JPS53119800A - Almina composition and method of making same - Google Patents
Almina composition and method of making sameInfo
- Publication number
- JPS53119800A JPS53119800A JP3479878A JP3479878A JPS53119800A JP S53119800 A JPS53119800 A JP S53119800A JP 3479878 A JP3479878 A JP 3479878A JP 3479878 A JP3479878 A JP 3479878A JP S53119800 A JPS53119800 A JP S53119800A
- Authority
- JP
- Japan
- Prior art keywords
- almina
- composition
- making same
- making
- same
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title 1
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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
-
- 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
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/31—Density
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/635—0.5-1.0 ml/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/638—Pore volume more than 1.0 ml/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
-
- 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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
-
- 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
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- C01P2006/10—Solid density
-
- 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
- C01P2006/11—Powder tap density
-
- 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
-
- 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
-
- 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
- C01P2006/17—Pore diameter distribution
-
- 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
- C01P2006/21—Attrition-index or crushing strength of granulates
-
- 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
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/781,379 US4179408A (en) | 1977-03-25 | 1977-03-25 | Process for preparing spheroidal alumina particles |
US05/781,393 US4154812A (en) | 1977-03-25 | 1977-03-25 | Process for preparing alumina |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53119800A true JPS53119800A (en) | 1978-10-19 |
JPH0152328B2 JPH0152328B2 (ja) | 1989-11-08 |
Family
ID=27119846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3479878A Granted JPS53119800A (en) | 1977-03-25 | 1978-03-25 | Almina composition and method of making same |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS53119800A (ja) |
DE (2) | DE2812875A1 (ja) |
FR (2) | FR2405899B1 (ja) |
GB (4) | GB1603462A (ja) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58119341A (ja) * | 1981-12-30 | 1983-07-15 | ダブリユー・アール・グレイス・アンド・カンパニー―コネチカツト | 触媒担体 |
JPS58120518A (ja) * | 1981-12-30 | 1983-07-18 | ペ・セ・ユ−・カ・プロデユイ・シミク・ユ−ジヌ・ク−ルマン | 高純度アルミナの製造方法 |
JPS58190823A (ja) * | 1982-04-26 | 1983-11-07 | Chiyoda Chem Eng & Constr Co Ltd | アルミナ担体の製造方法 |
JPS6044054A (ja) * | 1983-07-27 | 1985-03-08 | ダブリユ−・ア−ル・グレイス・アンド・カンパニ− | 小ビ−ズ状の自動車廃ガス用触媒 |
JPS6340724A (ja) * | 1986-08-04 | 1988-02-22 | Kumamoto Pref Gov | 低ソ−ダアルミナ粉体の製造方法 |
JP2001139326A (ja) * | 1999-08-30 | 2001-05-22 | Sumitomo Chem Co Ltd | ベーマイト及びそれを用いて形成してなる磁気記録媒体の下地層 |
JP2002519297A (ja) * | 1998-07-06 | 2002-07-02 | アンスティテュ フランセ デュ ペトロール | 新規分散性水和アルミニウム、その調製方法および触媒の調製におけるその使用法 |
JP2009519203A (ja) * | 2005-12-12 | 2009-05-14 | ダブリュー・アール・グレース・アンド・カンパニー−コーン | アルミナ粒子及びその製造方法 |
JP2014500217A (ja) * | 2010-11-16 | 2014-01-09 | ロディア オペレーションズ | アルミナ触媒担体 |
JP2014097984A (ja) * | 2012-11-15 | 2014-05-29 | IFP Energies Nouvelles | Euoゼオライトおよび特定含有率のナトリウムをベースとする触媒の存在下での芳香族c8留分の異性化方法 |
