ES2106848T3 - Reactor para el blanqueo de pasta en dos etapas y metodo de blanqueo con ozono. - Google Patents
Reactor para el blanqueo de pasta en dos etapas y metodo de blanqueo con ozono.Info
- Publication number
- ES2106848T3 ES2106848T3 ES92610036T ES92610036T ES2106848T3 ES 2106848 T3 ES2106848 T3 ES 2106848T3 ES 92610036 T ES92610036 T ES 92610036T ES 92610036 T ES92610036 T ES 92610036T ES 2106848 T3 ES2106848 T3 ES 2106848T3
- Authority
- ES
- Spain
- Prior art keywords
- ozone
- paper pulp
- particles
- paper
- bleaching
- 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.)
- Expired - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Detergent Compositions (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Laminated Bodies (AREA)
- Noodles (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Catalysts (AREA)
Abstract
SE INVENTA UN METODO Y APARATO DE DOS FASES DE BLANQUEO POR OZONO DE PASTAS DE PAPEL. EN LA PRIMERA FASE, SE MEZCLAN DE FORMA TURBULENTA PARTICULAS DE PASTA DE PAPEL DE CONSISTENCIA ELEVADA Y SE PONEN EN CONTACTO CON UNA MEZCLA GASEOSA QUE CONTIENE OZONO PARA MEZCLAR Y PONER EN CONTACTO SUBSTANCIALMENTE TODAS LAS PARTICULAS DE LA PASTA DE PAPEL CON EL OZONO PARA HACER REACCIONAR AL MENOS UNA PARTE DE LAS PARTICULAS DE LA PASTA DE PAPEL CON EL OZONO. A CONTINUACION, LAS PARTICULAS DE PASTA DE PAPEL Y LA MEZCLA DE BLANQUEO GASEOSO SE DIRIGEN A UNA SEGUNDA FASE QUE INCLUYE UNA BASE DE PASTA DE PAPEL ESTABLE. LAS PARTICULAS DE PASTA DE PAPEL PUEDEN COMPLETAR SU REACCION EN EL LECHO, QUE TAMBIEN SIRVE PARA DESPRENDER EL OZONO QUE NO ESTABA EN CONTACTO CON LAS PARTICULAS DE PASTA DE PAPEL EN LA PRIMERA ETAPA DE LA MEZCLA DE BLANQUEO GASEOSO.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70569191A | 1991-05-24 | 1991-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2106848T3 true ES2106848T3 (es) | 1997-11-16 |
| ES2106848T5 ES2106848T5 (es) | 2001-09-01 |
Family
ID=24834543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES92610036T Expired - Lifetime ES2106848T5 (es) | 1991-05-24 | 1992-05-19 | Metodo de blanqueo con ozono. |
Country Status (17)
| Country | Link |
|---|---|
| US (2) | US5451296A (es) |
| EP (1) | EP0515303B2 (es) |
| JP (1) | JPH0791794B2 (es) |
| KR (1) | KR960003430B1 (es) |
| CN (1) | CN1051825C (es) |
| AT (1) | ATE156539T1 (es) |
| AU (1) | AU654854B2 (es) |
| BR (1) | BR9201959A (es) |
| CA (1) | CA2068981C (es) |
| DE (1) | DE69221385T2 (es) |
| ES (1) | ES2106848T5 (es) |
| FI (1) | FI922279A7 (es) |
| NO (1) | NO300103B1 (es) |
| NZ (1) | NZ242792A (es) |
| RU (1) | RU2114231C1 (es) |
| SE (1) | SE9201605L (es) |
| ZA (1) | ZA923757B (es) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5181989A (en) * | 1990-10-26 | 1993-01-26 | Union Camp Patent Holdings, Inc. | Reactor for bleaching high consistency pulp with ozone |
| US5472572A (en) * | 1990-10-26 | 1995-12-05 | Union Camp Patent Holding, Inc. | Reactor for bleaching high consistency pulp with ozone |
| US6126781A (en) * | 1991-08-01 | 2000-10-03 | Union Camp Patent Holding, Inc. | Process for conditioning ozone gas recycle stream in ozone pulp bleaching |
| US5810973A (en) * | 1993-09-21 | 1998-09-22 | Beloit Technologies, Inc. | Apparatus for producing small particles from high consistency wood pulp |
| WO1996002697A1 (en) * | 1994-07-14 | 1996-02-01 | Union Camp Patent Holding, Inc. | Improved bleaching of high consistency lignocellulosic pulp |
| US5944952A (en) * | 1995-07-26 | 1999-08-31 | Beloit Technologies, Inc. | Method for bleaching high consistency pulp with a gaseous bleaching reagent |
