FR2332803A1 - Procede de production de catalyseurs d'(amm)oxydation a base de molybdene et de bismuth et nouveaux produits ainsi obtenus - Google Patents
Procede de production de catalyseurs d'(amm)oxydation a base de molybdene et de bismuth et nouveaux produits ainsi obtenusInfo
- Publication number
- FR2332803A1 FR2332803A1 FR7635834A FR7635834A FR2332803A1 FR 2332803 A1 FR2332803 A1 FR 2332803A1 FR 7635834 A FR7635834 A FR 7635834A FR 7635834 A FR7635834 A FR 7635834A FR 2332803 A1 FR2332803 A1 FR 2332803A1
- Authority
- FR
- France
- Prior art keywords
- molybdene
- catalyzers
- bismuth
- production
- new products
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/24—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons
- C07C253/26—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
-
- 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
- B01J23/84—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 arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8876—Arsenic, antimony or bismuth
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
- B01J27/19—Molybdenum
- B01J27/192—Molybdenum with bismuth
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
- C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
- C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
- C07C45/35—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in propene or isobutene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
- C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/636,011 US4040978A (en) | 1975-11-28 | 1975-11-28 | Production of (amm)oxidation catalyst |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2332803A1 true FR2332803A1 (fr) | 1977-06-24 |
FR2332803B1 FR2332803B1 (fr) | 1982-01-15 |
Family
ID=24550038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7635834A Granted FR2332803A1 (fr) | 1975-11-28 | 1976-11-26 | Procede de production de catalyseurs d'(amm)oxydation a base de molybdene et de bismuth et nouveaux produits ainsi obtenus |
Country Status (14)
Country | Link |
---|---|
US (1) | US4040978A (fr) |
JP (1) | JPS6029536B2 (fr) |
AU (1) | AU502608B2 (fr) |
BE (1) | BE848793A (fr) |
BR (1) | BR7607932A (fr) |
CA (1) | CA1082165A (fr) |
DE (1) | DE2653863A1 (fr) |
DK (1) | DK535276A (fr) |
ES (1) | ES453604A1 (fr) |
FR (1) | FR2332803A1 (fr) |
GB (1) | GB1564545A (fr) |
IL (1) | IL50998A (fr) |
IT (1) | IT1107704B (fr) |
NL (1) | NL7613086A (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2436135A1 (fr) * | 1978-09-13 | 1980-04-11 | Ube Industries | Procede pour la preparation catalytique de l'acrylonitrile |
FR2441423A1 (fr) * | 1978-11-13 | 1980-06-13 | Celanese Corp | Procede de preparation d'un catalyseur pour l'oxydation des olefines, catalyseur ainsi obtenu et procede d'oxydation des olefines en l'utilisant |
FR2502977A1 (fr) * | 1981-04-06 | 1982-10-08 | Euteco Impianti Spa | Catalyseur pour la conversion d'hydrocarbures insatures en diolefines ou/et en aldehydes et nitriles insatures, et procede pour la preparation de ce catalyseur |
FR2670685A1 (fr) * | 1990-12-20 | 1992-06-26 | Rhone Poulenc Chimie | Procede de preparation de catalyseurs enrobes a base de molybdates de bismuth et de fer dopes par du phosphore et du potassium. |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4168246A (en) * | 1975-11-28 | 1979-09-18 | Monsanto Company | Production of (amm)oxidation catalyst |