JP2015500788A (ja) * | 2011-12-20 | 2015-01-08 | イエフペ エネルジ ヌヴェルIfp Energies Nouvelles | 回転楕円体状アルミナ粒子の製造方法 |
JP2015511884A (ja) * | 2012-02-17 | 2015-04-23 | アドバンスド・リフアイニング・テクノロジーズ・エルエルシー | 残油脱金属用回転楕円形触媒 |
KR20170039721A (ko) * | 2014-08-08 | 2017-04-11 | 사솔 퍼포먼스 케미컬스 게엠베하 | 침강 알루미나 및 제조방법 |
JP2017521343A (ja) * | 2014-06-13 | 2017-08-03 | イエフペ エネルジ ヌヴェルIfp Energies Nouvelles | 高分散性ゲルおよびその調製方法 |
US10584288B2 (en) | 2012-02-17 | 2020-03-10 | Advanced Refining Technologies Llc | Extruded resid demetallation catalyst |
DE112021007314T5 (de) | 2021-03-19 | 2024-01-04 | Jgc Catalysts And Chemicals Ltd. | Siliciumdioxid-Aluminiumoxid-Pulver, Verfahren zur Herstellung von Siliciumdioxid-Aluminiumoxid-Pulver, Katalysator für Fluid Catalytic Cracking und Verfahren zu dessen Herstellung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3212249C2 (de) * | 1982-04-02 | 1986-08-21 | Condea Chemie GmbH, 2212 Brunsbüttel | Verfahren zur Herstellung von kugelförmiger Tonerde |
JP3715482B2 (ja) * | 1999-11-04 | 2005-11-09 | エヌ・イーケムキャット株式会社 | 水素含有ガス中の一酸化炭素選択酸化触媒並びに該触媒を用いた一酸化炭素除去方法及び固体高分子電解質型燃料電池システム |
DE10221668B4 (de) * | 2002-05-16 | 2005-04-28 | Daimler Chrysler Ag | Kugelkatalysator für Verbrennungskraftmaschinen und Verfahren zur Katalyse von Abgasen bzw. Schadstoffgemischen |
US10443100B2 (en) | 2014-05-22 | 2019-10-15 | The Scripps Research Institute | Gene expression profiles associated with sub-clinical kidney transplant rejection |
CN112429755A (zh) * | 2020-11-18 | 2021-03-02 | 山东物华新材料科技有限公司 | 一种水处理活性氧化铝球的制备方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1958710A (en) * | 1933-03-23 | 1934-05-15 | Paul S Moyer | Colloidal aluminum hydroxide and method of making the same |
US2492167A (en) * | 1943-06-01 | 1949-12-27 | Socony Vacuum Oil Co Inc | Process of forming alumina-containing gel beads |
FR1267749A (fr) * | 1960-09-21 | 1961-07-21 | Nalco Chemical Co | Procédé de préparation d'un support de catalyseur en alumine et produits en résultant |
GB1076450A (en) * | 1963-12-06 | 1967-07-19 | Grace W R & Co | Improvements relating to the production of alumina gels |
FR1414641A (fr) * | 1963-12-06 | 1965-10-15 | Grace W R & Co | Procédé perfectionné de préparation de gels d'alumine par atomisation et gels d'alumine obtenus par ce procédé |
GB1094487A (en) * | 1964-06-26 | 1967-12-13 | Grace W R & Co | Alumina gels |
DE1592098C3 (de) | 1965-12-13 | 1978-05-11 | Engelhard Minerals & Chemicals Corp., Murray Hill, N.J. (V.St.A.) | Verfahren zur Herstellung von kugelförmigen Aluminiumoxidteilchen |
JPS4933321B1 (ja) * | 1970-12-07 | 1974-09-06 | ||
DE2302724A1 (de) * | 1972-01-19 | 1973-08-09 | Grace W R & Co | Kontinuierliches verfahren zur herstellung von aluminiumoxyd |
US3864461A (en) * | 1972-08-29 | 1975-02-04 | Laporte Industries Ltd | Process for the production of alumina |
US3864451A (en) * | 1973-08-16 | 1975-02-04 | Environics Inc | Method for Removing Nitric Oxide from Combustion Gases |
JPS5072897A (ja) * | 1973-10-31 | 1975-06-16 | ||
US3979334A (en) * | 1975-04-16 | 1976-09-07 | Universal Oil Products Company | Manufacture of spheroidal alumina particles |
-
1978
- 1978-03-23 GB GB29046/80A patent/GB1603462A/en not_active Expired
- 1978-03-23 DE DE19782812875 patent/DE2812875A1/de active Granted
- 1978-03-23 GB GB29047/80A patent/GB1603463A/en not_active Expired
- 1978-03-23 GB GB29154/80A patent/GB1603464A/en not_active Expired
