JPS6465018A - Ceric oxide having novel morphological characteristics and manufacture - Google Patents

Ceric oxide having novel morphological characteristics and manufacture

Info

Publication number
JPS6465018A
JPS6465018A JP63159552A JP15955288A JPS6465018A JP S6465018 A JPS6465018 A JP S6465018A JP 63159552 A JP63159552 A JP 63159552A JP 15955288 A JP15955288 A JP 15955288A JP S6465018 A JPS6465018 A JP S6465018A
Authority
JP
Japan
Prior art keywords
ceric oxide
manufacture
morphological characteristics
ceric
novel morphological
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.)
Granted
Application number
JP63159552A
Other languages
English (en)
Other versions
JPH0818833B2 (ja
Inventor
Ruroare Jiyanriyuku
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.)
Rhodia Chimie SAS
Original Assignee
Rhone Poulenc Chimie SA
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 Rhone Poulenc Chimie SA filed Critical Rhone Poulenc Chimie SA
Publication of JPS6465018A publication Critical patent/JPS6465018A/ja
Publication of JPH0818833B2 publication Critical patent/JPH0818833B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • 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
    • B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
    • C01F17/224—Oxides or hydroxides of lanthanides
    • C01F17/235—Cerium oxides or hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/253—Halides
    • C01F17/271—Chlorides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/276—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/282—Sulfates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/30—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/60—Compounds characterised by their crystallite size
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C01P2006/13—Surface area thermal stability thereof at high temperatures
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/16—Pore diameter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
JP63159552A 1987-06-29 1988-06-29 新規な形態学的特徴をもつ酸化第二セリウム Expired - Fee Related JPH0818833B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709122A FR2617154B1 (fr) 1987-06-29 1987-06-29 Procede d'obtention d'oxyde cerique et oxyde cerique a nouvelles caracteristiques morphologiques
FR87/09122 1987-06-29

Publications (2)

Publication Number Publication Date
JPS6465018A true JPS6465018A (en) 1989-03-10
JPH0818833B2 JPH0818833B2 (ja) 1996-02-28

Family

ID=9352611

Family Applications (2)

Application Number Title Priority Date Filing Date
JP63159552A Expired - Fee Related JPH0818833B2 (ja) 1987-06-29 1988-06-29 新規な形態学的特徴をもつ酸化第二セリウム
JP63159551A Expired - Fee Related JPH0761863B2 (ja) 1987-06-29 1988-06-29 酸化第二セリウムの製造方法

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP63159551A Expired - Fee Related JPH0761863B2 (ja) 1987-06-29 1988-06-29 酸化第二セリウムの製造方法

Country Status (12)

Country Link
US (2) US5011671A (ja)
EP (2) EP0300851B1 (ja)
JP (2) JPH0818833B2 (ja)
KR (2) KR910010130B1 (ja)
AT (2) ATE72808T1 (ja)
AU (2) AU608861B2 (ja)
BR (2) BR8803178A (ja)
CA (2) CA1339478C (ja)
DE (2) DE3864931D1 (ja)
ES (2) ES2029524T3 (ja)
FR (1) FR2617154B1 (ja)
GR (2) GR3003131T3 (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6465017A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPS6465019A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPH02221119A (ja) * 1988-12-23 1990-09-04 Rhone Poulenc Chim 改良された形態学的特徴を有する酸化第二セリウム及びその製造方法
JP2002220228A (ja) * 2001-01-18 2002-08-09 Toyota Central Res & Dev Lab Inc 酸化物粉末とその製造方法及び触媒
JP2006082994A (ja) * 2004-09-14 2006-03-30 Daiichi Kigensokagaku Kogyo Co Ltd セリアゾル及びその製造方法並びに酸化第二セリウム
JP2008094698A (ja) * 2006-10-12 2008-04-24 Daiichi Kigensokagaku Kogyo Co Ltd セリウム系酸化物の製造方法
KR100890773B1 (ko) * 2001-09-07 2009-03-31 아난 가세이 가부시키가이샤 산화 제2세륨 및 그 제조법 및 배기가스 정화용 촉매

