MX152369A - Procedimiento mejorado para la desmetalizacion y desulfuracion de hidrocarburos pesados - Google Patents
Procedimiento mejorado para la desmetalizacion y desulfuracion de hidrocarburos pesadosInfo
- Publication number
- MX152369A MX152369A MX178339A MX17833979A MX152369A MX 152369 A MX152369 A MX 152369A MX 178339 A MX178339 A MX 178339A MX 17833979 A MX17833979 A MX 17833979A MX 152369 A MX152369 A MX 152369A
- Authority
- MX
- Mexico
- Prior art keywords
- demetalization
- desulfuration
- heavy oil
- improved procedure
- procedure
- Prior art date
Links
- 238000006477 desulfuration reaction Methods 0.000 title 1
- 239000000295 fuel oil Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
-
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/28—Molybdenum
-
- 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
- B01J35/633—Pore volume less than 0.5 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
- B01J35/635—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
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
-
- 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
- B01J35/66—Pore distribution
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/107—Atmospheric residues having a boiling point of at least about 538 °C
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/928,141 US4212729A (en) | 1978-07-26 | 1978-07-26 | Process for demetallation and desulfurization of heavy hydrocarbons |
Publications (1)
Publication Number | Publication Date |
---|---|
MX152369A true MX152369A (es) | 1985-07-09 |
Family
ID=25455792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX178339A MX152369A (es) | 1978-07-26 | 1979-07-04 | Procedimiento mejorado para la desmetalizacion y desulfuracion de hidrocarburos pesados |
Country Status (12)
Country | Link |
---|---|
US (1) | US4212729A (es) |
JP (1) | JPS5518499A (es) |
AU (1) | AU528419B2 (es) |
CA (1) | CA1132078A (es) |
DD (1) | DD145541A5 (es) |
DE (1) | DE2930357A1 (es) |
FR (1) | FR2433569A1 (es) |
GB (1) | GB2026533B (es) |
IT (1) | IT1118127B (es) |
MX (1) | MX152369A (es) |
NL (1) | NL7905785A (es) |
PL (1) | PL117377B1 (es) |
Families Citing this family (68)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS601056B2 (ja) * | 1980-02-19 | 1985-01-11 | 千代田化工建設株式会社 | アスファルテンを含む重質炭化水素油の水素化処理 |
US4301037A (en) * | 1980-04-01 | 1981-11-17 | W. R. Grace & Co. | Extruded alumina catalyst support having controlled distribution of pore sizes |
CA1182769A (en) * | 1980-04-10 | 1985-02-19 | Ronald S. Tolberg | Two-bed catalytic hydroprocessing for heavy hydrocarbon feedstocks |
US4421633A (en) * | 1981-03-13 | 1983-12-20 | Mobil Oil Corporation | Low pressure cyclic hydrocracking process using multi-catalyst bed reactor for heavy liquids |
CA1195278A (en) * | 1981-09-28 | 1985-10-15 | Chevron Research And Technology Company | Layered residua treatment catalyst process and temperature profile |
US4431525A (en) * | 1982-04-26 | 1984-02-14 | Standard Oil Company (Indiana) | Three-catalyst process for the hydrotreating of heavy hydrocarbon streams |
US4431526A (en) * | 1982-07-06 | 1984-02-14 | Union Oil Company Of California | Multiple-stage hydroprocessing of hydrocarbon oil |
AU571189B2 (en) * | 1982-12-06 | 1988-04-14 | Amoco Corporation | Hydrotreating catalyst |
US4886594A (en) * | 1982-12-06 | 1989-12-12 | Amoco Corporation | Hydrotreating catalyst and process |
JPS59109589A (ja) * | 1982-12-16 | 1984-06-25 | Kobe Steel Ltd | 石炭の液化方法 |
FR2538811A1 (fr) * | 1982-12-30 | 1984-07-06 | Inst Francais Du Petrole | Procede de traitement d'une huile lourde ou d'une fraction d'huile lourde pour les convertir en fractions plus legeres |
FR2538814B1 (fr) * | 1982-12-30 | 1986-06-27 | Inst Francais Du Petrole | Procede de traitement d'une huile lourde ou d'une fraction d'huile lourde pour les convertir en fractions plus legeres |
