CA1140329A - Process for the removal and economic utilization of the residue from furnace waste-gas in conjunction with waste products - Google Patents
Process for the removal and economic utilization of the residue from furnace waste-gas in conjunction with waste productsInfo
- Publication number
- CA1140329A CA1140329A CA000353617A CA353617A CA1140329A CA 1140329 A CA1140329 A CA 1140329A CA 000353617 A CA000353617 A CA 000353617A CA 353617 A CA353617 A CA 353617A CA 1140329 A CA1140329 A CA 1140329A
- Authority
- CA
- Canada
- Prior art keywords
- alpha
- sulphate hemihydrate
- waste
- sulphate
- washers
- 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
Links
- 239000002912 waste gas Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002699 waste material Substances 0.000 title claims description 7
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract description 41
- 239000000654 additive Substances 0.000 claims abstract description 23
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 14
- 239000004571 lime Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000019738 Limestone Nutrition 0.000 claims abstract description 8
- 239000006028 limestone Substances 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims description 14
- 239000010881 fly ash Substances 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 10
- 239000004295 calcium sulphite Substances 0.000 claims description 10
- 235000010261 calcium sulphite Nutrition 0.000 claims description 10
- 229910052602 gypsum Inorganic materials 0.000 claims description 10
- 239000010440 gypsum Substances 0.000 claims description 10
- 239000002956 ash Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000010811 mineral waste Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000274177 Juniperus sabina Species 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- VCSZKSHWUBFOOE-UHFFFAOYSA-N dioxidanium;sulfate Chemical compound O.O.OS(O)(=O)=O VCSZKSHWUBFOOE-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- PMHURSZHKKJGBM-UHFFFAOYSA-N isoxaben Chemical compound O1N=C(C(C)(CC)CC)C=C1NC(=O)C1=C(OC)C=CC=C1OC PMHURSZHKKJGBM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000063 preceeding effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- QVJDRNBLHGWWNG-UHFFFAOYSA-N sulfurous acid dihydrate Chemical compound O.O.S(=O)(O)O QVJDRNBLHGWWNG-UHFFFAOYSA-N 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2923545.8 | 1979-06-09 | ||
| DE2923545A DE2923545C2 (de) | 1979-06-09 | 1979-06-09 | Verfahren zur Beseitigung und wirtschaftlichen Verwertung des Rückstandes aus der Abgaswäsche von Feuerungen in Verbindung mit Abfallprodukten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140329A true CA1140329A (en) | 1983-02-01 |
Family
ID=6072943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000353617A Expired CA1140329A (en) | 1979-06-09 | 1980-06-09 | Process for the removal and economic utilization of the residue from furnace waste-gas in conjunction with waste products |
Country Status (11)
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8108846A (pt) * | 1980-10-21 | 1982-09-21 | Metallgesellschaft Ag | Processo para a deposicao sem prejuizos de substancias residuais |
| DE3113501A1 (de) * | 1981-04-03 | 1982-12-16 | Rigips GmbH, 3452 Bodenwerder | Gipsmischung zur herstellung von gipskartonplatten und verfahren zur herstellung derselben |
| DE3114555C2 (de) * | 1981-04-10 | 1984-12-13 | Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen | Verwendung eines hydraulisch abbindenden Mehrkomponenten-Gemisches |