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2617153B1 (fr) * 1987-06-26 1991-04-05 Rhone Poulenc Chimie Procede d'obtention d'un oxyde cerique et oxyde cerique a nouvelles caracteristiques morphologiques
FR2632945B1 (fr) * 1988-06-15 1991-02-08 Rhone Poulenc Chimie Procede d'obtention d'un oxyde cerique de grande surface specifique
FR2623793B1 (fr) * 1987-11-30 1991-06-07 Rhone Poulenc Chimie Procede de preparation de granules a base d'oxyde de titane, de zirconium, ou de cerium et produits ainsi obtenus
US5279789A (en) * 1988-12-23 1994-01-18 Rhone-Poulenc Chimie Ceric oxide particulates having improved morphology
FR2640953B1 (ja) * 1988-12-23 1991-02-08 Rhone Poulenc Chimie
SK279335B6 (sk) * 1990-08-18 1998-10-07 Chemson Polymer-Additive Gesellschaft M.B.H. Spôsob výroby kovových hydroxidov s malým špecific
US5449387A (en) * 1992-06-17 1995-09-12 Rhone-Poulenc Chemicals Limited Cerium (IV) catalyst compounds and promoting combustion of hydrocarbon fuels therewith
US5417956A (en) * 1992-08-18 1995-05-23 Worcester Polytechnic Institute Preparation of nanophase solid state materials
US5466646A (en) * 1992-08-18 1995-11-14 Worcester Polytechnic Institute Process for the preparation of solid state materials and said materials
US5389352A (en) * 1993-07-21 1995-02-14 Rodel, Inc. Oxide particles and method for producing them
FR2726199A1 (fr) * 1994-10-28 1996-05-03 Rhone Poulenc Chimie Sol organique d'oxyde tetravalent et son utilisation comme additif de composes hydrocarbones
FR2716388B1 (fr) * 1994-02-18 1996-08-02 Rhone Poulenc Chimie Sol organique de composé cérique et son procédé de synthèse.
EP0671205B1 (fr) * 1994-02-18 2000-05-03 Rhodia Chimie Sol organique d'oxyde tétravalent et son utilisation comme additif de composés hydrocarbones
TW311905B (ja) * 1994-07-11 1997-08-01 Nissan Chemical Ind Ltd
US6210451B1 (en) 1995-02-21 2001-04-03 Rhone-Poulenc Chimie Colloidal organic sols comprising tetravalent metal oxide/organic acid complexes
FR2736042B1 (fr) * 1995-06-30 1997-09-12 Rhone Poulenc Chimie Dispersion colloidale et composition redispersible sous forme d'une dispersion colloidale a base d'oxyde de cerium
FR2741869B1 (fr) * 1995-12-04 1998-02-06 Rhone Poulenc Chimie Oxyde de cerium a pores de structure lamellaire, procede de preparation et utilisation en catalyse
KR100336598B1 (ko) * 1996-02-07 2002-05-16 이사오 우치가사키 산화 세륨 연마제 제조용 산화 세륨 입자
KR100759182B1 (ko) * 1996-09-30 2007-09-14 히다치 가세고교 가부시끼가이샤 산화세륨 입자
SG72802A1 (en) * 1997-04-28 2000-05-23 Seimi Chem Kk Polishing agent for semiconductor and method for its production
JPH11181403A (ja) * 1997-12-18 1999-07-06 Hitachi Chem Co Ltd 酸化セリウム研磨剤及び基板の研磨法
US6933417B1 (en) 1999-11-22 2005-08-23 Dow Global Technologies Inc. Process for vinyl chloride manufacture from ethane and ethylene with partial CHl recovery from reactor effluent
US6909024B1 (en) 1999-11-22 2005-06-21 The Dow Chemical Company Process for the conversion of ethylene to vinyl chloride and novel catalyst compositions useful for such process
US6680415B1 (en) * 1999-11-22 2004-01-20 Dow Global Technologies Inc. Oxyhalogenation process using catalyst having porous rare earth halide support
US6797845B1 (en) 1999-11-22 2004-09-28 Dow Global Technologies Inc. Process for vinyl chloride manufacture from ethane and ethylene with immediate HCl recovery from reactor effluent
CA2448500C (en) * 2001-05-23 2009-11-17 Dow Global Technologies Inc. Oxidative halogenation and optional dehydrogenation of c3+ hydrocarbons
AU2002359356A1 (en) * 2001-11-16 2003-06-10 Ferro Corporation Particles for use in cmp slurries and method for producing them
US6596042B1 (en) 2001-11-16 2003-07-22 Ferro Corporation Method of forming particles for use in chemical-mechanical polishing slurries and the particles formed by the process
US20060032836A1 (en) * 2001-11-16 2006-02-16 Ferro Corporation Methods of controlling the properties of abrasive particles for use in chemical-mechanical polishing slurries
US7666239B2 (en) * 2001-11-16 2010-02-23 Ferro Corporation Hydrothermal synthesis of cerium-titanium oxide for use in CMP
KR100477939B1 (ko) * 2002-04-15 2005-03-18 주식회사 엘지화학 단결정 산화세륨 분말의 제조방법
US20040152929A1 (en) * 2002-05-08 2004-08-05 Clarke William D Process for vinyl chloride manufacture from ethane and ethylene with air feed and alternative hcl processing methods
US20050108947A1 (en) * 2003-11-26 2005-05-26 Mueller Brian L. Compositions and methods for chemical mechanical polishing silica and silicon nitride
US20060021972A1 (en) * 2004-07-28 2006-02-02 Lane Sarah J Compositions and methods for chemical mechanical polishing silicon dioxide and silicon nitride
KR100725699B1 (ko) 2005-09-02 2007-06-07 주식회사 엘지화학 일액형 ｃｍｐ 슬러리용 산화 세륨 분말, 그 제조방법,이를 포함하는 일액형 ｃｍｐ 슬러리 조성물, 및 상기슬러리를 사용하는 얕은 트랜치 소자 분리방법
US8105318B2 (en) * 2006-11-14 2012-01-31 Ams Research Corporation Introducer and valve cap for anastomosis device
US20100166996A1 (en) * 2007-06-08 2010-07-01 Igor Chorvath Fluorosilicone Elastomers For High Temperature Performance
FR2962431B1 (fr) 2010-07-07 2018-01-19 Rhodia Operations Composition a base d'oxydes de cerium, de niobium et, eventuellement, de zirconium et son utilisation en catlyse.
FR2965189A1 (fr) 2010-09-29 2012-03-30 Rhodia Operations Procede de traitement d'un gaz contenant des oxydes d'azote (nox) utilisant comme catalyseur une composition a base d'oxyde de cerium et d'oxyde de niobium
ES2524405T3 (es) * 2012-02-15 2014-12-09 Dsm Ip Assets B.V. Nuevo procedimiento para fabricar metil-limonitrilo
US9458096B2 (en) * 2012-02-15 2016-10-04 Dsm Ip Assets B.V. Process for the manufacture of methyl limonitrile
JP5706546B1 (ja) 2013-06-04 2015-04-22 新日本電工株式会社 セリア−ジルコニア系複合酸化物及びその製造方法
US9663446B2 (en) 2013-10-15 2017-05-30 Rhodia Operations Process for forming a primary, a secondary or a tertiary amine via a direct amination reaction
WO2015117264A1 (en) * 2014-02-07 2015-08-13 Xi'an Jiaotong University Cerium dioxide nanoparticles and methods for their preparation and use
US11655405B2 (en) * 2014-09-12 2023-05-23 Taiwan Semiconductor Manufacturing Company Limited Method of manufacturing cerium dioxide powder and cerium dioxide powder
EP3218350B1 (en) 2014-11-10 2022-01-05 Rhodia Operations Process for forming amine by direct amination reaction
JP6739434B2 (ja) 2014-12-22 2020-08-12 パフォーマンス・ポリアミデス，エスアエス シクロアルカンの酸化触媒並びにアルコール及びケトンの製造方法
US10179756B2 (en) 2015-05-18 2019-01-15 Rhodia Operations Process for oxidation of alcohols using oxygen-containing gases
US11572330B2 (en) 2018-01-30 2023-02-07 Basf Se Method for oxidation of cycloalkanes
KR102162974B1 (ko) * 2018-10-17 2020-10-07 창원대학교 산학협력단 용매열 합성법을 이용한 금속이온 도핑 세리아의 제조방법
CN112939052B (zh) * 2021-03-22 2022-12-09 北方稀土生一伦高科技有限公司 一种小粒度氧化铈的制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239323A (ja) * 1984-02-20 1985-11-28 ロ−ヌ−プ−ラン・スペシアリテ・シミ−ク 新規な形態的特徴を持つ酸化第二セリウム及びその製造方法
JPS6465019A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPS6465017A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide

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US4231997A (en) * 1979-04-05 1980-11-04 Engelhard Minerals & Chemicals Corporation Preparation of rare earth nitrates
US4545923A (en) * 1982-06-11 1985-10-08 Rhone-Poulenc Inc. Process for preparing colloidal ceric oxide and complexes thereof with free organic acids
US4647401A (en) * 1983-01-24 1987-03-03 Rhone Poulenc Inc. Process for preparing colloidal ceric oxide and complexes thereof with free organic acids
FR2545830B1 (fr) * 1983-05-13 1986-01-03 Rhone Poulenc Spec Chim Nouvelle composition de polissage a base de cerium et son procede de fabrication
SU1159886A1 (ru) * 1983-06-10 1985-06-07 МГУ им.М.В.Ломоносова Способ разделени редкоземельных элементов
FR2549846B1 (fr) * 1983-07-29 1986-12-26 Rhone Poulenc Spec Chim Nouvelle composition de polissage a base de cerium et son procede de fabrication
JPS6096527A (ja) * 1983-11-01 1985-05-30 Asahi Chem Ind Co Ltd 軽希土中のセリウムを分離する法
FR2559755A1 (fr) * 1984-02-20 1985-08-23 Rhone Poulenc Spec Chim Oxyde cerique a nouvelles caracteristiques morphologiques et son procede d'obtention
FR2583736B1 (fr) * 1985-06-20 1987-08-14 Rhone Poulenc Spec Chim Nouveau compose de cerium iv et son procede de preparation.
FR2584388B1 (fr) * 1985-07-03 1991-02-15 Rhone Poulenc Spec Chim Composition a base d'oxyde cerique, sa preparation et ses utilisations
FR2587036A1 (fr) * 1985-09-10 1987-03-13 Rhone Poulenc Spec Chim Procede de traitement de minerais de terres rares
FR2593195B1 (fr) * 1986-01-22 1988-08-12 Centre Nat Rech Scient Nouvelles compositions particulaires d'oxyde de terre rare, leur preparation et leur application
FR2596381B1 (fr) * 1986-03-26 1988-05-27 Rhone Poulenc Chimie Oxydes ceriques a nouvelles caracteristiques morphologiques et leur procede d'obtention
FR2596382B1 (fr) * 1986-03-26 1988-05-27 Rhone Poulenc Chimie Dispersions aqueuses colloidales d'un compose de cerium iv et leur procede d'obtention
FR2608583B1 (fr) * 1986-12-19 1990-12-07 Rhone Poulenc Chimie Oxyde cerique a nouvelles caracteristiques morphologiques et son procede d'obtention

