NO175209B - - Google Patents
Info
- Publication number
- NO175209B NO175209B NO903784A NO903784A NO175209B NO 175209 B NO175209 B NO 175209B NO 903784 A NO903784 A NO 903784A NO 903784 A NO903784 A NO 903784A NO 175209 B NO175209 B NO 175209B
- Authority
- NO
- Norway
- Prior art keywords
- valve
- slurry
- time
- elongated
- stated
- Prior art date
Links
- 239000002002 slurry Substances 0.000 claims abstract description 36
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000003085 diluting agent Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 12
- 239000000178 monomer Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims description 38
- 230000008020 evaporation Effects 0.000 claims description 38
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 150000001336 alkenes Chemical class 0.000 description 4
- -1 ethylene, propylene Chemical group 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethylcyclohexane Chemical compound CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methylcyclopentane Chemical compound CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1812—Tubular reactors
- B01J19/1837—Loop-type reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
-
- 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
- B01J8/005—Separating solid material from the gas/liquid stream
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/14—Organic medium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Graft Or Block Polymers (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/400,620 US5183866A (en) | 1989-08-30 | 1989-08-30 | Polymer recovery process |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| NO903784D0 NO903784D0 (no) | 1990-08-29 |
| NO903784L NO903784L (no) | 1991-03-01 |
| NO175209B true NO175209B (cs) | 1994-06-06 |
| NO175209C NO175209C (no) | 1994-09-14 |
Family
ID=23584339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO903784A NO175209C (no) | 1989-08-30 | 1990-08-29 | Fremgangsmåte for polymerisering av monomerer i et flytende fortynningsmiddel |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5183866A (cs) |
| EP (1) | EP0415427B1 (cs) |
| JP (1) | JP2701968B2 (cs) |
| KR (1) | KR0149444B1 (cs) |
| AT (1) | ATE122689T1 (cs) |
| CA (1) | CA2018920C (cs) |
| DE (1) | DE69019439T2 (cs) |
| DZ (1) | DZ1443A1 (cs) |
| ES (1) | ES2072340T3 (cs) |
| HU (1) | HU209740B (cs) |
| MX (1) | MX171494B (cs) |
| NO (1) | NO175209C (cs) |
Families Citing this family (49)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5575979A (en) * | 1991-03-04 | 1996-11-19 | Phillips Petroleum Company | Process and apparatus for separating diluents from solid polymers utilizing a two-stage flash and a cyclone separator |
| US5207929A (en) * | 1991-08-02 | 1993-05-04 | Quantum Chemical Corporation | Method for removing hydrocarbons from polymer slurries |
| US5314579A (en) * | 1992-01-13 | 1994-05-24 | Quantum Chemical Corporation | Process for removing hydrocarbons from polymer slurries |
| US5455314A (en) * | 1994-07-27 | 1995-10-03 | Phillips Petroleum Company | Method for controlling removal of polymerization reaction effluent |
| CN1060784C (zh) * | 1997-01-08 | 2001-01-17 | 北京燕山石油化工公司研究院 | 聚合物溶液的浓缩方法 |
| US6815511B2 (en) * | 1997-07-15 | 2004-11-09 | Chevron Phillips Chemical Company, Lp | Continuous withdrawal from high solids slurry polymerization |
| US6239235B1 (en) * | 1997-07-15 | 2001-05-29 | Phillips Petroleum Company | High solids slurry polymerization |
| US20020111441A1 (en) | 1998-03-20 | 2002-08-15 | Kendrick James Austin | Continuous slurry polymerization volatile removal |
| DE69909263T2 (de) | 1998-03-20 | 2004-04-22 | Exxonmobil Chemical Patents Inc., Baytown | Kontinuierliches entfernen flüchtiger bestandteile aus suspensionspolymerisation |
| US6281300B1 (en) * | 1998-03-20 | 2001-08-28 | Exxon Chemical Patents, Inc. | Continuous slurry polymerization volatile removal |