US4148757A (en) * | 1977-08-10 | 1979-04-10 | The Standard Oil Company | Process for forming multi-component oxide complex catalysts |
US4212766A (en) * | 1978-04-21 | 1980-07-15 | Standard Oil Company | Process for forming multi-component oxide complex catalysts |
DE2849715A1 (de) * | 1978-11-16 | 1980-05-29 | Hoechst Ag | Traegerkatalysator und verfahren zu seiner herstellung |
US4405498A (en) * | 1979-12-17 | 1983-09-20 | Monsanto Company | Oxidation and ammoxidation catalysts |
EP0061830B1 (fr) * | 1981-02-17 | 1984-08-29 | The Standard Oil Company | Préparation d'un catalyseur d'oxydation composite et son utilisation pour la préparation d'aldéhydes insaturées et d'acides à partir du propylène et de l'isobutylène |
US4415482A (en) * | 1981-11-12 | 1983-11-15 | Monsanto Company | Oxidation and ammoxidation catalyst |
JPH01131336U (fr) * | 1988-03-01 | 1989-09-06 | ||
JP2520279B2 (ja) * | 1988-03-03 | 1996-07-31 | 日東化学工業株式会社 | アクリロニトリルの製造方法 |
JP2520282B2 (ja) * | 1988-04-15 | 1996-07-31 | 日東化学工業株式会社 | アクリロニトリルの製造方法 |
FR2670686B1 (fr) * | 1990-12-20 | 1994-08-12 | Rhone Poulenc Chimie | Composition catalytique pour la preparation d'aldehydes alpha,beta-insatures par oxydation d'olefines en phase gazeuse et procede d'oxydation. |
DE19517106C2 (de) * | 1995-05-10 | 1997-11-06 | Doerfert Hans Joachim | Sicherheitssystem für mit gefährlichen Stoffen kontaminierte Luft für einen Arbeitsraum einer Abzugwerkbank |
US5840648A (en) | 1997-09-02 | 1998-11-24 | The Standard Oil Company | Catalyst for the manufacture of acrylonitrile and hydrogen cyanide |
US6017846A (en) * | 1999-01-11 | 2000-01-25 | Saudi Basic Industries Corporation | Highly active and selective catalysts for the production of unsaturated nitriles, methods of making and using the same |
US6037304A (en) * | 1999-01-11 | 2000-03-14 | Saudi Basic Industries Corporation | Highly active and selective catalysts for the production of unsaturated nitriles, methods of making and using the same |
US6486091B1 (en) | 2000-03-14 | 2002-11-26 | Saudi Basic Industries Corporation | Process for making highly active and selective catalysts for the production of unsaturated nitriles |
US7732367B2 (en) | 2005-07-25 | 2010-06-08 | Saudi Basic Industries Corporation | Catalyst for methacrolein oxidation and method for making and using same |
US7649112B2 (en) | 2005-07-25 | 2010-01-19 | Saudi Basic Industries Corporation | Integrated plant for producing 2-ethyl-hexanol and methacrylic acid and a method based thereon |
US7851397B2 (en) | 2005-07-25 | 2010-12-14 | Saudi Basic Industries Corporation | Catalyst for methacrolein oxidation and method for making and using same |
US7649111B2 (en) | 2005-07-25 | 2010-01-19 | Saudi Basic Industries Corporation | Catalyst for the oxidation of a mixed aldehyde feedstock to methacrylic acid and methods for making and using same |
KR101086731B1 (ko) * | 2008-10-17 | 2011-11-25 | 금호석유화학 주식회사 | 1-부텐의 산화/탈수소화 반응에서 1,3-부타디엔 제조용 비스무스 몰리브덴 철 복합 산화물 촉매 및 제조방법 |
US8258073B2 (en) * | 2010-03-23 | 2012-09-04 | Ineos Usa Llc | Process for preparing improved mixed metal oxide ammoxidation catalysts |
US8455388B2 (en) | 2010-03-23 | 2013-06-04 | Ineos Usa Llc | Attrition resistant mixed metal oxide ammoxidation catalysts |
