinary-temperature purifying catalyst
BR0001560B1 (pt) * 1999-04-09 2010-04-06 processo para produzir um corpo cerámico-catalisador, e, corpo cerámico-catalisador.
DE10024994A1 (de) 1999-05-24 2001-01-04 Daihatsu Motor Co Ltd Katalytischer Umwandler zum Reinigen von Abgasen
US6881384B1 (en) 1999-08-30 2005-04-19 Daihatsu Motor Co., Ltd. Catalytic converter for cleaning exhaust gas
JP4443685B2 (ja) * 1999-09-10 2010-03-31 三井金属鉱業株式会社 排気ガス浄化用助触媒の製造方法
JP3688953B2 (ja) * 1999-10-08 2005-08-31 ダイハツ工業株式会社 排気ガス浄化用触媒
NO313494B1 (no) * 2000-07-05 2002-10-14 Norsk Hydro As Katalysator for spalting av dinitrogenoksid og fremgangsmåte ved utförelse av prosesser hvor det dannes dinitrogenoksid
JP3758487B2 (ja) * 2000-09-08 2006-03-22 トヨタ自動車株式会社 吸収還元型ｎｏｘ浄化用触媒
US7081431B2 (en) 2000-09-08 2006-07-25 Toyota Jidosha Kabushiki Kaisha NOx absorbent and absorption reduction-type NOx purifying catalyst
US6492297B1 (en) * 2000-09-15 2002-12-10 Engelhard Corporation Catalyst composition for purifying exhaust gas
US6585944B1 (en) * 2000-10-17 2003-07-01 Delphi Technologies, Inc. Enhancement of the OSC properties of Ce-Zr based solid solutions
US7641875B1 (en) * 2000-11-15 2010-01-05 Catalytic Solutions, Inc. Mixed-phase ceramic oxide three-way catalyst formulations and methods for preparing the catalysts
GB0028240D0 (en) * 2000-11-20 2001-01-03 Johnson Matthey Plc Three-way catalyst composition
JP4030320B2 (ja) * 2001-03-22 2008-01-09 株式会社デンソー セラミック体およびセラミック触媒体
JP4397155B2 (ja) * 2001-09-27 2010-01-13 東京濾器株式会社 排気ガス浄化用触媒、及びその触媒の製造方法
US20030092567A1 (en) * 2001-11-12 2003-05-15 Masakazu Tanaka Ceramic catalyst body
ATE376880T1 (de) * 2002-03-22 2007-11-15 Ibiden Co Ltd Herstellungsverfahren eines wabenfilters zur reinigung von abgas
US6949267B2 (en) * 2002-04-08 2005-09-27 Engelhard Corporation Combinatorial synthesis
JP4079717B2 (ja) * 2002-08-05 2008-04-23 株式会社日本自動車部品総合研究所 セラミック触媒体
JP4584555B2 (ja) * 2002-10-17 2010-11-24 株式会社デンソー セラミック触媒体
US6857431B2 (en) * 2002-12-09 2005-02-22 Philip Morris Usa Inc. Nanocomposite copper-ceria catalysts for low temperature or near-ambient temperature catalysis and methods for making such catalysts
EP1433745A2 (en) * 2002-12-26 2004-06-30 Matsushita Electric Industrial Co., Ltd. Catalyst for the removal of carbon monoxide, its method of manufacture and its uses
JP4503314B2 (ja) 2003-03-10 2010-07-14 株式会社キャタラー 排ガス浄化用触媒
US20040180782A1 (en) * 2003-03-10 2004-09-16 Cataler Corporation Exhaust-gas purifying catalyst
MXPA05011649A (es) * 2003-04-29 2005-12-15 Johnson Matthey Plc Catalizador de descomposicion de ozono basado en manganeso y proceso para su preparacion.
