FI112040B - Menetelmä typpioksidia ja rikkidioksidia sisältävän kaasun puhdistamiseksi typpioksidista - Google Patents
Menetelmä typpioksidia ja rikkidioksidia sisältävän kaasun puhdistamiseksi typpioksidista Download PDFInfo
- Publication number
- FI112040B FI112040B FI941454A FI941454A FI112040B FI 112040 B FI112040 B FI 112040B FI 941454 A FI941454 A FI 941454A FI 941454 A FI941454 A FI 941454A FI 112040 B FI112040 B FI 112040B
- Authority
- FI
- Finland
- Prior art keywords
- gas
- nitric oxide
- sulfur dioxide
- alkali metal
- oxygen
- Prior art date
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims description 187
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims description 84
- 238000000034 method Methods 0.000 title claims description 37
- 239000007789 gas Substances 0.000 claims description 107
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 36
- 229910052760 oxygen Inorganic materials 0.000 claims description 36
- 239000001301 oxygen Substances 0.000 claims description 36
- 229910052783 alkali metal Inorganic materials 0.000 claims description 30
- -1 alkali metal bicarbonate Chemical class 0.000 claims description 24
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 19
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 17
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- 238000000746 purification Methods 0.000 claims description 12
- 150000001340 alkali metals Chemical class 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 21
- 239000003546 flue gas Substances 0.000 description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000003570 air Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- ZMCUDHNSHCRDBT-UHFFFAOYSA-M caesium bicarbonate Chemical compound [Cs+].OC([O-])=O ZMCUDHNSHCRDBT-UHFFFAOYSA-M 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentaoxide Chemical compound [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 description 2
- LZDSILRDTDCIQT-UHFFFAOYSA-N dinitrogen trioxide Chemical compound [O-][N+](=O)N=O LZDSILRDTDCIQT-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RFSDQDHHBKYQOD-UHFFFAOYSA-N 6-cyclohexylmethyloxy-2-(4'-hydroxyanilino)purine Chemical compound C1=CC(O)=CC=C1NC1=NC(OCC2CCCCC2)=C(N=CN2)C2=N1 RFSDQDHHBKYQOD-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229940097156 peroxyl Drugs 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 231100001234 toxic pollutant Toxicity 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9112097 | 1991-09-30 | ||
| FR9112097A FR2681795B1 (fr) | 1991-09-30 | 1991-09-30 | Procede pour epurer un gaz contenant de l'oxyde nitrique et du dioxyde de soufre. |
| PCT/EP1992/002172 WO1993006915A1 (fr) | 1991-09-30 | 1992-09-18 | Procede pour epurer un gaz contenant de l'oxyde nitrique et du dioxyde de soufre |
| EP9202172 | 1992-09-18 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI941454L FI941454L (fi) | 1994-03-29 |
| FI941454A0 FI941454A0 (fi) | 1994-03-29 |
| FI112040B true FI112040B (fi) | 2003-10-31 |
Family
ID=9417494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI941454A FI112040B (fi) | 1991-09-30 | 1994-03-29 | Menetelmä typpioksidia ja rikkidioksidia sisältävän kaasun puhdistamiseksi typpioksidista |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US5540902A (cs) |
| EP (1) | EP0606268B1 (cs) |
| JP (1) | JPH06510944A (cs) |
| KR (1) | KR100236882B1 (cs) |
| AR (1) | AR247112A1 (cs) |
| AT (1) | ATE146696T1 (cs) |
| AU (1) | AU665781B2 (cs) |
| BR (1) | BR9206567A (cs) |
| CA (1) | CA2119639C (cs) |
| CZ (1) | CZ285444B6 (cs) |
| DE (1) | DE69216246T2 (cs) |
| DK (1) | DK0606268T3 (cs) |
| ES (1) | ES2097923T3 (cs) |
| FI (1) | FI112040B (cs) |
| FR (1) | FR2681795B1 (cs) |
| GR (1) | GR3022925T3 (cs) |
| HU (1) | HU213844B (cs) |
| NO (1) | NO301966B1 (cs) |
| PL (1) | PL170298B1 (cs) |
| RU (1) | RU2076772C1 (cs) |
| WO (1) | WO1993006915A1 (cs) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724328B1 (fr) * | 1994-09-09 | 1997-01-10 | Solvay | Composition reactive et procede pour l'epuration d'un gaz contenant de l'oxyde nitrique |
| RU2138324C1 (ru) * | 1998-06-10 | 1999-09-27 | Научно-технический центр "Экосорб" Ассоциации "Космонавтика-человечеству" | Способ очистки отходящих газов от so2 и nox |
| RU2140810C1 (ru) * | 1998-07-21 | 1999-11-10 | Акционерное общество открытого типа "Всероссийский теплотехнический научно-исследовательский институт (ВТИ)" | Способ очистки продуктов горения от оксидов азота с одновременным кондиционированием дымовых газов перед электрофильтром |
| US7531154B2 (en) | 2005-08-18 | 2009-05-12 | Solvay Chemicals | Method of removing sulfur dioxide from a flue gas stream |