US8153546B2 (en) | 2010-03-23 | 2012-04-10 | Ineos Usa Llc | Mixed metal oxide ammoxidation catalysts |
US8420566B2 (en) * | 2010-03-23 | 2013-04-16 | Ineos Usa Llc | High efficiency ammoxidation process and mixed metal oxide catalysts |
CN102892496B (zh) | 2010-03-23 | 2015-04-29 | 伊内奥斯美国公司 | 高效氨氧化方法和混合金属氧化物催化剂 |
US9433929B2 (en) | 2011-09-21 | 2016-09-06 | Ineos Europe Ag | Mixed metal oxide catalysts |
US8921257B2 (en) | 2011-12-02 | 2014-12-30 | Saudi Basic Industries Corporation | Dual function partial oxidation catalyst for propane to acrylic acid conversion |
DE102012010542A1 (de) | 2011-12-20 | 2013-06-20 | CCP Technology GmbH | Verfahren und anlage zur erzeugung von synthesegas |
US8722940B2 (en) | 2012-03-01 | 2014-05-13 | Saudi Basic Industries Corporation | High molybdenum mixed metal oxide catalysts for the production of unsaturated aldehydes from olefins |
EP3148691A1 (fr) | 2014-05-29 | 2017-04-05 | Ineos Europe AG | Catalyseurs améliorés d'ammoxydation sélective |
MX2016015443A (es) | 2014-05-29 | 2017-03-23 | Ineos Europe Ag | Catalizadores para amoxidacion selectiva mejorados. |
US9844769B2 (en) | 2014-12-17 | 2017-12-19 | Ineos Europe Ag | Mixed metal oxide ammoxidation catalysts |
WO2016153760A1 (fr) | 2015-03-23 | 2016-09-29 | Clariant Corporation | Matériau catalytique pour l'oxydation et l'ammoxydation du propylène et de l'isopropylène, procédé de préparation et d'utilisation de celui-ci |
JP6905531B2 (ja) | 2016-01-09 | 2021-07-21 | アセンド・パフォーマンス・マテリアルズ・オペレーションズ・リミテッド・ライアビリティ・カンパニーAscend Performance Materials Operations Llc | アクリロニトリル反応器供給物流れでのシアン化水素の直接生成のための触媒組成物および方法 |
US10626082B2 (en) | 2016-10-11 | 2020-04-21 | Ineos Europe Ag | Ammoxidation catalyst with selective co-product HCN production |
US10479760B2 (en) | 2017-02-08 | 2019-11-19 | Clariant Corporation | Synthetic methods for the preparation of propylene ammoxidation catalysts |
US10479759B2 (en) | 2017-02-08 | 2019-11-19 | Clariant Corporation | Synthetic methods for the preparation of propylene ammoxidation catalysts |
KR102605977B1 (ko) * | 2019-04-15 | 2023-11-23 | 아사히 가세이 가부시키가이샤 | 촉매, 촉매의 제조 방법, 아크릴로니트릴의 제조 방법 |
EP4205844A4 (fr) * | 2020-11-17 | 2024-03-27 | Lg Chem, Ltd. | Catalyseur d'ammoxydation, son procédé de production, et procédé de production d'acrylonitrile à l'aide du catalyseur d'ammoxydation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR79628E (fr) * | 1958-10-28 | 1962-12-28 | Montecatini Societa Gen Per L | Catalyseur pour la production de formaldéhyde à partir du méthanol |
FR1511572A (fr) * | 1965-08-25 | 1968-02-02 | Grace W R & Co | Oxydation des oléfines en acides carboxyliques à l'aide d'un catalyseur au molybdate de cobalt activé par du bismuth |
FR2233315A1 (fr) * | 1973-06-15 | 1975-01-10 | Standard Oil Co |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX81016A (fr) * | 1962-09-20 | |||
US3471556A (en) * | 1964-12-07 | 1969-10-07 | Nippon Kayaku Kk | Production of unsaturated aliphatic acids |
US3642930A (en) * | 1968-12-30 | 1972-02-15 | Standard Oil Co Ohio | Process for the manufacture of isoprene from isoamylenes and methyl butanols and catalyst therefor |
US3636066A (en) * | 1969-03-05 | 1972-01-18 | Ube Industries | Process for the manufacture of acrylonitrile by ammoxidation |
BE749305A (fr) * | 1969-05-02 | 1970-10-01 | Nippon Kayaku Kk | Catalyseur d'oxydation et son utilisation ( |
