WO1991012224A3 - Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol - Google Patents
Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol Download PDFInfo
- Publication number
- WO1991012224A3 WO1991012224A3 PCT/US1991/000937 US9100937W WO9112224A3 WO 1991012224 A3 WO1991012224 A3 WO 1991012224A3 US 9100937 W US9100937 W US 9100937W WO 9112224 A3 WO9112224 A3 WO 9112224A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light hydrocarbons
- gasoline
- methanol
- olefins
- cofeed
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
- C07C29/1516—Multisteps
- C07C29/1518—Multisteps one step being the formation of initial mixture of carbon oxides and hydrogen for synthesis
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1845—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with particles moving upwards while fluidised
- B01J8/1863—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with particles moving upwards while fluidised followed by a downward movement outside the reactor and subsequently re-entering it
-
- 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
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/38—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it
- B01J8/384—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only
- B01J8/388—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed containing a rotatable device or being subject to rotation or to a circulatory movement, i.e. leaving a vessel and subsequently re-entering it being subject to a circulatory movement only externally, i.e. the particles leaving the vessel and subsequently re-entering it
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
- C07C2/82—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling
- C07C2/84—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
- C07C29/152—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases characterised by the reactor used
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
- C10L1/06—Liquid carbonaceous fuels essentially based on blends of hydrocarbons for spark ignition
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the alkali- or alkaline earth metals or beryllium
- C07C2523/04—Alkali metals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- C07C2523/32—Manganese, technetium or rhenium
- C07C2523/34—Manganese
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S585/00—Chemistry of hydrocarbon compounds
- Y10S585/929—Special chemical considerations
- Y10S585/943—Synthesis from methane or inorganic carbon source, e.g. coal
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91904659A EP0515500A1 (fr) | 1990-02-12 | 1991-02-12 | Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol |
| PCT/US1991/000937 WO1991012224A2 (fr) | 1990-02-12 | 1991-02-12 | Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol |
| CA002075891A CA2075891A1 (fr) | 1990-02-12 | 1991-02-12 | Reacteur de transformation a lit circulant et alimentation mixte et methode de transformation d'hydrocarbures legers en olefines, essence et methanol |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US479,086 | 1990-02-12 | ||
| US07/479,086 US5026934A (en) | 1990-02-12 | 1990-02-12 | Method for converting light hydrocarbons to olefins, gasoline and methanol |
| US53191090A | 1990-06-01 | 1990-06-01 | |
| US531,910 | 1990-06-01 | ||
| PCT/US1991/000937 WO1991012224A2 (fr) | 1990-02-12 | 1991-02-12 | Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol |
| CN91101783.6A CN1064474A (zh) | 1990-02-12 | 1991-02-25 | 轻质烃转化成烯烃、汽油和甲醇的方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1991012224A2 WO1991012224A2 (fr) | 1991-08-22 |
| WO1991012224A3 true WO1991012224A3 (fr) | 1992-04-02 |
Family
ID=36764652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1991/000937 Ceased WO1991012224A2 (fr) | 1990-02-12 | 1991-02-12 | Reacteur a conversion a lit circulant et a charge d'alimentation double et procede pour convertir des hydrocarbures legers en olefines, essence et methanol |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5026934A (fr) |
| EP (1) | EP0515500A1 (fr) |
| CN (1) | CN1064474A (fr) |
| CA (1) | CA2075891A1 (fr) |
| NZ (1) | NZ237096A (fr) |
| WO (1) | WO1991012224A2 (fr) |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2925963B2 (ja) * | 1994-12-05 | 1999-07-28 | 石油公団 | メタンの酸化カップリング方法とその装置 |
| US6201029B1 (en) | 1996-02-13 | 2001-03-13 | Marathon Oil Company | Staged combustion of a low heating value fuel gas for driving a gas turbine |
| US5733941A (en) * | 1996-02-13 | 1998-03-31 | Marathon Oil Company | Hydrocarbon gas conversion system and process for producing a synthetic hydrocarbon liquid |
| US5861441A (en) * | 1996-02-13 | 1999-01-19 | Marathon Oil Company | Combusting a hydrocarbon gas to produce a reformed gas |
