BR9906154A - Portador para catalisador para uso na produção de óxido de etileno, catalisador para uso na produção de óxido de etileno e método para produção de óxido de etileno - Google Patents
Portador para catalisador para uso na produção de óxido de etileno, catalisador para uso na produção de óxido de etileno e método para produção de óxido de etilenoInfo
- Publication number
- BR9906154A BR9906154A BR9906154-6A BR9906154A BR9906154A BR 9906154 A BR9906154 A BR 9906154A BR 9906154 A BR9906154 A BR 9906154A BR 9906154 A BR9906154 A BR 9906154A
- Authority
- BR
- Brazil
- Prior art keywords
- production
- ethylene oxide
- catalyst
- carrier
- alkali metal
- Prior art date
Links
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 title abstract 10
- 238000004519 manufacturing process Methods 0.000 title abstract 10
- 239000003054 catalyst Substances 0.000 title abstract 8
- 238000000034 method Methods 0.000 title abstract 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract 4
- 150000001340 alkali metals Chemical class 0.000 abstract 3
- 229910052782 aluminium Inorganic materials 0.000 abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- -1 aluminum compound Chemical class 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 150000003377 silicon compounds Chemical class 0.000 abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/12—Silica and 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
- B01J23/04—Alkali 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/50—Silver
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
-
- 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
- B01J35/612—Surface area less than 10 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
- B01J35/64—Pore diameter
- B01J35/651—50-500 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0221—Coating of particles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
- C07D301/04—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen
- C07D301/08—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase
- C07D301/10—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase with catalysts containing silver or gold
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Catalysts (AREA)
- Epoxy Compounds (AREA)
Abstract
<B>PORTADOR PARA CATALISADOR PARA USO NA PRODUçãO DE óXIDO DE ETILENO, CATALISADOR PARA USO NA PRODUçãO DE óXIDO DE ETILENO E MéTODO PARA PRODUçãO DE óXIDO DE ETILENO <D> São propiciados um portador, o qual permite a preparação de um catalisador que possui um excelente desempenho catalítico e é usado para a produção de óxido de etileno, um catalizador, obtido pelo uso deste portador, dotado de excelente desempenho catalítico e usado para a produção de óxido de etileno, e um método para a produção de óxido de etileno pelo uso do catalisador. O portador é obtido misturando-se <244>-alumina, que tem um teor de metal alcalino na faixa de 1 - 70 mmols/kg (<244>-alumina), com um composto de alumínio, um composto de silício e um composto de metal alcalino, e calcinando a mistura produzida. O portador - que tem um teor de alumínio, quando reduzido a Al, na faixa de 0 - 3 mols/kg de portador, um teor de composto de silício, quando reduzido a Si, na faixa de 0,001-2 mols/kg de portador e um teor de metal alcalino, quando reduzido a metal alcalino, na faixa de 0,01-2 mols/kg de portador - é usado para a deposição de um catalisador para uso na produção de óxido de etileno.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32651698 | 1998-11-17 | ||
JP17896599 | 1999-06-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9906154A true BR9906154A (pt) | 2000-08-08 |