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239323A (ja) * 1984-02-20 1985-11-28 ロ−ヌ−プ−ラン・スペシアリテ・シミ−ク 新規な形態的特徴を持つ酸化第二セリウム及びその製造方法
JPS6465019A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPS6465017A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6465017A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPS6465019A (en) * 1987-06-29 1989-03-10 Rhone Poulenc Chimie Manufacture of ceric oxide
JPH02221119A (ja) * 1988-12-23 1990-09-04 Rhone Poulenc Chim 改良された形態学的特徴を有する酸化第二セリウム及びその製造方法
JP2002220228A (ja) * 2001-01-18 2002-08-09 Toyota Central Res & Dev Lab Inc 酸化物粉末とその製造方法及び触媒
KR100890773B1 (ko) * 2001-09-07 2009-03-31 아난 가세이 가부시키가이샤 산화 제2세륨 및 그 제조법 및 배기가스 정화용 촉매
JP2006082994A (ja) * 2004-09-14 2006-03-30 Daiichi Kigensokagaku Kogyo Co Ltd セリアゾル及びその製造方法並びに酸化第二セリウム
JP2008094698A (ja) * 2006-10-12 2008-04-24 Daiichi Kigensokagaku Kogyo Co Ltd セリウム系酸化物の製造方法

Also Published As

Publication number Publication date
KR910010130B1 (ko) 1991-12-17
DE3868553D1 (de) 1992-04-02
US5011671A (en) 1991-04-30
JPH0818833B2 (ja) 1996-02-28
FR2617154B1 (fr) 1990-11-30
JPS6465017A (en) 1989-03-10
FR2617154A1 (fr) 1988-12-30
US5023070A (en) 1991-06-11
AU1851988A (en) 1989-01-05
JPH0761863B2 (ja) 1995-07-05
ES2024665B3 (es) 1992-03-01
GR3004214T3 (ja) 1993-03-31
BR8803179A (pt) 1989-01-24
KR910010131B1 (ko) 1991-12-17
DE3864931D1 (de) 1991-10-24
ATE72808T1 (de) 1992-03-15
GR3003131T3 (en) 1993-02-17
AU1851688A (en) 1989-01-05
CA1340315C (fr) 1999-01-12
KR890000346A (ko) 1989-03-14
EP0300852B1 (fr) 1991-09-18
AU610902B2 (en) 1991-05-30
KR890000347A (ko) 1989-03-14
EP0300852A1 (fr) 1989-01-25
AU608861B2 (en) 1991-04-18
ATE67468T1 (de) 1991-10-15
EP0300851B1 (fr) 1992-02-26
ES2029524T3 (es) 1992-08-16
CA1339478C (fr) 1997-09-30
BR8803178A (pt) 1989-01-24
EP0300851A1 (fr) 1989-01-25

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