| KR100531628B1 (ko) * | 1998-03-20 | 2005-11-29 | 엑손모빌 케미칼 패턴츠 인코포레이티드 | 연속적인 슬러리 중합반응의 휘발물질 제거 |
| EP1348480B1 (en) * | 1998-03-20 | 2008-05-21 | Chevron Phillips Chemical Company LP | Continuous slurry polymerisation volatile removal |
| US7268194B2 (en) * | 1998-03-20 | 2007-09-11 | Exxonmobil Chemical Patents Inc. | Continuous slurry polymerization process and apparatus |
| CN1301788C (zh) * | 1998-05-18 | 2007-02-28 | 埃克森美孚化学专利公司 | 产生聚合物的方法 |
| US7005485B2 (en) * | 1998-12-18 | 2006-02-28 | Chevron Phillips Chemical Company Lp | Process for producing polyolefins |
| US6967230B2 (en) * | 1998-12-18 | 2005-11-22 | Chevron Phillips Chemical Company Lp | Process for producing polyolefins |
| WO2001005842A1 (en) * | 1999-07-15 | 2001-01-25 | Phillips Petroleum Company | Slotted slurry take off |
| DE19948280A1 (de) | 1999-10-06 | 2001-04-12 | Elenac Gmbh | Gasphasenpolymerisationsverfahren |
| JP3772637B2 (ja) * | 2000-04-25 | 2006-05-10 | 双葉電子工業株式会社 | 蛍光体及び蛍光表示管 |
| US6566460B1 (en) | 2000-08-04 | 2003-05-20 | Equistar Chemicals, Lp | Continuous recovery of polymer from a slurry loop reactor |
| DE60129444T2 (de) * | 2001-10-30 | 2007-10-31 | Borealis Technology Oy | Polymerisationsreaktor |
| KR100453190B1 (ko) * | 2001-12-29 | 2004-10-15 | 삼성에스디아이 주식회사 | 표면 처리된 저전압용 형광체 및 그의 제조방법 |
| AU2003270594A1 (en) * | 2002-09-13 | 2004-04-30 | Chevron Phillips Chemical Company Lp | Process and apparatus for reducing take-off valve plugging in a polymerization process |
| CN100482693C (zh) * | 2002-09-13 | 2009-04-29 | 切夫里昂菲利普化学有限责任公司 | 在聚合法中减少取料阀堵塞的方法和设备 |
| EP2275452B1 (en) | 2002-09-17 | 2016-06-08 | Chevron Phillips Chemical Company LP | Improved pumping apparatus and process for slurry polymerization in loop reactors |
| AU2003272448A1 (en) * | 2002-09-17 | 2004-04-08 | Chevron Phillips Chemical Company Lp | Improved pumping apparatus and process for slurry polymerization in loop reactors |
| US20050095176A1 (en) * | 2003-10-31 | 2005-05-05 | Hottovy John D. | Method and apparatus for reducing reactor fines |
| US20050272891A1 (en) * | 2004-02-13 | 2005-12-08 | Atofina Research S.A. | Double loop technology |
| EP1586590A1 (en) * | 2004-02-13 | 2005-10-19 | Total Petrochemicals Research Feluy | Transfer vessel between flash tank and purge column for recovering polymer solids |
| EP1564224A1 (en) * | 2004-02-13 | 2005-08-17 | Total Petrochemicals Research Feluy | Slurry loop reactors |
| EP1765884A1 (en) | 2004-06-21 | 2007-03-28 | ExxonMobil Chemical Patents, Inc., A Corporation of the State of Delaware | Polymerization process |
| WO2006009944A2 (en) * | 2004-06-21 | 2006-01-26 | Exxonmobil Chemical Patents Inc. | Polymerization process |
| WO2006009946A2 (en) * | 2004-06-21 | 2006-01-26 | Exxonmobil Chemical Patents Inc. | Polymerization process |
| ES2704137T3 (es) * | 2004-08-27 | 2019-03-14 | Chevron Phillips Chemical Co Lp | Proceso de poliolefinas energéticamente eficiente |
| US7629421B2 (en) * | 2005-12-21 | 2009-12-08 | Chevron Phillips Chemical Company Lp | Monomer recovery by returning column overhead liquid to the reactor |
| EP1918308A1 (en) | 2006-10-30 | 2008-05-07 | Total Petrochemicals Research Feluy | Process for improving the devolatilization of polymer slurry produced in a polymerization reactor |
| US7999044B2 (en) * | 2008-09-04 | 2011-08-16 | Chevron Phillips Chemical Company Lp | System and method for deinventory of polymerization reactor |
| US8344078B2 (en) | 2010-05-21 | 2013-01-01 | Chevron Phillips Chemical Company Lp | Continuous take off technique and pressure control of polymerization reactors |
| US8703063B2 (en) | 2010-06-21 | 2014-04-22 | Chevron Phillips Chemical Company Lp | System and method for closed relief of a polyolefin loop reactor system |