- 1978-03-23 DE DE2858783A patent/DE2858783C2/de not_active Expired - Lifetime
- 1978-03-23 GB GB11808/78A patent/GB1603461A/en not_active Expired
- 1978-03-25 JP JP3479878A patent/JPS53119800A/ja active Granted
- 1978-03-28 FR FR7808965A patent/FR2405899B1/fr not_active Expired
- 1978-09-19 FR FR7826852A patent/FR2405900B1/fr not_active Expired
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58119341A (ja) * | 1981-12-30 | 1983-07-15 | ダブリユー・アール・グレイス・アンド・カンパニー―コネチカツト | 触媒担体 |
JPS58120518A (ja) * | 1981-12-30 | 1983-07-18 | ペ・セ・ユ−・カ・プロデユイ・シミク・ユ−ジヌ・ク−ルマン | 高純度アルミナの製造方法 |
JPH0251418A (ja) * | 1981-12-30 | 1990-02-21 | W R Grace & Co | 小粒径アルミナ楕円体粒子の製造方法 |
JPH0249247B2 (ja) * | 1981-12-30 | 1990-10-29 | Atochem | |
JPS58190823A (ja) * | 1982-04-26 | 1983-11-07 | Chiyoda Chem Eng & Constr Co Ltd | アルミナ担体の製造方法 |
JPH0116772B2 (ja) * | 1982-04-26 | 1989-03-27 | Chiyoda Chem Eng Construct Co | |
JPS6044054A (ja) * | 1983-07-27 | 1985-03-08 | ダブリユ−・ア−ル・グレイス・アンド・カンパニ− | 小ビ−ズ状の自動車廃ガス用触媒 |
JPS6340724A (ja) * | 1986-08-04 | 1988-02-22 | Kumamoto Pref Gov | 低ソ−ダアルミナ粉体の製造方法 |
JP4747353B2 (ja) * | 1998-07-06 | 2011-08-17 | アンスティテュ フランセ デュ ペトロール | 新規分散性水和アルミニウム、その調製方法および触媒の調製におけるその使用法 |
JP2002519297A (ja) * | 1998-07-06 | 2002-07-02 | アンスティテュ フランセ デュ ペトロール | 新規分散性水和アルミニウム、その調製方法および触媒の調製におけるその使用法 |
JP4639443B2 (ja) * | 1999-08-30 | 2011-02-23 | 住友化学株式会社 | ベーマイト及びそれを用いて形成してなる磁気記録媒体の下地層 |
JP2001139326A (ja) * | 1999-08-30 | 2001-05-22 | Sumitomo Chem Co Ltd | ベーマイト及びそれを用いて形成してなる磁気記録媒体の下地層 |
JP2009519203A (ja) * | 2005-12-12 | 2009-05-14 | ダブリュー・アール・グレース・アンド・カンパニー−コーン | アルミナ粒子及びその製造方法 |
JP2014500217A (ja) * | 2010-11-16 | 2014-01-09 | ロディア オペレーションズ | アルミナ触媒担体 |
JP2015500788A (ja) * | 2011-12-20 | 2015-01-08 | イエフペ エネルジ ヌヴェルIfp Energies Nouvelles | 回転楕円体状アルミナ粒子の製造方法 |
JP2015511884A (ja) * | 2012-02-17 | 2015-04-23 | アドバンスド・リフアイニング・テクノロジーズ・エルエルシー | 残油脱金属用回転楕円形触媒 |
US10279335B2 (en) | 2012-02-17 | 2019-05-07 | Advanced Refining Technologies Llc | Spheroidal resid hydrodemetallation catalyst |
US10584288B2 (en) | 2012-02-17 | 2020-03-10 | Advanced Refining Technologies Llc | Extruded resid demetallation catalyst |
US10589254B2 (en) | 2012-02-17 | 2020-03-17 | Advanced Refining Technologies Llc | Spheroidal resid hydrodemetallation catalyst |
JP2014097984A (ja) * | 2012-11-15 | 2014-05-29 | IFP Energies Nouvelles | Euoゼオライトおよび特定含有率のナトリウムをベースとする触媒の存在下での芳香族c8留分の異性化方法 |
JP2017521343A (ja) * | 2014-06-13 | 2017-08-03 | イエフペ エネルジ ヌヴェルIfp Energies Nouvelles | 高分散性ゲルおよびその調製方法 |
JP2020073429A (ja) * | 2014-06-13 | 2020-05-14 | イエフペ エネルジ ヌヴェルIfp Energies Nouvelles | 高分散性ゲルおよびその調製方法 |
KR20170039721A (ko) * | 2014-08-08 | 2017-04-11 | 사솔 퍼포먼스 케미컬스 게엠베하 | 침강 알루미나 및 제조방법 |
DE112021007314T5 (de) | 2021-03-19 | 2024-01-04 | Jgc Catalysts And Chemicals Ltd. | Siliciumdioxid-Aluminiumoxid-Pulver, Verfahren zur Herstellung von Siliciumdioxid-Aluminiumoxid-Pulver, Katalysator für Fluid Catalytic Cracking und Verfahren zu dessen Herstellung |
Also Published As
Publication number | Publication date |
---|---|
GB1603461A (en) | 1981-11-25 |
DE2812875C2 (ja) | 1989-08-31 |
FR2405900B1 (fr) | 1986-04-11 |
GB1603463A (en) | 1981-11-25 |
JPH0152328B2 (ja) | 1989-11-08 |
FR2405900A1 (fr) | 1979-05-11 |
FR2405899A1 (fr) | 1979-05-11 |
DE2858783C2 (ja) | 1992-02-06 |
FR2405899B1 (fr) | 1985-10-04 |
DE2812875A1 (de) | 1978-10-05 |
GB1603462A (en) | 1981-11-25 |
GB1603464A (en) | 1981-11-25 |
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