FR2538813A1 (fr) * | 1982-12-31 | 1984-07-06 | Inst Francais Du Petrole | Procede d'hydrotraitement convertissant en au moins deux etapes une fraction lourde d'hydrocarbures contenant des impuretes soufrees et des impuretes metalliques |
US4585546A (en) * | 1983-04-29 | 1986-04-29 | Mobil Oil Corporation | Hydrotreating petroleum heavy ends in aromatic solvents with large pore size alumina |
US4548709A (en) * | 1983-04-29 | 1985-10-22 | Mobil Oil Corporation | Hydrotreating petroleum heavy ends in aromatic solvents with dual pore size distribution alumina catalyst |
US4715948A (en) * | 1983-07-06 | 1987-12-29 | Phillips Petroleum Company | Improving the life of a catalyst used to process hydrocarbon containing feed streams |
US4564441A (en) * | 1983-08-05 | 1986-01-14 | Phillips Petroleum Company | Hydrofining process for hydrocarbon-containing feed streams |
US4617110A (en) * | 1984-06-11 | 1986-10-14 | Phillips Petroleum Company | Control of a hydrofining process for hydrocarbon-containing feed streams which process employs a hydrodemetallization reactor in series with a hydrodesulfurization reactor |
US4564439A (en) * | 1984-06-29 | 1986-01-14 | Chevron Research Company | Two-stage, close-coupled thermal catalytic hydroconversion process |
AU576083B2 (en) * | 1984-06-29 | 1988-08-11 | Chevron Research Company | Two-stage, close-coupled thermal catalytic hydroconversion process |
US4657663A (en) * | 1985-04-24 | 1987-04-14 | Phillips Petroleum Company | Hydrotreating process employing a three-stage catalyst system wherein a titanium compound is employed in the second stage |
US4752376A (en) * | 1985-09-25 | 1988-06-21 | Intevep, S.A. | Multiple stepped process for the demetallization and desulfuration of heavy oil feedstocks |
US4657664A (en) * | 1985-12-20 | 1987-04-14 | Amoco Corporation | Process for demetallation and desulfurization of heavy hydrocarbons |
US4729826A (en) * | 1986-02-28 | 1988-03-08 | Union Oil Company Of California | Temperature controlled catalytic demetallization of hydrocarbons |
US4816139A (en) * | 1986-06-27 | 1989-03-28 | Tenneco Oil Company | Method for removing sulfur compounds from C6 and lower alkanes |
US4778587A (en) * | 1987-05-20 | 1988-10-18 | Phillips Petroleum Company | Hydrotreating process employing a pretreated alumina containing material |
US4814315A (en) * | 1987-05-20 | 1989-03-21 | Phillips Petroleum Company | Pretreated alumina containing material and process for its preparation |
JPH03117956A (ja) * | 1989-09-30 | 1991-05-20 | Anritsu Corp | 料金処理装置付コードレス電話機 |
JP2567291B2 (ja) * | 1990-03-28 | 1996-12-25 | 株式会社コスモ総合研究所 | 炭化水素油の水素化処理方法 |
US5851381A (en) * | 1990-12-07 | 1998-12-22 | Idemitsu Kosan Co., Ltd. | Method of refining crude oil |
WO1992010557A1 (en) * | 1990-12-07 | 1992-06-25 | Idemitsu Kosan Co., Ltd. | Method of refining crude oil |
JPH04267642A (ja) * | 1991-02-22 | 1992-09-24 | Fujitsu Ltd | データ回線不良警報回路 |
US5397456A (en) * | 1993-02-19 | 1995-03-14 | Texaco Inc. | Hydroconversion process employing catalyst with specified pore size distribution |
US5322829A (en) * | 1993-03-15 | 1994-06-21 | Amoco Corporation | Resid hydrotreating catalyst and process |
JP2958234B2 (ja) * | 1994-02-19 | 1999-10-06 | 株式会社コスモ総合研究所 | 重質炭化水素油の水素化処理方法 |
JP3802106B2 (ja) | 1995-06-08 | 2006-07-26 | 日本ケッチェン株式会社 | 炭化水素油の水素化処理触媒とその製造方法およびその活性化方法 |
ZA989153B (en) | 1997-10-15 | 1999-05-10 | Equistar Chem Lp | Method of producing olefins and feedstocks for use in olefin production from petroleum residua which have low pentane insolubles and high hydrogen content |
US6036844A (en) * | 1998-05-06 | 2000-03-14 | Exxon Research And Engineering Co. | Three stage hydroprocessing including a vapor stage |
US6224749B1 (en) * | 1998-05-06 | 2001-05-01 | Exxon Research And Engineering Company | Liquid and vapor stage hydroprocessing using once-through hydrogen |
US6554994B1 (en) * | 1999-04-13 | 2003-04-29 | Chevron U.S.A. Inc. | Upflow reactor system with layered catalyst bed for hydrotreating heavy feedstocks |