| JPH10510599A (ja) * | 1995-07-26 | 1998-10-13 | ベロイト・テクノロジーズ・インコーポレイテッド | パルプを漂白試薬ガスで漂白する方法及び装置 |
| US5733412A (en) * | 1995-09-13 | 1998-03-31 | International Paper Company | Decolorizing brown fibers in recycled pulp |
| US6077396A (en) * | 1997-05-16 | 2000-06-20 | Lariviere; Christopher J. | Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent |
| SE522593C2 (sv) * | 1999-07-06 | 2004-02-24 | Kvaerner Pulping Tech | System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material |
| KR20030046621A (ko) * | 2001-12-16 | 2003-06-18 | 한국전자통신연구원 | 계층화 구조의 프로토콜 스택을 사용하는 스마트 카드와휴대 단말기의 통신 환경 설정 방법 |
| US20030165411A1 (en) * | 2002-01-23 | 2003-09-04 | Rolf Engelhard | Compact ozone generator |
| RU2228564C2 (ru) * | 2002-04-01 | 2004-05-10 | Марийский государственный технический университет | Печатная рамочная антенна |
| CA2383279A1 (fr) * | 2002-05-06 | 2003-11-06 | Sylvain Cloutier | Reacteur |
| US20040200589A1 (en) * | 2003-04-08 | 2004-10-14 | Herring William J. | Method of making pulp having high hemicellulose content |
| US20040200587A1 (en) * | 2003-04-08 | 2004-10-14 | Herring William J. | Cellulose pulp having increased hemicellulose content |
| US20050115690A1 (en) * | 2003-11-25 | 2005-06-02 | Casella Waste Systems, Inc. | Methods for producing recycled pulp from waste paper |
| RU2265479C2 (ru) * | 2004-01-15 | 2005-12-10 | Государственное образовательное учреждение высшего профессионального образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) | Реактор-смеситель для проведения процесса карбоксиметилирования щелочной целлюлозы |
| CA2583256C (en) * | 2004-09-10 | 2013-01-29 | Iogen Energy Corporation | Process for producing a pretreated feedstock |
| US7541396B2 (en) * | 2004-12-29 | 2009-06-02 | Weyerhaeuser Nr Company | Method for making carboxyalkyl cellulose |
| US7837951B2 (en) * | 2005-01-05 | 2010-11-23 | Gsg Holdings, Inc. | Modular ozone generator with an air diffuser |
| KR20110067992A (ko) * | 2009-12-15 | 2011-06-22 | 삼성전자주식회사 | 내부발열을 이용한 바이오매스의 전처리 방법 및 전처리 장치 |
| CN107489052B (zh) * | 2017-08-30 | 2022-10-21 | 昆明理工大学 | 一种臭氧漂白装置 |
Family Cites Families (74)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1642978A (en) * | 1924-12-06 | 1927-09-20 | Thorne Carl Busch | Process for bleaching and like purposes |
| US1591070A (en) * | 1925-02-27 | 1926-07-06 | Robert B Wolf | Bleaching apparatus |
| US1643566A (en) * | 1925-10-16 | 1927-09-27 | Thorne Carl Busch | Process for bleaching and the like purposes |
| US1818913A (en) * | 1928-04-12 | 1931-08-11 | Chemipulp Process Inc | Method and apparatus for the chemical treatment of pulp |
| US1957937A (en) * | 1930-10-10 | 1934-05-08 | Int Paper Co | Process of bleaching fibrous cellulose material |
| US2013115A (en) * | 1931-09-21 | 1935-09-03 | Thorne Carl Busch | Process and apparatus for the refining of pulp |
| US2431478A (en) * | 1942-07-25 | 1947-11-25 | Raymond P Hill | Bleaching fibrous material |
| US2466633A (en) * | 1948-05-26 | 1949-04-05 | James M Daily | Method of bleaching cellulosic pulp |
| US3318657A (en) * | 1963-09-23 | 1967-05-09 | Metal Hydrides Inc | Method of bleaching cellulose fibres |
| FR1441787A (fr) * | 1965-04-30 | 1966-06-10 | Progil | Procédé de blanchiment des pâtes à papier |
| SE333095B (es) * | 1967-04-21 | 1971-03-01 | Calor & Sjoegren Ab | |
| US3703435A (en) * | 1967-11-09 | 1972-11-21 | Sunds Ab | Method for finely disintegrating pulp,preferentially cellulose pulp,in connection with the bleaching thereof with gaseous bleaching agent |