JPS4843096B1 (fr) * | 1970-01-31 | 1973-12-17 | ||
JPS529649B1 (fr) * | 1970-06-12 | 1977-03-17 | ||
US3746657A (en) * | 1971-06-28 | 1973-07-17 | Standard Oil Co | Catalyst manufacturing process |
-
1975
- 1975-11-28 US US05/636,011 patent/US4040978A/en not_active Expired - Lifetime
-
1976
- 1976-11-24 ES ES453604A patent/ES453604A1/es not_active Expired
- 1976-11-24 NL NL7613086A patent/NL7613086A/xx not_active Application Discontinuation
- 1976-11-26 BR BR7607932A patent/BR7607932A/pt unknown
- 1976-11-26 FR FR7635834A patent/FR2332803A1/fr active Granted
- 1976-11-26 IL IL50998A patent/IL50998A/xx unknown
- 1976-11-26 BE BE172739A patent/BE848793A/fr not_active IP Right Cessation
- 1976-11-26 DK DK535276A patent/DK535276A/da not_active Application Discontinuation
- 1976-11-26 JP JP51142836A patent/JPS6029536B2/ja not_active Expired
- 1976-11-26 GB GB49423/76A patent/GB1564545A/en not_active Expired
- 1976-11-26 DE DE19762653863 patent/DE2653863A1/de active Granted
- 1976-11-26 IT IT29851/76A patent/IT1107704B/it active
- 1976-11-26 CA CA266,654A patent/CA1082165A/fr not_active Expired
- 1976-11-26 AU AU20026/76A patent/AU502608B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR79628E (fr) * | 1958-10-28 | 1962-12-28 | Montecatini Societa Gen Per L | Catalyseur pour la production de formaldéhyde à partir du méthanol |
FR1511572A (fr) * | 1965-08-25 | 1968-02-02 | Grace W R & Co | Oxydation des oléfines en acides carboxyliques à l'aide d'un catalyseur au molybdate de cobalt activé par du bismuth |
FR2233315A1 (fr) * | 1973-06-15 | 1975-01-10 | Standard Oil Co |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2436135A1 (fr) * | 1978-09-13 | 1980-04-11 | Ube Industries | Procede pour la preparation catalytique de l'acrylonitrile |
FR2441423A1 (fr) * | 1978-11-13 | 1980-06-13 | Celanese Corp | Procede de preparation d'un catalyseur pour l'oxydation des olefines, catalyseur ainsi obtenu et procede d'oxydation des olefines en l'utilisant |
FR2502977A1 (fr) * | 1981-04-06 | 1982-10-08 | Euteco Impianti Spa | Catalyseur pour la conversion d'hydrocarbures insatures en diolefines ou/et en aldehydes et nitriles insatures, et procede pour la preparation de ce catalyseur |
FR2670685A1 (fr) * | 1990-12-20 | 1992-06-26 | Rhone Poulenc Chimie | Procede de preparation de catalyseurs enrobes a base de molybdates de bismuth et de fer dopes par du phosphore et du potassium. |
EP0493275A1 (fr) * | 1990-12-20 | 1992-07-01 | Rhone-Poulenc Chimie | Procédé de préparation de catalyseurs enrobés à base de molybdates de bismuth et de fer dopés par du phosphore et du potassium |
Also Published As
Publication number | Publication date |
---|---|
JPS5268094A (en) | 1977-06-06 |
ES453604A1 (es) | 1977-11-16 |
AU2002676A (en) | 1978-06-01 |
JPS6029536B2 (ja) | 1985-07-11 |
NL7613086A (nl) | 1977-06-01 |
IL50998A (en) | 1980-10-26 |
FR2332803B1 (fr) | 1982-01-15 |
DK535276A (da) | 1977-05-29 |
IL50998A0 (en) | 1977-01-31 |
CA1082165A (fr) | 1980-07-22 |
DE2653863C2 (fr) | 1988-10-20 |
US4040978A (en) | 1977-08-09 |
BR7607932A (pt) | 1977-11-08 |
AU502608B2 (en) | 1979-08-02 |
DE2653863A1 (de) | 1977-06-08 |
IT1107704B (it) | 1985-11-25 |
GB1564545A (en) | 1980-04-10 |
BE848793A (fr) | 1977-05-26 |
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