| US6313361B1 (en) | 1996-02-13 | 2001-11-06 | Marathon Oil Company | Formation of a stable wax slurry from a Fischer-Tropsch reactor effluent |
| US6130259A (en) * | 1996-02-13 | 2000-10-10 | Marathon Oil Company | Hydrocarbon gas conversion system and process for producing a synthetic hydrocarbon liquid |
| EP0909258A1 (fr) * | 1996-06-21 | 1999-04-21 | Syntroleum Corporation | Systeme et methode de production de gaz de synthese |
| PE17599A1 (es) | 1996-07-09 | 1999-02-22 | Syntroleum Corp | Procedimiento para convertir gases a liquidos |
| US5950732A (en) * | 1997-04-02 | 1999-09-14 | Syntroleum Corporation | System and method for hydrate recovery |
| US6011073A (en) * | 1997-10-10 | 2000-01-04 | Syntroleum Corporation | System and method for converting light hydrocarbons to heavier hydrocarbons with separation of water into oxygen and hydrogen |
| US6096934A (en) * | 1998-12-09 | 2000-08-01 | Uop Llc | Oxidative coupling of methane with carbon conservation |
| US7838708B2 (en) | 2001-06-20 | 2010-11-23 | Grt, Inc. | Hydrocarbon conversion process improvements |
| US6794417B2 (en) | 2002-06-19 | 2004-09-21 | Syntroleum Corporation | System and method for treatment of water and disposal of contaminants produced by converting lighter hydrocarbons into heavier hydrocarbon |
| US7161051B2 (en) * | 2002-12-30 | 2007-01-09 | Exxonmobil Chemical Patents Inc. | Integration of a methanol synthesis system with a methanol to olefin reaction system |
| US7151198B2 (en) * | 2002-12-30 | 2006-12-19 | Exxonmobil Chemical Patents Inc. | Integration of a methanol synthesis system with a methanol to olefin reaction system |
| MXPA06000470A (es) | 2003-07-15 | 2006-08-23 | Grt Inc | Sintesis de hidrocarburos. |
| US20050171393A1 (en) | 2003-07-15 | 2005-08-04 | Lorkovic Ivan M. | Hydrocarbon synthesis |
| US20080275284A1 (en) | 2004-04-16 | 2008-11-06 | Marathon Oil Company | Process for converting gaseous alkanes to liquid hydrocarbons |
| US8642822B2 (en) | 2004-04-16 | 2014-02-04 | Marathon Gtf Technology, Ltd. | Processes for converting gaseous alkanes to liquid hydrocarbons using microchannel reactor |
| US20060100469A1 (en) | 2004-04-16 | 2006-05-11 | Waycuilis John J | Process for converting gaseous alkanes to olefins and liquid hydrocarbons |
| US7244867B2 (en) | 2004-04-16 | 2007-07-17 | Marathon Oil Company | Process for converting gaseous alkanes to liquid hydrocarbons |
| US7674941B2 (en) | 2004-04-16 | 2010-03-09 | Marathon Gtf Technology, Ltd. | Processes for converting gaseous alkanes to liquid hydrocarbons |
| US8173851B2 (en) | 2004-04-16 | 2012-05-08 | Marathon Gtf Technology, Ltd. | Processes for converting gaseous alkanes to liquid hydrocarbons |
| US7579510B2 (en) | 2006-02-03 | 2009-08-25 | Grt, Inc. | Continuous process for converting natural gas to liquid hydrocarbons |
| SG187456A1 (en) | 2006-02-03 | 2013-02-28 | Grt Inc | Separation of light gases from halogens |
| JP2010528054A (ja) | 2007-05-24 | 2010-08-19 | ジーアールティー インコーポレイテッド | 可逆的なハロゲン化水素の捕捉及び放出を組み込んだ領域反応器 |
| US7989507B2 (en) * | 2008-05-20 | 2011-08-02 | Siemens Aktiengesellschaft | Production of fuel materials utilizing waste carbon dioxide and hydrogen from renewable resources |
| US8282810B2 (en) | 2008-06-13 | 2012-10-09 | Marathon Gtf Technology, Ltd. | Bromine-based method and system for converting gaseous alkanes to liquid hydrocarbons using electrolysis for bromine recovery |
| AU2009270801B2 (en) | 2008-07-18 | 2014-04-24 | Reaction 35, Llc | Continuous process for converting natural gas to liquid hydrocarbons |
| CN102639676B (zh) * | 2009-11-10 | 2015-05-27 | 国际壳牌研究有限公司 | 用于生产烯烃的方法 |
| US8367884B2 (en) | 2010-03-02 | 2013-02-05 | Marathon Gtf Technology, Ltd. | Processes and systems for the staged synthesis of alkyl bromides |
| US8198495B2 (en) | 2010-03-02 | 2012-06-12 | Marathon Gtf Technology, Ltd. | Processes and systems for the staged synthesis of alkyl bromides |
| US8815050B2 (en) | 2011-03-22 | 2014-08-26 | Marathon Gtf Technology, Ltd. | Processes and systems for drying liquid bromine |
| US8436220B2 (en) | 2011-06-10 | 2013-05-07 | Marathon Gtf Technology, Ltd. | Processes and systems for demethanization of brominated hydrocarbons |
| US8829256B2 (en) | 2011-06-30 | 2014-09-09 | Gtc Technology Us, Llc | Processes and systems for fractionation of brominated hydrocarbons in the conversion of natural gas to liquid hydrocarbons |
| US8802908B2 (en) | 2011-10-21 | 2014-08-12 | Marathon Gtf Technology, Ltd. | Processes and systems for separate, parallel methane and higher alkanes' bromination |
| US9193641B2 (en) | 2011-12-16 | 2015-11-24 | Gtc Technology Us, Llc | Processes and systems for conversion of alkyl bromides to higher molecular weight hydrocarbons in circulating catalyst reactor-regenerator systems |
| WO2015081122A2 (fr) | 2013-11-27 | 2015-06-04 | Siluria Technologies, Inc. | Réacteurs et systèmes destinés au couplage oxydatif du méthane |
| CA2935937A1 (fr) * | 2014-01-08 | 2015-07-16 | Siluria Technologies, Inc. | Systemes et procedes de conversion d'ethylene en liquides |
| US10793490B2 (en) | 2015-03-17 | 2020-10-06 | Lummus Technology Llc | Oxidative coupling of methane methods and systems |
| ES2833079T3 (es) * | 2015-03-17 | 2021-06-14 | Lummus Technology Inc | Acoplamiento oxidativo de métodos y sistemas de metano |
| WO2017180910A1 (fr) | 2016-04-13 | 2017-10-19 | Siluria Technologies, Inc. | Couplage oxydant de méthane pour la production d'oléfines |
| US10870810B2 (en) | 2017-07-20 | 2020-12-22 | Proteum Energy, Llc | Method and system for converting associated gas |
| WO2023034253A1 (fr) | 2021-08-31 | 2023-03-09 | Lummus Technology Llc | Procédés et systèmes pour la mise en œuvre du couplage oxydatif du méthane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604479A (en) * | 1949-08-05 | 1952-07-22 | Standard Oil Dev Co | Selective oxidation with suspended catalyst |
| US3041273A (en) * | 1953-09-09 | 1962-06-26 | Sinclair Research Inc | Process for the conversion of hydrocarbons with the use of an expanding transfer line reactor |
| US4788372A (en) * | 1987-02-13 | 1988-11-29 | Atlantic Richfield Company | Methane conversion process |
| US4795849A (en) * | 1987-08-04 | 1989-01-03 | Atlantic Richfield Company | Methane conversion process |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894102A (en) * | 1973-08-09 | 1975-07-08 | Mobil Oil Corp | Conversion of synthesis gas to gasoline |
| US3894107A (en) * | 1973-08-09 | 1975-07-08 | Mobil Oil Corp | Conversion of alcohols, mercaptans, sulfides, halides and/or amines |
| US3931349A (en) * | 1974-09-23 | 1976-01-06 | Mobil Oil Corporation | Conversion of methanol to gasoline components |
| US3969426A (en) * | 1974-10-17 | 1976-07-13 | Mobil Oil Corporation | Conversion of methanol to products comprising gasoline boiling components |
| US4035430A (en) * | 1976-07-26 | 1977-07-12 | Mobil Oil Corporation | Conversion of methanol to gasoline product |
| US4544784A (en) * | 1982-08-30 | 1985-10-01 | Atlantic Richfield Company | Methane conversion |
| US4665260A (en) * | 1982-08-30 | 1987-05-12 | Atlantic Richfield Company | Methane conversion |
| US4567307A (en) * | 1982-08-30 | 1986-01-28 | Atlantic Richfield Company | Two-step methane conversion process |
| US4560821A (en) * | 1982-08-30 | 1985-12-24 | Atlantic Richfield Company | Methane conversion |
| US4499322A (en) * | 1983-08-12 | 1985-02-12 | Atlantic Richfield Company | Methane conversion |
| US4777313A (en) * | 1983-08-12 | 1988-10-11 | Atlantic Richfield Company | Boron-promoted reducible metal oxides and methods of their use |
| US4634800A (en) * | 1984-04-16 | 1987-01-06 | Atlantic Richfield Company | Methane conversion process |
| US4926006A (en) * | 1985-11-01 | 1990-05-15 | Director General Of Agency Of Industrial Science And Technology | Aluminoborosilicate containing alkaline earth metal, a method for the preparation thereof and a method for the catalytic preparation of a lower olefin therewith |
| US4888131A (en) * | 1988-03-28 | 1989-12-19 | Exxon Research And Engineering Company | Synthesis gas preparation and catalyst therefor |
-
1990
- 1990-02-12 US US07/479,086 patent/US5026934A/en not_active Expired - Lifetime
-
1991
- 1991-02-12 CA CA002075891A patent/CA2075891A1/fr not_active Abandoned
- 1991-02-12 NZ NZ237096A patent/NZ237096A/en unknown
- 1991-02-12 EP EP91904659A patent/EP0515500A1/fr not_active Withdrawn
- 1991-02-12 WO PCT/US1991/000937 patent/WO1991012224A2/fr not_active Ceased
- 1991-02-25 CN CN91101783.6A patent/CN1064474A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604479A (en) * | 1949-08-05 | 1952-07-22 | Standard Oil Dev Co | Selective oxidation with suspended catalyst |
| US3041273A (en) * | 1953-09-09 | 1962-06-26 | Sinclair Research Inc | Process for the conversion of hydrocarbons with the use of an expanding transfer line reactor |
| US4788372A (en) * | 1987-02-13 | 1988-11-29 | Atlantic Richfield Company | Methane conversion process |
| US4795849A (en) * | 1987-08-04 | 1989-01-03 | Atlantic Richfield Company | Methane conversion process |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2075891A1 (fr) | 1991-08-13 |
| WO1991012224A2 (fr) | 1991-08-22 |
| EP0515500A1 (fr) | 1992-12-02 |
| US5026934A (en) | 1991-06-25 |
| CN1064474A (zh) | 1992-09-16 |
| NZ237096A (en) | 1992-09-25 |
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