| AT502375B1 (de) * | 2006-02-28 | 2007-03-15 | Voest Alpine Ind Anlagen | Verfahren zur behandlung von abgas aus sinter- und pelletanlagen |
| FR2934790B1 (fr) * | 2008-08-08 | 2011-11-18 | Lab Sa | Procede et installation d'epuration de fumees de combustion contenant des oxydes d'azote |
| WO2012164072A1 (en) | 2011-06-01 | 2012-12-06 | Solvay Chemicals, Inc. | Sodium bicarbonate product with excellent flowability and its method of manufacture |
| US20150314155A1 (en) | 2012-12-05 | 2015-11-05 | Solvay Sa | Treatment of Sodic Fly Ash for Reducing the Leachability of Selenium Contained Herein |
| TW201609222A (zh) | 2014-06-04 | 2016-03-16 | 首威公司 | 使用水溶性矽酸鹽源和含有鈣和／或鎂的材料穩定含鈉粉煤灰 |
| EP3152491A4 (en) | 2014-06-04 | 2018-08-01 | Solvay Sa | Stabilization of sodic fly ash of type f using calcium-based material |
| US10766782B2 (en) | 2015-09-23 | 2020-09-08 | Solvay Sa | Production of crystalline sodium bicarbonate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH462359A (de) * | 1966-06-29 | 1968-09-15 | Bbc Brown Boveri & Cie | Verfahren zum Betrieb eines thermischen Kraftwerkes |
| DK450781A (da) * | 1981-10-12 | 1983-04-13 | Niro Atomizer As | Fremgangsmaade til fjernelse af nitrogenoxider og svovloxider fra spildgasser |
| AT382089B (de) * | 1985-04-05 | 1987-01-12 | Waagner Biro Ag | Verfahren und einrichtung zur reinigung von mit staeuben und schadgasen verunreinigten abgasen |
| US4783325A (en) * | 1985-05-14 | 1988-11-08 | Jones Dale G | Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases |
| EP0301272A3 (de) * | 1987-07-29 | 1990-12-05 | Waagner-Biro Aktiengesellschaft | Verfahren und Vorrichtung zur Abgas- oder Abluftreinigung |
| US5002741A (en) * | 1989-11-16 | 1991-03-26 | Natec Resources Inc. | Method for SOX /NOX pollution control |
| US5165902A (en) * | 1991-07-31 | 1992-11-24 | Research Cottrell, Inc. | Method and apparatus for reducing nitrogen dioxide emissions in a dry sodium scrubbing process using humidification |
-
1991
- 1991-09-30 FR FR9112097A patent/FR2681795B1/fr not_active Expired - Fee Related
-
1992
- 1992-09-18 RU RU9294018218A patent/RU2076772C1/ru not_active IP Right Cessation
- 1992-09-18 CA CA002119639A patent/CA2119639C/fr not_active Expired - Fee Related
- 1992-09-18 PL PL92302920A patent/PL170298B1/pl not_active IP Right Cessation
- 1992-09-18 DE DE69216246T patent/DE69216246T2/de not_active Expired - Fee Related
- 1992-09-18 WO PCT/EP1992/002172 patent/WO1993006915A1/fr active IP Right Grant
- 1992-09-18 JP JP5506578A patent/JPH06510944A/ja active Pending
- 1992-09-18 DK DK92919553.5T patent/DK0606268T3/da active
- 1992-09-18 BR BR9206567A patent/BR9206567A/pt not_active IP Right Cessation
- 1992-09-18 AT AT92919553T patent/ATE146696T1/de not_active IP Right Cessation
- 1992-09-18 AU AU25635/92A patent/AU665781B2/en not_active Ceased
- 1992-09-18 KR KR1019940700993A patent/KR100236882B1/ko not_active Expired - Fee Related
- 1992-09-18 US US08/211,081 patent/US5540902A/en not_active Expired - Lifetime
- 1992-09-18 HU HU9400896A patent/HU213844B/hu not_active IP Right Cessation
- 1992-09-18 ES ES92919553T patent/ES2097923T3/es not_active Expired - Lifetime
- 1992-09-18 EP EP92919553A patent/EP0606268B1/fr not_active Expired - Lifetime
- 1992-09-18 CZ CZ94750A patent/CZ285444B6/cs not_active IP Right Cessation
- 1992-09-28 AR AR92323285A patent/AR247112A1/es active
-
1994
- 1994-03-29 NO NO941156A patent/NO301966B1/no not_active IP Right Cessation
- 1994-03-29 FI FI941454A patent/FI112040B/fi active
-
1997
- 1997-03-26 GR GR970400611T patent/GR3022925T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO301966B1 (no) | 1998-01-05 |
| KR100236882B1 (ko) | 2000-01-15 |
| AU665781B2 (en) | 1996-01-18 |
| US5540902A (en) | 1996-07-30 |
| DK0606268T3 (da) | 1997-06-16 |
| NO941156L (no) | 1994-03-29 |
| FI941454L (fi) | 1994-03-29 |
| CZ75094A3 (en) | 1994-12-15 |
| DE69216246D1 (de) | 1997-02-06 |
| CZ285444B6 (cs) | 1999-08-11 |
| EP0606268B1 (fr) | 1996-12-27 |
| FI941454A0 (fi) | 1994-03-29 |
| FR2681795A1 (fr) | 1993-04-02 |
| NO941156D0 (no) | 1994-03-29 |
| AR247112A1 (es) | 1994-11-30 |
| RU2076772C1 (ru) | 1997-04-10 |
| JPH06510944A (ja) | 1994-12-08 |
| HU9400896D0 (en) | 1994-06-28 |
| ES2097923T3 (es) | 1997-04-16 |
| HUT67831A (en) | 1995-05-29 |
| GR3022925T3 (en) | 1997-06-30 |
| BR9206567A (pt) | 1995-10-17 |
| PL170298B1 (pl) | 1996-11-29 |
| WO1993006915A1 (fr) | 1993-04-15 |
| DE69216246T2 (de) | 1997-07-10 |
| FR2681795B1 (fr) | 1993-11-19 |
| ATE146696T1 (de) | 1997-01-15 |
| CA2119639A1 (fr) | 1993-04-15 |
| EP0606268A1 (fr) | 1994-07-20 |
| AU2563592A (en) | 1993-05-03 |
| CA2119639C (fr) | 2002-04-16 |
| HU213844B (en) | 1997-11-28 |
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