| US3630828A (en) * | 1968-05-13 | 1971-12-28 | Pulp Paper Res Inst | Bleaching of a low-density, substantially uncompacted, porous fluffed cellulosic pulp |
| OA03094A (fr) * | 1968-07-11 | 1970-12-15 | P P I South African Pulp And P | Perfectionnements à la délignification et au blanchiment des pâtes de cellulose avec l'oxygène gazeux. |
| CA902859A (en) * | 1969-11-26 | 1972-06-20 | Pulp And Paper Research Institute Of Canada | Chemical reaction between a solid and a gas |
| CA902861A (en) * | 1969-11-27 | 1972-06-20 | Pulp And Paper Research Institute Of Canada | Bleaching of cellulosic pulp |
| US4196043A (en) * | 1970-12-21 | 1980-04-01 | Scott Paper Company | Kraft pulp bleaching and recovery process |
| CA966604A (en) * | 1970-12-21 | 1975-04-29 | Scott Paper Company | Kraft pulp bleaching and recovery process |
| CA970111A (en) * | 1970-12-21 | 1975-07-01 | Rudra P. Singh | Preparation of wood pulp |
| US3785577A (en) * | 1972-07-18 | 1974-01-15 | Improved Machinery Inc | Apparatus for the gaseous reaction of material |
| US3814664A (en) * | 1972-09-11 | 1974-06-04 | Improved Machinery Inc | Gaseous reaction apparatus including a peripheral gas receiving chamber |
| US4105494A (en) * | 1973-01-05 | 1978-08-08 | Sunds Aktiebolag | Process of gas-phase bleaching high consistency finely disintegrated pulp |
| US3832276A (en) * | 1973-03-07 | 1974-08-27 | Int Paper Co | Delignification and bleaching of a cellulose pulp slurry with oxygen |
| US3964962A (en) * | 1974-02-25 | 1976-06-22 | Ingersoll-Rand Company | Gaseous reaction apparatus and processes including a peripheral gas receiving chamber and a gas recirculation conduit |
| SE394466C (sv) * | 1974-05-16 | 1986-06-23 | Mannbro Systems Handelsbolag | Sett vid kontinuerlig alkalisk delignifiering av lignocellulosamaterial i tva eller flera steg, varav det sista med syrgas |
| US4046621A (en) * | 1974-12-17 | 1977-09-06 | The Ontario Paper Company Limited | Process for treating a slurry of cellulosic material |
| SE389351B (sv) * | 1975-03-14 | 1976-11-01 | Kamyr Ab | Sett och anordning for fordelning och inblandning av gas och/eller vetska i massasuspensioner av hog koncentration. |
| US4119486A (en) * | 1975-08-14 | 1978-10-10 | Westvaco Corporation | Process for bleaching wood pulp with ozone in the presence of a cationic surfactant |
| NO137651C (no) * | 1975-10-31 | 1978-03-29 | Myrens Verksted As | Fremgangsmaate og apparat til kontinuerlig behandling av findelt fibermateriale eller celluloseholdig masse med gass uten overtrykk. |
| US4226673A (en) * | 1976-03-15 | 1980-10-07 | Champion International Corporation | Color removal from paper and pulp mill aqueous effluents |
| US4080249A (en) * | 1976-06-02 | 1978-03-21 | International Paper Company | Delignification and bleaching of a lignocellulosic pulp slurry with ozone |
| FI67413C (fi) * | 1977-04-27 | 1985-03-11 | Myrens Verksted As | Foerfarande foer behandling av finfoerdelad fiberhaltig eller cellulosahaltig massa samt anordning foer utfoerande av foerfarandet |
| JPS5430902A (en) * | 1977-06-27 | 1979-03-07 | Seisan Kaihatsu Kagaku Kenkyus | Industrial multistage pulp bleaching method |
| US4216054A (en) * | 1977-09-26 | 1980-08-05 | Weyerhaeuser Company | Low-consistency ozone delignification |
| NO142091C (no) * | 1977-10-17 | 1980-06-25 | Myrens Verksted As | Fremgangsmaate ved ozonbehandling av raffinoermekanisk og termomekanisk masse. |
| NO144711C (no) * | 1978-04-04 | 1981-10-21 | Myrens Verksted As | Fremgangsmaate til bleking av oksygendelignifiserte celluloseholdige masser med ozon |
| CA1112813A (en) * | 1978-04-06 | 1981-11-24 | Arthur W. Kempf | Method for extracting ozone-treated fibrous materials |