US7452843B2 (en) * 2003-12-29 2008-11-18 Umicore Ag & Co. Kg Exhaust treatment devices, catalyst, and methods of making and using the same
JP4959129B2 (ja) * 2004-02-16 2012-06-20 株式会社キャタラー 排ガス浄化用触媒
JP4547607B2 (ja) * 2004-04-23 2010-09-22 トヨタ自動車株式会社 排ガス浄化用触媒
EP1632288B1 (en) * 2004-09-03 2012-06-20 Mazda Motor Corporation Exhaust gas purification catalyst and oxygen storage component for the same
JP4979900B2 (ja) * 2005-06-16 2012-07-18 株式会社キャタラー 排ガス浄化用触媒
JP4465305B2 (ja) * 2005-06-16 2010-05-19 株式会社キャタラー 排ガス浄化用触媒
CN100364662C (zh) * 2005-08-29 2008-01-30 浙江大学 稀土复合多孔氧化铝负载Pd催化剂的制备方法
JP4714568B2 (ja) * 2005-11-22 2011-06-29 マツダ株式会社 排気ガス浄化用触媒及びその製造方法
JP4851190B2 (ja) * 2006-01-13 2012-01-11 戸田工業株式会社 排気ガス浄化用触媒
JP4835193B2 (ja) * 2006-02-20 2011-12-14 マツダ株式会社 ディーゼルパティキュレートフィルタ
JP2008100152A (ja) 2006-10-18 2008-05-01 Cataler Corp 排ガス浄化用触媒
JP2008100202A (ja) 2006-10-20 2008-05-01 Cataler Corp 排ガス浄化用触媒
JP5173180B2 (ja) 2006-10-30 2013-03-27 株式会社キャタラー 排ガス浄化用触媒
CN100998941B (zh) * 2007-01-04 2012-09-05 华东理工大学 一种前置催化剂及其制备方法
JP5173282B2 (ja) 2007-07-04 2013-04-03 株式会社キャタラー 排ガス浄化用触媒
WO2009078246A1 (ja) * 2007-12-14 2009-06-25 Nissan Motor Co., Ltd. 浄化触媒
FR2930456B1 (fr) * 2008-04-23 2010-11-19 Rhodia Operations Composition a base d'oxydes de zirconium, de cerium et d'yttrium, a reductibilite elevee, procedes de preparation et utilisation en catalyse
FR2961411B1 (fr) * 2010-06-16 2013-08-09 Saint Gobain Ct Recherches Systeme de catalyse electrochimique
KR101326924B1 (ko) * 2011-09-21 2013-11-11 현대자동차주식회사 차량의 촉매 코팅액 제조방법 및 이를 이용한 촉매체 제조방법 및 촉매체
CN102580734B (zh) * 2012-02-22 2014-06-11 华东理工大学 用于高含水量丙烯酸废气净化的整体式催化剂及制备方法
JP5502971B1 (ja) * 2012-11-16 2014-05-28 三井金属鉱業株式会社 排気ガス用触媒担体及び排ガス浄化触媒
KR20210005550A (ko) * 2018-02-15 2021-01-14 스미또모 가가꾸 가부시끼가이샤 무기 산화물
JP7450359B2 (ja) * 2019-10-01 2024-03-15 株式会社キャタラー 排ガス浄化用触媒
CN113019370B (zh) * 2019-12-09 2022-11-22 中国科学院大连化学物理研究所 一种催化剂、其制备方法和应用
WO2021166382A1 (ja) * 2020-02-21 2021-08-26 株式会社キャタラー 排ガス浄化用触媒
CN116408059A (zh) * 2023-03-31 2023-07-11 湖北群有长物环保科技有限公司 一种稀土基高效烟气脱硝催化剂及其制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4170573A (en) * 1978-04-07 1979-10-09 W. R. Grace & Co. Rare earth and platinum group metal catalyst compositions
DE2853547C2 (de) * 1978-12-12 1983-11-03 Degussa Ag, 6000 Frankfurt Von Strömungskanälen durchzogener Träger für Katalysatoren mit Querstromeffekt und Verwendung
CA1213874A (en) * 1983-05-12 1986-11-12 Tomohisa Ohata Process for producing honeycomb catalyst for exhaust gas conversion
JPS60110334A (ja) * 1983-11-21 1985-06-15 Nissan Motor Co Ltd 排ガス浄化用触媒の製造方法
AU595655B2 (en) * 1986-11-04 1990-04-05 Kabushiki Kaisha Toyota Chuo Kenkyusho Catalyst for the purification of exhaust gas