Family
ID=26498968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9906154-6A BR9906154A (pt) | 1998-11-17 | 1999-11-16 | Portador para catalisador para uso na produção de óxido de etileno, catalisador para uso na produção de óxido de etileno e método para produção de óxido de etileno |
Country Status (9)
Country | Link |
---|---|
US (2) | US6313325B1 (pt) |
EP (1) | EP1002575B1 (pt) |
KR (1) | KR100483574B1 (pt) |
CN (1) | CN1140336C (pt) |
AU (1) | AU754631B2 (pt) |
BR (1) | BR9906154A (pt) |
DE (1) | DE69924453T2 (pt) |
IN (1) | IN193645B (pt) |
TW (1) | TW460325B (pt) |
Families Citing this family (34)
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EP1086743B1 (en) * | 1999-09-21 | 2006-08-16 | Nippon Shokubai Co., Ltd. | Catalyst for production of epoxides and methods for production thereof and epoxides |
EP1354626B1 (en) * | 2002-04-04 | 2005-07-13 | Nippon Shokubai Co., Ltd. | Alumina-silica supported silver catalyst and use thereof in the production of epoxide |
CN100512966C (zh) | 2002-06-28 | 2009-07-15 | 国际壳牌研究有限公司 | 提高催化剂选择性的方法和烯烃环氧化方法 |
BRPI0312010B1 (pt) | 2002-06-28 | 2017-11-28 | Shell Internationale Research Maatschappij B.V | Method for detaining an epoxidation process and a process for the epoxidation of an olefine |
US20040138483A1 (en) * | 2002-10-28 | 2004-07-15 | Rubinstein Leonid Isaakovich | Olefin oxide catalysts |
US7348444B2 (en) | 2003-04-07 | 2008-03-25 | Shell Oil Company | Process for the production of an olefin oxide |
US20040225138A1 (en) | 2003-05-07 | 2004-11-11 | Mcallister Paul Michael | Reactor system and process for the manufacture of ethylene oxide |
US8148555B2 (en) | 2003-06-26 | 2012-04-03 | Shell Oil Company | Method for improving the selectivity of a catalyst and a process for the epoxidation of an olefin |
US20060258532A1 (en) * | 2003-08-22 | 2006-11-16 | Thorsteinson Erlind M | Improved alumina carriers and silver-based catalysts for the production of alkylene oxides |
US20060293180A1 (en) * | 2003-08-22 | 2006-12-28 | Thorsteinson Erlind M | Modified alumina carriers and silver-based catalysts for the production of alkylene oxides |
EP1675678B1 (en) | 2003-10-16 | 2011-09-28 | Dow Technology Investments LLC | Catalysts having enhanced stability, efficiency and/or activity for alkylene oxide production |
TW200600190A (en) * | 2004-04-01 | 2006-01-01 | Shell Int Research | Process for preparing a silver catalyst, the catalyst, and use thereof in olefin oxidation |
MX2007001684A (es) * | 2004-08-12 | 2007-04-12 | Shell Int Research | Metodo para la preparacion de un catalizador formado, el catalizador, y uso del catalizador. |
MX2007003418A (es) | 2004-09-24 | 2007-05-07 | Shell Int Research | Proceso para seleccionar particulas moldeadas, proceso para instalar un sistema, proceso para hacer reaccionar una alimentacion gaseosa de este sistema, producto de programa de computo y sistema de computo. |
US7759284B2 (en) * | 2005-05-09 | 2010-07-20 | Scientific Design Company, Inc. | Calcination in an inert gas in the presence of a small concentration of an oxidizing component |
US8084390B2 (en) | 2005-06-07 | 2011-12-27 | Shell Oil Company | Catalyst, a process for preparing the catalyst and a process for the production of an olefin oxide, a 1,2-diol, a 1,2 diol ether, or an alkanolamine |
BRPI0611817A2 (pt) * | 2005-06-07 | 2011-12-20 | Saint Gobain Ceramics | veìculo catalisador e um processo para preparação do veìculo catalisador |
MX2008002004A (es) * | 2005-08-11 | 2008-03-27 | Shell Int Research | Metodo de preparacion de un catalizador con forma, el catalizador y uso del mismo. |
US10532989B2 (en) | 2007-05-09 | 2020-01-14 | Shell Oil Company | Epoxidation catalyst, a process for preparing the catalyst, and a process for the production of an olefin oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine |
CA2723176C (en) * | 2008-04-30 | 2014-11-25 | Dow Technology Investments Llc | Porous body precursors, shaped porous bodies, processes for making them, and end-use products based upon the same |
EP2282832A1 (en) * | 2008-04-30 | 2011-02-16 | Dow Technology Investments LLC | Porous body precursors, shaped porous bodies, processes for making them, and end-use products based upon the same |
EP2274093A1 (en) | 2008-04-30 | 2011-01-19 | Dow Technology Investments LLC | Porous body precursors, shaped porous bodies, processes for making them, and end-use products based upon the same |
CN102066348B (zh) | 2008-05-07 | 2013-09-25 | 国际壳牌研究有限公司 | 环氧烷、1,2-二醇、1,2-二醇醚、1,2-碳酸酯或链烷醇胺的制备方法 |
EP2297124B1 (en) | 2008-05-07 | 2013-08-21 | Shell Internationale Research Maatschappij B.V. | A process for the start-up of an epoxidation process, a process for the production of ethylene oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine |
CN102099346A (zh) | 2008-07-14 | 2011-06-15 | 巴斯夫欧洲公司 | 制备环氧乙烷的方法 |
US8349765B2 (en) | 2008-07-18 | 2013-01-08 | Scientific Design Company, Inc. | Mullite-containing carrier for ethylene oxide catalysts |
US8524927B2 (en) | 2009-07-13 | 2013-09-03 | Velocys, Inc. | Process for making ethylene oxide using microchannel process technology |
US8629079B2 (en) * | 2011-04-14 | 2014-01-14 | Basf Se | Process for producing a catalyst for the oxidation of ethylene to ethylene oxide |
CN103608107B (zh) * | 2011-04-14 | 2015-11-25 | 巴斯夫欧洲公司 | 制备用于将乙烯氧化为氧化乙烯的催化剂的方法 |
US9073035B2 (en) * | 2011-10-14 | 2015-07-07 | Saint-Gobain Ceramics & Plastics, Inc. | Catalyst and catalyst carrier |
CN103721696A (zh) * | 2012-10-12 | 2014-04-16 | 中国石油化工股份有限公司 | 一种制备银催化剂用α-氧化铝载体的方法 |
CN105817224B (zh) * | 2015-01-07 | 2018-07-20 | 中国石油化工股份有限公司 | 一种银催化剂的制备方法、银催化剂及该银催化剂的应用 |
CN106607028B (zh) * | 2015-10-21 | 2018-12-28 | 中国石油化工股份有限公司 | 一种银催化剂及其制备方法和应用 |
TWI774707B (zh) | 2016-12-02 | 2022-08-21 | 荷蘭商蜆殼國際研究所 | 用於調節乙烯環氧化催化劑之方法及用於製造環氧乙烷之相關方法 |
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US4212772A (en) * | 1976-05-19 | 1980-07-15 | Basf Aktiengesellschaft | Catalyst for the manufacture of ethylene oxide |
US4168247A (en) | 1976-05-28 | 1979-09-18 | Imperial Chemical Industries Limited | Catalysts for the production of alkylene oxides |
US4368144A (en) * | 1980-12-22 | 1983-01-11 | Nippon Shokubai Kagaku Kogyo Co., Ltd. | Silver catalyst for production of ethylene oxide |
JPS57107240A (en) * | 1980-12-26 | 1982-07-03 | Nippon Shokubai Kagaku Kogyo Co Ltd | Production of silver catalyst for producing ethylene oxide |
JPS57171435A (en) | 1981-04-14 | 1982-10-22 | Noritake Co Ltd | Alumina catalyst carrier for partial oxidation and prepatation thereof |
DE3305805A1 (de) * | 1983-02-19 | 1984-08-23 | Basf Ag, 6700 Ludwigshafen | Verfahren zur regenerierung von silberhaltigen traegerkatalysatoren fuer die herstellung von ethylenoxid |
JPS60216844A (ja) * | 1984-04-13 | 1985-10-30 | Nippon Shokubai Kagaku Kogyo Co Ltd | エチレンオキシド製造用銀触媒 |
GB8423044D0 (en) * | 1984-09-12 | 1984-10-17 | Ici Plc | Production of ethylene oxide |
NL8501862A (nl) * | 1985-06-28 | 1987-01-16 | Shell Int Research | Werkwijze ter bereiding van een zilver-houdende katalysator. |
IN170003B (pt) | 1985-06-28 | 1992-01-25 | Shell Int Research | |
GB8613818D0 (en) * | 1986-06-06 | 1986-07-09 | Ici Plc | Catalysts |