| CA1132760A (en) * | 1978-04-07 | 1982-10-05 | Richard B. Phillips | Chlorine free process for bleaching lignocellulosic pulp |
| US4372812A (en) * | 1978-04-07 | 1983-02-08 | International Paper Company | Chlorine free process for bleaching lignocellulosic pulp |
| CS210414B1 (en) * | 1978-09-28 | 1982-01-29 | Ladislav Zilka | Shovel conveyer built in the continuous cylindrical boiling tank |
| US4229252A (en) * | 1979-01-11 | 1980-10-21 | Weyerhaeuser Company | Additives for ozone bleaching |
| US4298426A (en) * | 1979-06-15 | 1981-11-03 | Weyerhaeuser Company | Method and apparatus for treating pulp with oxygen in a multi-stage bleaching sequence |
| US4295925A (en) * | 1979-06-15 | 1981-10-20 | Weyerhaeuser Company | Treating pulp with oxygen |
| US4363697A (en) * | 1979-12-03 | 1982-12-14 | The Black Clawson Company | Method for medium consistency oxygen delignification of pulp |
| FR2474550A1 (fr) * | 1980-01-24 | 1981-07-31 | Scott Paper Co | Procede de blanchiment de pate cellulosique |
| US4283251A (en) * | 1980-01-24 | 1981-08-11 | Scott Paper Company | Ozone effluent bleaching |
| CA1154205A (en) * | 1980-04-15 | 1983-09-27 | Madhu P. Godsay | Brightness improvement of ozone bleached pulps |
| US4444621A (en) * | 1980-11-21 | 1984-04-24 | Mo Och Domsjo Aktiebolag | Process and apparatus for the deresination and brightness improvement of cellulose pulp |
| US4384920A (en) * | 1981-04-06 | 1983-05-24 | The Black Clawson Company | Method and apparatus for oxygen delignification |
| ZA821923B (en) * | 1981-04-06 | 1983-02-23 | Black Clawson Co | Method and apparatus for oxygen delignification |
| CA1181204A (en) * | 1981-06-17 | 1985-01-22 | Russell W. Hoag | Method and system for reacting ozone with pulp |
| US4468286A (en) * | 1982-03-09 | 1984-08-28 | Myrens Verksted A/S | Method of gas treatment of fluffed pulp |
| US4426256A (en) * | 1982-03-09 | 1984-01-17 | Myrens Verksted A/S | Apparatus for treating fibrous material with a gas |
| WO1984000181A1 (en) * | 1982-06-24 | 1984-01-19 | Scott Paper Co | Ozone bleaching of cellulosic materials |
| ZA835925B (en) * | 1982-09-30 | 1984-04-25 | Black Clawson Co | Method and apparatus for oxygen delignification |
| AU1730083A (en) * | 1982-09-30 | 1984-04-05 | Black Clawson Company, The | Oxygen treatment of low connistancy pulp |
| GB2144458A (en) * | 1983-06-25 | 1985-03-06 | Berstorff Gmbh Masch Hermann | Apparatus and method for producing wood pulp |
| US4619733A (en) * | 1983-11-30 | 1986-10-28 | Kooi Boon Lam | Pollution free pulping process using recycled wash effluent from multiple bleach stages to remove black liquor and recovering sodium hydroxide from the black liquor |
| US4640782A (en) * | 1985-03-13 | 1987-02-03 | Ozo-Tek, Inc. | Method and apparatus for the generation and utilization of ozone and singlet oxygen |
| FR2585385B1 (fr) * | 1985-07-26 | 1987-10-30 | Lamort E & M | Procede et appareillage de preparation et triage primaire de pate a papier |
| FR2609067B1 (fr) * | 1986-12-31 | 1990-06-15 | Beghin Say Sa | Procede pour le traitement a l'ozone d'une pate cellulosique |
| AT388193B (de) * | 1987-06-12 | 1989-05-10 | Andritz Ag Maschf | Mischer |
| FR2620744A1 (fr) * | 1987-09-17 | 1989-03-24 | Degremont | Procede de traitement par l'ozone de materiaux ligno-cellulosiques, notamment de pates a papier et reacteur pour la mise en oeuvre de ce procede |
| US4959124A (en) * | 1989-05-05 | 1990-09-25 | International Paper Company | Method of bleaching kraft pulp in a DZED sequence |