| US9163564B2 (en) | 2010-06-21 | 2015-10-20 | Chevron Phillips Chemical Company Lp | Method and system for energy generation in a chemical plant by utilizing flare gas |
| US8362161B2 (en) | 2011-04-12 | 2013-01-29 | Chevron Phillips Chemical Company Lp | System and method for processing reactor polymerization effluent |
| US8597582B2 (en) | 2011-06-30 | 2013-12-03 | Chevron Phillips Chemical Company Lp | Flashline heater system and method |
| US9469698B2 (en) | 2014-04-29 | 2016-10-18 | Chevron Phillips Chemical Company Lp | Process for forming polyolefins |
| US10029230B1 (en) | 2017-01-24 | 2018-07-24 | Chevron Phillips Chemical Company Lp | Flow in a slurry loop reactor |
| EP4039349A1 (en) | 2017-04-17 | 2022-08-10 | Chevron Phillips Chemical Company LP | System for processing reactor polymerization effluent |
| CN113329799B (zh) * | 2019-01-25 | 2023-04-25 | 博里利斯股份公司 | 用于从聚合物反应混合物中分离挥发性化合物的分离装置和方法 |
| US11478768B2 (en) | 2019-05-03 | 2022-10-25 | Chevron Phillips Chemical Company Lp | Reactor jacket design |
| US11549748B1 (en) * | 2021-10-26 | 2023-01-10 | Chevron Phillips Chemical Company Lp | Emission free fluff transfer system and integrated nitrogen cycle |
| US20250257021A1 (en) | 2024-02-09 | 2025-08-14 | Chevron Phillips Chemical Company Lp | Fractionation for Polymerized Reactor Effluent |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3195613A (en) * | 1961-10-09 | 1965-07-20 | Phillips Petroleum Co | Method for continuously discharging the contents of a pressurized vessel |
| US3285899A (en) * | 1962-08-30 | 1966-11-15 | Phillips Petroleum Co | Method for continuously discharging the contents of a pressurized vessel |
| US3428619A (en) * | 1965-05-27 | 1969-02-18 | Phillips Petroleum Co | Suspension handling |
| US4222895A (en) * | 1979-05-04 | 1980-09-16 | Dart Industries Inc. | Polyolefin catalyst |
| US4211124A (en) * | 1979-05-30 | 1980-07-08 | The United States Of America As Represented By The Secretary Of The Army | Instrumentation coupling |
| US4424341A (en) * | 1981-09-21 | 1984-01-03 | Phillips Petroleum Company | Separation of solid polymers and liquid diluent |
| US4469560A (en) * | 1982-07-20 | 1984-09-04 | Phillips Petroleum Company | Control of dumping of a reactor |
-
1989
- 1989-08-30 US US07/400,620 patent/US5183866A/en not_active Expired - Lifetime
-
1990
- 1990-06-13 CA CA002018920A patent/CA2018920C/en not_active Expired - Fee Related
- 1990-08-07 MX MX021870A patent/MX171494B/es unknown
- 1990-08-24 KR KR1019900013135A patent/KR0149444B1/ko not_active Expired - Fee Related
- 1990-08-24 JP JP2221461A patent/JP2701968B2/ja not_active Expired - Fee Related
- 1990-08-25 DZ DZ900153A patent/DZ1443A1/fr active
- 1990-08-29 NO NO903784A patent/NO175209C/no unknown
- 1990-08-30 AT AT90116685T patent/ATE122689T1/de not_active IP Right Cessation
- 1990-08-30 DE DE69019439T patent/DE69019439T2/de not_active Expired - Fee Related
- 1990-08-30 EP EP90116685A patent/EP0415427B1/en not_active Expired - Lifetime
- 1990-08-30 HU HU905705A patent/HU209740B/hu not_active IP Right Cessation
- 1990-08-30 ES ES90116685T patent/ES2072340T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2018920C (en) | 1996-07-23 |
| KR0149444B1 (ko) | 1998-10-15 |
| ATE122689T1 (de) | 1995-06-15 |
| HU905705D0 (en) | 1991-03-28 |
| NO903784D0 (no) | 1990-08-29 |
| JPH0393806A (ja) | 1991-04-18 |
| NO903784L (no) | 1991-03-01 |
| EP0415427A3 (en) | 1992-05-06 |
| HUT56588A (en) | 1991-09-30 |
| ES2072340T3 (es) | 1995-07-16 |
| NO175209C (no) | 1994-09-14 |
| MX171494B (es) | 1993-10-29 |
| EP0415427A2 (en) | 1991-03-06 |
| CA2018920A1 (en) | 1991-02-28 |
| DE69019439D1 (de) | 1995-06-22 |
| KR910004678A (ko) | 1991-03-29 |
| HU209740B (en) | 1994-10-28 |
| US5183866A (en) | 1993-02-02 |
| DE69019439T2 (de) | 1995-09-14 |
| EP0415427B1 (en) | 1995-05-17 |
| JP2701968B2 (ja) | 1998-01-21 |
| DZ1443A1 (fr) | 2004-09-13 |
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