| FR2504912A1 (fr) * | 1981-05-02 | 1982-11-05 | Hoelter H | Masses a projeter pour consolider le terrain fraichement creuse, de preference pour les galeries de mines |
| DE3204908A1 (de) * | 1982-02-12 | 1983-10-13 | Steag Ag, 4300 Essen | Moertel mindestens bestehend aus einem calciumsulfathalbhydrat und flugasche und verfahren zur herstellung des moertels |
| DE3205148C2 (de) * | 1982-02-13 | 1984-03-15 | Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen | Hydraulisch abbindendes Mehrkomponenten-Gemisch als Ausbau- und Versatzmaterial im Grubenbetrieb |
| DE3232078C2 (de) * | 1982-08-28 | 1986-04-24 | Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen | Verwendung der Rückstandsfeststoffe der trockenen Rauchgasentschwefelung als Baustoff zur Verfüllung von Untertageräumen im Bergbau |
| DE3232079C2 (de) * | 1982-08-28 | 1986-05-22 | Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen | Verwendung von Rückstandsgips und trockenem Rückstand einer naß bzw. trocken arbeitenden Rauchgasentschwefelungsanlage |
| NL8204052A (nl) * | 1982-10-20 | 1984-05-16 | Pelt & Hooykaas | Samenstelling. |
| DE3442926C1 (de) * | 1984-11-24 | 1985-07-25 | Saarbergwerke AG, 6600 Saarbrücken | Verfahren zum pneumatischen Fördern einer zu verblasenden feinstkörnigen Baustoffmischung auf Gipsbasis von übertage zum Einsatz nach untertage |
| DE3704731C3 (de) * | 1986-02-20 | 1993-12-02 | Hoelter Heinz | Flotationsbergeversatz |
| DE3612931A1 (de) * | 1986-04-17 | 1987-10-22 | Hoelter Heinz | Bergbaumoertel aus abfallbergen der kohlegewinnung |
| DE3811325A1 (de) * | 1988-04-02 | 1989-10-12 | Hoelter Heinz | Zuschlagsstoff fuer den bergbau-bergeversatz |
| DE3843625C3 (de) * | 1988-06-24 | 1998-05-20 | Pro Mineral Ges | Verfahren zur Herstellung von nach dem Anmachen mit Wasser schnellerstarrenden, hydraulischen Bindemittelmischungen mit einstellbar hoher Frühfestigkeit und definierter Wasserfestigkeit der daraus hergestellten erhärteten Massen |
| DE3827612A1 (de) * | 1988-08-13 | 1990-02-15 | Viktor Dr Ing Gobiet | Baustoff fuer die verwendung im untertagebetrieb |
| US5337824A (en) * | 1993-06-28 | 1994-08-16 | Shell Oil Company | Coal slag universal fluid |
| US5439056A (en) * | 1993-06-28 | 1995-08-08 | Shell Oil Company | Coal slag solidification of drilling fluid |
| FI945805L (fi) * | 1993-12-16 | 1995-06-17 | Sicowa Verfahrenstechnik Fuet | Sideaine sisärappauslaastia varten |
| DE19522704A1 (de) * | 1995-06-22 | 1997-01-02 | Abb Research Ltd | Verfahren zum Aufbereiten von Schlacke und/oder Filterstaub aus Müllverbrennungsanlagen |
| NZ507156A (en) * | 1998-03-20 | 2002-04-26 | Anglo Operations Ltd | Method of producing a thickened slimes fraction blended with a tailings fraction |
| GB2497574B (en) * | 2011-12-15 | 2019-10-02 | Saint Gobain Placo Sas | A method of forming a gypsum based product |
| US9162180B1 (en) * | 2013-03-12 | 2015-10-20 | Mississippi Lime Company | Industrial waste heat recovery and concurrent pollution control through the unique application of an underground limestone mine |
| CN104948227B (zh) * | 2015-05-29 | 2017-03-08 | 天地科技股份有限公司 | 一种煤矿井下洗选工艺双系统布置方法 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2492212A (en) * | 1945-01-25 | 1949-12-27 | United States Gypsum Co | Methods for sealing earth formations and an earth sealing plug suitable therefor |
| US3582376A (en) * | 1968-09-09 | 1971-06-01 | Western Co Of North America | Quick-setting cement composition containing portland cement,alpha gypsum and a dispersant |
| US3500934A (en) * | 1968-09-09 | 1970-03-17 | Us Interior | Fly ash injection method and apparatus |