| FI89516B (fi) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande foer blekning av cellulosamassa med otson |
| AT394737B (de) * | 1989-07-03 | 1992-06-10 | Andritz Ag Maschf | Verfahren und vorrichtung zur behandlung, insbesondere waesche, von faserstoff-fluessigkeit- mischungen |
| AT395180B (de) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung |
| AU636173B2 (en) * | 1989-10-30 | 1993-04-22 | Lenzing Aktiengesellschaft | Method for the chlorine-free bleaching of pulps |
| US5164043A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| US5164044A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| EP0483163B1 (en) † | 1990-05-17 | 1995-05-10 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials |
| US5174861A (en) * | 1990-10-26 | 1992-12-29 | Union Camp Patent Holdings, Inc. | Method of bleaching high consistency pulp with ozone |
| EP0492039A1 (en) * | 1990-12-27 | 1992-07-01 | Kamyr, Inc. | Pneumatic reactor ozone bleaching of paper pulp |
| CA2046717A1 (en) * | 1991-02-06 | 1992-08-07 | Beloit Technologies, Inc. | Method and apparatus for treating fibrous materials with a gaseous reagent |
-
1992
- 1992-05-19 NZ NZ242792A patent/NZ242792A/en unknown
- 1992-05-19 CA CA002068981A patent/CA2068981C/en not_active Expired - Fee Related
- 1992-05-19 AT AT92610036T patent/ATE156539T1/de not_active IP Right Cessation
- 1992-05-19 DE DE69221385T patent/DE69221385T2/de not_active Expired - Fee Related
- 1992-05-19 EP EP92610036A patent/EP0515303B2/en not_active Expired - Lifetime
- 1992-05-19 ES ES92610036T patent/ES2106848T5/es not_active Expired - Lifetime
- 1992-05-19 FI FI922279A patent/FI922279A7/fi unknown
- 1992-05-20 AU AU17000/92A patent/AU654854B2/en not_active Ceased
- 1992-05-21 NO NO921999A patent/NO300103B1/no not_active IP Right Cessation
- 1992-05-21 SE SE9201605A patent/SE9201605L/xx not_active Application Discontinuation
- 1992-05-22 RU SU5052060A patent/RU2114231C1/ru active
- 1992-05-22 ZA ZA923757A patent/ZA923757B/xx unknown
- 1992-05-23 CN CN92105099A patent/CN1051825C/zh not_active Expired - Fee Related
- 1992-05-23 KR KR1019920008761A patent/KR960003430B1/ko not_active Expired - Fee Related
- 1992-05-25 JP JP4132681A patent/JPH0791794B2/ja not_active Expired - Lifetime
- 1992-05-25 BR BR929201959A patent/BR9201959A/pt not_active IP Right Cessation
-
1994
- 1994-03-08 US US08/208,067 patent/US5451296A/en not_active Expired - Fee Related
- 1994-03-08 US US08/208,069 patent/US5989388A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5989388A (en) | 1999-11-23 |
| BR9201959A (pt) | 1993-01-12 |
| SE9201605D0 (sv) | 1992-05-21 |
| AU1700092A (en) | 1992-12-03 |
| JPH0791794B2 (ja) | 1995-10-04 |
| ATE156539T1 (de) | 1997-08-15 |
| EP0515303A1 (en) | 1992-11-25 |
| SE9201605L (sv) | 1992-11-25 |
| AU654854B2 (en) | 1994-11-24 |
| NO921999L (no) | 1992-11-25 |
| NZ242792A (en) | 1993-12-23 |
| FI922279L (fi) | 1992-11-25 |
| RU2114231C1 (ru) | 1998-06-27 |
| CN1070971A (zh) | 1993-04-14 |
| FI922279A7 (fi) | 1992-11-25 |
| KR960003430B1 (ko) | 1996-03-13 |
| CA2068981C (en) | 1996-08-27 |
| CN1051825C (zh) | 2000-04-26 |
| KR920021806A (ko) | 1992-12-18 |
| EP0515303B1 (en) | 1997-08-06 |
| ZA923757B (en) | 1993-01-27 |
| FI922279A0 (fi) | 1992-05-19 |
| ES2106848T5 (es) | 2001-09-01 |
| NO300103B1 (no) | 1997-04-07 |
| NO921999D0 (no) | 1992-05-21 |
| JPH05263386A (ja) | 1993-10-12 |
| EP0515303B2 (en) | 2001-07-04 |
| DE69221385T2 (de) | 1997-12-11 |
| CA2068981A1 (en) | 1992-11-25 |
| US5451296A (en) | 1995-09-19 |
| DE69221385D1 (de) | 1997-09-11 |
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