US7534342B2 (en) | 2003-12-19 | 2009-05-19 | Shell Oil Company | Systems, methods, and catalysts for producing a crude product |
NL1027775C2 (nl) * | 2003-12-19 | 2008-06-10 | Shell Int Research | Systemen en werkwijzen voor het bereiden van een ruw product. |
US20070012595A1 (en) * | 2003-12-19 | 2007-01-18 | Brownscombe Thomas F | Methods for producing a total product in the presence of sulfur |
CN1894377A (zh) * | 2003-12-19 | 2007-01-10 | 国际壳牌研究有限公司 | 生产原油产品的系统,方法和催化剂 |
US7745369B2 (en) | 2003-12-19 | 2010-06-29 | Shell Oil Company | Method and catalyst for producing a crude product with minimal hydrogen uptake |
US7416653B2 (en) | 2003-12-19 | 2008-08-26 | Shell Oil Company | Systems and methods of producing a crude product |
US20100098602A1 (en) * | 2003-12-19 | 2010-04-22 | Opinder Kishan Bhan | Systems, methods, and catalysts for producing a crude product |
US20060289340A1 (en) * | 2003-12-19 | 2006-12-28 | Brownscombe Thomas F | Methods for producing a total product in the presence of sulfur |
WO2006070007A1 (en) * | 2004-12-31 | 2006-07-06 | Shell Internationale Research Maatschappij B.V. | Hydrogenation catalyst and use thereof for hydrogenating fischer-tropsch endproducts |
CN101166807A (zh) * | 2005-04-11 | 2008-04-23 | 国际壳牌研究有限公司 | 生产原油产品的系统、方法和催化剂 |
BRPI0610670B1 (pt) | 2005-04-11 | 2016-01-19 | Shell Int Research | método para produzir um produto bruto, catalisador para produzir um produto bruto, e, método para fabricar um catalisador |
CA2604006A1 (en) | 2005-04-11 | 2006-10-19 | Shell International Research Maatschappij B.V. | Method and catalyst for producing a crude product having a reduced nitroge content |
WO2007082589A1 (en) * | 2006-01-23 | 2007-07-26 | Shell Internationale Research Maatschappij B.V. | Hydrogenation catalyst and use thereof for hdrogenating fischer-tropsch endproducts |
WO2009073436A2 (en) | 2007-11-28 | 2009-06-11 | Saudi Arabian Oil Company | Process for catalytic hydrotreating of sour crude oils |
KR20110018875A (ko) * | 2008-04-10 | 2011-02-24 | 셀 인터나쵸나아레 레사아치 마아츠샤피 비이부이 | 촉매 시스템 및 이 촉매 시스템으로 미정제 공급물을 변환시키는 방법 |
US8372267B2 (en) | 2008-07-14 | 2013-02-12 | Saudi Arabian Oil Company | Process for the sequential hydroconversion and hydrodesulfurization of whole crude oil |
US9260671B2 (en) | 2008-07-14 | 2016-02-16 | Saudi Arabian Oil Company | Process for the treatment of heavy oils using light hydrocarbon components as a diluent |
MX2008011121A (es) | 2008-08-29 | 2010-03-01 | Mexicano Inst Petrol | Liquidos ionicos libres de halogenos en la desulfuracion de naftas y su recuperacion. |
EP2445997B1 (en) | 2009-06-22 | 2021-03-24 | Saudi Arabian Oil Company | Demetalizing and desulfurizing virgin crude oil for delayed coking |
TWI534258B (zh) * | 2010-10-13 | 2016-05-21 | China Petrochemical Technology Co Ltd | Method for Hydrogenation of Rinsing Bed with Heavy Material |
US8608940B2 (en) | 2011-03-31 | 2013-12-17 | Uop Llc | Process for mild hydrocracking |
US8747653B2 (en) | 2011-03-31 | 2014-06-10 | Uop Llc | Process for hydroprocessing two streams |
US8696885B2 (en) | 2011-03-31 | 2014-04-15 | Uop Llc | Process for producing diesel |
US8753501B2 (en) | 2011-10-21 | 2014-06-17 | Uop Llc | Process and apparatus for producing diesel |
US8158070B1 (en) | 2011-03-31 | 2012-04-17 | Uop Llc | Apparatus for hydroprocessing two streams |
US8158069B1 (en) | 2011-03-31 | 2012-04-17 | Uop Llc | Apparatus for mild hydrocracking |
US8518351B2 (en) | 2011-03-31 | 2013-08-27 | Uop Llc | Apparatus for producing diesel |
US8475745B2 (en) | 2011-05-17 | 2013-07-02 | Uop Llc | Apparatus for hydroprocessing hydrocarbons |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1027016A (fr) * | 1950-07-21 | 1953-05-06 | Procédé pour la désulfuration d'huiles d'hydrocarbures, et catalyseur correspondant | |
US3180820A (en) * | 1962-08-15 | 1965-04-27 | Universal Oil Prod Co | Dual zone hydrorefining process |
US3803027A (en) * | 1970-07-20 | 1974-04-09 | Gulf Research Development Co | Process for conversion of residual oils |
US3730879A (en) * | 1970-11-19 | 1973-05-01 | Gulf Research Development Co | Two-bed catalyst arrangement for hydrodesulrurization of crude oil |
US3714032A (en) * | 1970-11-25 | 1973-01-30 | Standard Oil Co | Process for treating a high-boiling petroleum hydrocarbon feedstock |
US4113661A (en) * | 1973-08-09 | 1978-09-12 | Chevron Research Company | Method for preparing a hydrodesulfurization catalyst |
US3898155A (en) * | 1973-12-19 | 1975-08-05 | Gulf Research Development Co | Heavy oil demetallization and desulfurization process |
US4014821A (en) * | 1974-02-07 | 1977-03-29 | Exxon Research And Engineering Company | Heavy crude conversion catalyst |
US3977961A (en) * | 1974-02-07 | 1976-08-31 | Exxon Research And Engineering Company | Heavy crude conversion |
US3985684A (en) * | 1974-02-07 | 1976-10-12 | Exxon Research And Engineering Company | Heavy crude conversion |
JPS5115046A (ja) * | 1974-07-26 | 1976-02-06 | Toyoda Automatic Loom Works | Kyuchakukanenbosekisochino sokosukuriin |
US4016067A (en) * | 1975-02-21 | 1977-04-05 | Mobil Oil Corporation | Process for demetalation and desulfurization of petroleum oils |
US4054508A (en) * | 1975-02-21 | 1977-10-18 | Mobil Oil Corporation | Demetalation and desulfurization of residual oil utilizing hydrogen and trickle beds of catalysts in three zones |
US3980552A (en) * | 1975-05-05 | 1976-09-14 | Union Oil Company Of California | Hydrodesulfurization of residual petroleum oil with a sulfided cobalt-molybdenum-alumina catalyst |
US4048060A (en) * | 1975-12-29 | 1977-09-13 | Exxon Research And Engineering Company | Two-stage hydrodesulfurization of oil utilizing a narrow pore size distribution catalyst |
US4013547A (en) * | 1976-01-22 | 1977-03-22 | Union Oil Company Of California | Desulfurization of residual petroleum oils with a catalyst calcined at higher temperatures |
US4073718A (en) * | 1976-05-12 | 1978-02-14 | Exxon Research & Engineering Co. | Process for the hydroconversion and hydrodesulfurization of heavy feeds and residua |
US4051021A (en) * | 1976-05-12 | 1977-09-27 | Exxon Research & Engineering Co. | Hydrodesulfurization of hydrocarbon feed utilizing a silica stabilized alumina composite catalyst |
US4119531A (en) * | 1977-06-30 | 1978-10-10 | Standard Oil Company (Indiana) | Large-pore hydrodemetallization catalyst and process employing same |
-
1978
- 1978-07-26 US US05/928,141 patent/US4212729A/en not_active Expired - Lifetime
-
1979
- 1979-06-29 CA CA330,830A patent/CA1132078A/en not_active Expired
- 1979-07-03 GB GB7923187A patent/GB2026533B/en not_active Expired
- 1979-07-03 AU AU48618/79A patent/AU528419B2/en not_active Ceased
- 1979-07-04 MX MX178339A patent/MX152369A/es unknown
- 1979-07-19 IT IT49810/79A patent/IT1118127B/it active
- 1979-07-25 JP JP9485779A patent/JPS5518499A/ja active Granted
- 1979-07-25 PL PL1979217385A patent/PL117377B1/pl unknown
- 1979-07-26 NL NL7905785A patent/NL7905785A/nl not_active Application Discontinuation
- 1979-07-26 DE DE19792930357 patent/DE2930357A1/de active Granted
- 1979-07-26 DD DD79214639A patent/DD145541A5/de unknown
- 1979-07-26 FR FR7919364A patent/FR2433569A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
GB2026533A (en) | 1980-02-06 |
CA1132078A (en) | 1982-09-21 |
US4212729A (en) | 1980-07-15 |
DE2930357A1 (de) | 1980-02-07 |
FR2433569A1 (fr) | 1980-03-14 |
PL217385A1 (es) | 1980-06-02 |
FR2433569B1 (es) | 1984-11-16 |
JPS6326157B2 (es) | 1988-05-28 |
DE2930357C2 (es) | 1988-08-04 |
AU528419B2 (en) | 1983-04-28 |
IT1118127B (it) | 1986-02-24 |
AU4861879A (en) | 1980-01-31 |
DD145541A5 (de) | 1980-12-17 |
JPS5518499A (en) | 1980-02-08 |
GB2026533B (en) | 1983-03-23 |
NL7905785A (nl) | 1980-01-29 |
IT7949810A0 (it) | 1979-07-19 |
PL117377B1 (en) | 1981-07-31 |
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