DE3528313A1 (de) * | 1985-08-07 | 1987-02-12 | Basf Ag | Silberkatalysator, seine herstellung und verwendung |
US4994589A (en) * | 1985-08-13 | 1991-02-19 | Union Carbide Chemicals And Plastics Company Inc. | Catalytic system for epoxidation of alkenes |
AU586048B2 (en) * | 1985-11-12 | 1989-06-29 | Nippon Shokubai Kagaku Kogyo Co. Ltd. | Silver catalyst for production of ethylene oxide and method for manufacture thereof |
GB8610441D0 (en) * | 1986-04-29 | 1986-06-04 | Shell Int Research | Preparation of silver-containing catalyst |
GB8611121D0 (en) * | 1986-05-07 | 1986-06-11 | Shell Int Research | Silver catalyst |
JPH084745B2 (ja) | 1986-05-09 | 1996-01-24 | 三菱化学株式会社 | エチレンオキシド製造用銀触媒 |
GB8626687D0 (en) * | 1986-11-07 | 1986-12-10 | Shell Int Research | Preparing silver catalyst |
DE3643248A1 (de) * | 1986-12-18 | 1988-06-30 | Basf Ag | Silberkatalysator, seine herstellung und verwendung |
US5057481A (en) * | 1987-02-20 | 1991-10-15 | Union Carbide Chemicals And Plastics Technology Corporation | Catalyst composition for oxidation of ethylene to ethylene oxide |
CN1009437B (zh) * | 1988-02-03 | 1990-09-05 | 中国石油化工总公司 | 乙烯氧化制环氧乙烷高效银催化剂 |
JP2637537B2 (ja) * | 1989-01-24 | 1997-08-06 | 株式会社日本触媒 | エチレンオキシド製造用銀触媒およびその製造方法 |
US5051395A (en) * | 1989-09-25 | 1991-09-24 | Union Carbide Chemicals And Plastics Technology Corporation | Alkylene oxide catalysts having enhanced activity and/or efficiency |
KR0147853B1 (ko) * | 1990-10-12 | 1998-08-17 | 티모시 엔. 비숍 | 활성 및/또는 안정성이 개선된 알킬렌 옥사이드 촉매 |
US5112795A (en) * | 1990-10-12 | 1992-05-12 | Union Carbide Chemicals & Plastics Technology Corporation | Supported silver catalyst, and processes for making and using same |
US5100859A (en) | 1991-01-22 | 1992-03-31 | Norton Company | Catalyst carrier |
US5145824A (en) * | 1991-01-22 | 1992-09-08 | Shell Oil Company | Ethylene oxide catalyst |
JP3233652B2 (ja) * | 1991-05-21 | 2001-11-26 | 株式会社日本触媒 | エチレンオキシド製造用銀触媒 |
JP3312916B2 (ja) | 1991-06-06 | 2002-08-12 | 三菱化学株式会社 | 酸化エチレン製造用銀触媒 |
CA2089510C (en) * | 1992-02-27 | 1998-09-01 | Shinichi Nagase | Silver catalyst for production of ethylene oxide and method for production of the catalyst |
US5380697A (en) * | 1993-09-08 | 1995-01-10 | Shell Oil Company | Ethylene oxide catalyst and process |
-
1999
- 1999-11-15 IN IN900KO1999 patent/IN193645B/en unknown
- 1999-11-15 DE DE69924453T patent/DE69924453T2/de not_active Expired - Lifetime
- 1999-11-15 AU AU59429/99A patent/AU754631B2/en not_active Ceased
- 1999-11-15 TW TW088119876A patent/TW460325B/zh not_active IP Right Cessation
- 1999-11-15 EP EP99122675A patent/EP1002575B1/en not_active Expired - Lifetime
- 1999-11-16 KR KR19990050891A patent/KR100483574B1/ko not_active IP Right Cessation
- 1999-11-16 BR BR9906154-6A patent/BR9906154A/pt not_active Application Discontinuation
- 1999-11-16 US US09/441,545 patent/US6313325B1/en not_active Expired - Fee Related
- 1999-11-17 CN CNB99126634XA patent/CN1140336C/zh not_active Expired - Fee Related
-
2001
- 2001-11-02 US US10/052,785 patent/US6815395B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR100483574B1 (ko) | 2005-04-19 |
EP1002575A3 (en) | 2000-07-05 |
IN193645B (pt) | 2004-07-31 |
AU754631B2 (en) | 2002-11-21 |
EP1002575A2 (en) | 2000-05-24 |
EP1002575B1 (en) | 2005-03-30 |
TW460325B (en) | 2001-10-21 |
CN1257752A (zh) | 2000-06-28 |
AU5942999A (en) | 2000-05-18 |
CN1140336C (zh) | 2004-03-03 |
US20020103390A1 (en) | 2002-08-01 |
DE69924453D1 (de) | 2005-05-04 |
US6313325B1 (en) | 2001-11-06 |
KR20000047661A (ko) | 2000-07-25 |
DE69924453T2 (de) | 2006-02-16 |
US6815395B2 (en) | 2004-11-09 |
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