Also Published As

Publication number Publication date
JPH01281144A (ja) 1989-11-13
JPH0644999B2 (ja) 1994-06-15
US5075276A (en) 1991-12-24
DE3913972A1 (de) 1989-11-09

Similar Documents

Publication Publication Date Title
DE3913972C2 (US08087162-20120103-C00010.png)
EP1101528B1 (de) Verfahren zur Herstellung eines Stickoxid-Speichermaterials und damit hergestelltes Speichermaterial
DE3737419C2 (US08087162-20120103-C00010.png)
EP2326416B1 (de) Stickoxid-speicherkatalysator zum einsatz im kraftfahrzeug in motornaher position
DE3806960C2 (US08087162-20120103-C00010.png)
DE3726580C2 (US08087162-20120103-C00010.png)
DE19807646B4 (de) Katalysator für die Abgasreinigung, dessen Verwendung und Verfahren zu dessen Herstellung
DE69018571T2 (de) Abgasreinigungskatalysator mit ausgezeichneter thermischer beständigkeit und verfahren zu seiner herstellung.
DE69516281T2 (de) Zusammengesetzter katalysator mit schichtstruktur
DE19707275B4 (de) Abgas-Reinigungskatalysator
DE19805259B4 (de) Sauerstoff speicherndes Zer-Komplexoxid
DE60121554T2 (de) Mehrzonen-speicherkatalysator und verfahren zu dessen herstellung und dessen verwendung
DE3640025C2 (US08087162-20120103-C00010.png)
DE68913223T2 (de) Katalysator zur Abgasreinigung und sein Herstellungsverfahren.
DE2825200C2 (US08087162-20120103-C00010.png)
DE69435061T2 (de) Katalysatorzusammensetzung
DE69208206T2 (de) Katalysatorsystem zur Behandlung von Abgasen aus Brennkraftmaschinen mit Verbrennung eines armen Gemisches
DE60122204T2 (de) Dreiwegekatalysator-zusammensetzung mit manganhaltiger sauerstoffspeicherkomponente
DE69004002T2 (de) Uran, mindestens einem Promotor für Uran und mindestens ein Edelmetall enthaltender Multifunktionskatalysator für die Behandlung von Abgasen der Verbrennungsmotoren und dessen Herstellung.
DE10024994A1 (de) Katalytischer Umwandler zum Reinigen von Abgasen
DD147146A5 (de) Verfahren zur umwandlung von kohlenmonoxid-,kohlenwasserstoff-und stickstoffoxidkomponenten
DE202007019526U1 (de) NOx-Speichermaterialien und -Fallen, die gegenüber Wärmealterung beständig sind
DE2841417A1 (de) Katalysatorzusammensetzungen, verfahren zu ihrer herstellung und ihre verwendung
DE4436890A1 (de) Verfahren zur gleichzeitigen Verminderung der im Abgas einer Verbrennungskraftmaschine enthaltenen Kohlenwasserstoffe, Kohlenmonoxid und Stickoxide
DE3743626A1 (de) Katalysator fuer die reinigung von auspuffgasen

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8128 New person/name/address of the agent

Representative=s name: TIEDTKE, H., DIPL.-ING. BUEHLING, G., DIPL.-CHEM.

D2 Grant after examination
8364 No opposition during term of opposition