| DE2002570A1 (de) * | 1969-02-20 | 1970-09-10 | Zementkombinat Dessau Inst Fue | Verfahren zur Herstellung von Erzeugnissen aus CaSO4-Bindemitteln und Industrieanfallstoffen |
| BE756667A (nl) * | 1969-09-26 | 1971-03-01 | Geelen Hendrik E Van | Werkwijze voor het bereiden van alpha-calciumsulfaathalfhydraat |
| BE758894A (fr) * | 1969-11-14 | 1971-04-16 | Knauf Westdeutsche Gips | Procede d'erection de maconneries dans les exploitations souterraines et platre pour la mise en oeuvre de ce procede |
| CA952326A (en) * | 1970-06-02 | 1974-08-06 | Bernard T. O'loughlin | Forming self-supporting barriers in mine passages and the like |
| US3859799A (en) * | 1973-01-23 | 1975-01-14 | Dravo Corp | Landfill disposal of power plant wastes |
| DE2400350A1 (de) * | 1974-01-04 | 1975-07-17 | Heinz Hoelter | Verfahren zur umwandlung von rueckstaenden aus dem rauchgas von kraftwerken, vorzugsweise kohlekraftwerken |
| SU648717A1 (ru) * | 1974-10-07 | 1979-02-28 | Уральский научно-исследовательский и проектный институт медной промышленности "УНИПРОМЕДЬ" | Закладочный раствор |
| US3927719A (en) * | 1975-04-25 | 1975-12-23 | Us Interior | Remote sealing of mine passages |
| US4108677A (en) * | 1975-09-04 | 1978-08-22 | Valiga Richard E | Process for treating waste sludge from combustion plant desulfurization units and cementitious product of the process |
| DE2603699C2 (de) * | 1976-01-31 | 1977-12-08 | Ruhrkohle AG; Steag AG; 4300 Essen | Verfahren zur Beseitigung des Rückstandes der Abgaswäsche von Feuerungen, insbesondere von Steinkohlenkraftwerken |
| GB1538102A (en) * | 1976-09-15 | 1979-01-10 | Ici Ltd | Calcium sulphate hemihydrate plaster |
| DE2803764C2 (de) * | 1978-01-28 | 1983-02-10 | Saarbergwerke AG, 6600 Saarbrücken | Verfahren zur Reinigung von Kohlefeuerungsabgasen |
| DE2833382B2 (de) * | 1978-07-29 | 1980-10-23 | Saarbergwerke Ag, 6600 Saarbruecken | Verfahren zur Verwertung des in Rauchgasentschwefelungsanlagen, die auf Kalkbasis betrieben werden, anfallenden Gipses |
-
1979
- 1979-06-09 DE DE2923545A patent/DE2923545C2/de not_active Expired
-
1980
- 1980-06-03 AU AU58983/80A patent/AU534471B2/en not_active Ceased
- 1980-06-04 SU SU802931566A patent/SU1246901A3/ru active
- 1980-06-04 ES ES492141A patent/ES8100908A1/es not_active Expired
- 1980-06-06 DE DE8080103141T patent/DE3063670D1/de not_active Expired
- 1980-06-06 JP JP7565180A patent/JPS55165181A/ja active Granted
- 1980-06-06 EP EP19800103141 patent/EP0021180B1/de not_active Expired
- 1980-06-06 US US06/156,933 patent/US4441840A/en not_active Expired - Lifetime
- 1980-06-07 PL PL1980224808A patent/PL128685B1/pl unknown
- 1980-06-09 CA CA000353617A patent/CA1140329A/en not_active Expired
- 1980-06-09 ZA ZA00803423A patent/ZA803423B/xx unknown
- 1980-06-09 CS CS804055A patent/CS229634B2/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL224808A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1981-03-27 |
| ES492141A0 (es) | 1980-12-16 |
| JPS55165181A (en) | 1980-12-23 |
| DE3063670D1 (en) | 1983-07-14 |
| CS229634B2 (en) | 1984-06-18 |
| US4441840A (en) | 1984-04-10 |
| AU5898380A (en) | 1980-12-11 |
| EP0021180B1 (de) | 1983-06-08 |
| SU1246901A3 (ru) | 1986-07-23 |
| EP0021180A1 (de) | 1981-01-07 |
| DE2923545C2 (de) | 1986-08-28 |
| PL128685B1 (en) | 1984-02-29 |
| DE2923545A1 (de) | 1980-12-18 |
| ZA803423B (en) | 1981-06-24 |
| AU534471B2 (en) | 1984-02-02 |
| JPS633675B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1988-01-25 |
| ES8100908A1 (es) | 1980-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |