SK278196B6 - Production of filtrating agents - Google Patents
Production of filtrating agents Download PDFInfo
- Publication number
- SK278196B6 SK278196B6 SK1892-91A SK189291A SK278196B6 SK 278196 B6 SK278196 B6 SK 278196B6 SK 189291 A SK189291 A SK 189291A SK 278196 B6 SK278196 B6 SK 278196B6
- Authority
- SK
- Slovakia
- Prior art keywords
- diatomite
- weight
- gas stream
- calcination
- diatomites
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000035699 permeability Effects 0.000 claims abstract description 24
- 238000001354 calcination Methods 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical class [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 24
- 229910052906 cristobalite Inorganic materials 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 12
- 229910052742 iron Chemical class 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 6
- 239000011236 particulate material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000000567 combustion gas Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 1
- 150000001342 alkaline earth metals Chemical class 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical class [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 230000001174 ascending effect Effects 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000000047 product Substances 0.000 description 29
- 239000002245 particle Substances 0.000 description 18
- 239000000377 silicon dioxide Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000011324 bead Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 12
- 230000002776 aggregation Effects 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 239000007858 starting material Substances 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000012065 filter cake Substances 0.000 description 8
- 238000005054 agglomeration Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 241000206761 Bacillariophyta Species 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 239000012044 organic layer Substances 0.000 description 4
- 125000001741 organic sulfur group Chemical group 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 241000195493 Cryptophyta Species 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
- 208000019693 Lung disease Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 235000004789 Rosa xanthina Nutrition 0.000 description 1
- 241000109329 Rosa xanthina Species 0.000 description 1
- 201000010001 Silicosis Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- -1 basalt Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9007690A FR2663564B1 (fr) | 1990-06-20 | 1990-06-20 | Procede pour l'obtention d'agents filtrants diatomiques calcines tres permeables exempts de cristobalite, et agents filtrants diatomitiques calcines tres permeables exempts de cristobalite. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SK278196B6 true SK278196B6 (en) | 1996-03-06 |
Family
ID=9397802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SK1892-91A SK278196B6 (en) | 1990-06-20 | 1991-06-20 | Production of filtrating agents |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5179062A (cs) |
| EP (1) | EP0463927B1 (cs) |
| JP (1) | JP3241752B2 (cs) |
| CA (1) | CA2044040C (cs) |
| CZ (1) | CZ280842B6 (cs) |
| DE (1) | DE69101671T2 (cs) |
| DK (1) | DK0463927T3 (cs) |
| ES (1) | ES2051567T3 (cs) |
| FR (1) | FR2663564B1 (cs) |
| IS (1) | IS1695B (cs) |
| SK (1) | SK278196B6 (cs) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2712508B1 (fr) * | 1993-11-19 | 1996-01-05 | Ceca Sa | Procédé pour l'obtention d'agents filtrants diatomitiques à très faible teneur en cristobalite par agglomération avec des liants silicatés ou siliciques et agents filtrants correspondants. |
| US5656568A (en) * | 1995-08-11 | 1997-08-12 | Advanced Minerals Corporation | Highly purified biogenic silica product |
| DE20122792U1 (de) * | 2001-02-13 | 2007-10-11 | Lehmann & Voss & Co. Kg | Filterhilfsmittel |
| DE10235866B4 (de) * | 2002-08-05 | 2005-02-24 | Technische Universität München | Verfahren zur thermischen Behandlung von Kieselgur, thermisch behandelte Kieselgur und Verwendung einer derartigen Kieselgur |
| CN100594052C (zh) * | 2003-11-20 | 2010-03-17 | 空中协会公司 | 排气过滤器和过滤系统 |
| US9725350B2 (en) | 2004-05-19 | 2017-08-08 | Richard L. Lehman | Very low crystalline silica foamed glass and methods of using the same |
| US8916486B2 (en) * | 2004-05-19 | 2014-12-23 | Richard Lehman | Method of reducing the occurrence of crystalline silica in foamed glass by the introduction of chemical additives |
| US20050261121A1 (en) * | 2004-05-19 | 2005-11-24 | Earthstone International Llc | Elimination of crystalline silica from white foam glass by chemical additions |
| US9963373B2 (en) | 2004-05-19 | 2018-05-08 | Earthstone International Llc | Method of reducing the occurrence of crystalline silica in foamed glass by the introduction of chemical additives |
| EP1794226B1 (en) * | 2004-09-28 | 2013-04-24 | Advanced Minerals Corporation | New functional additive in polymers |
| US7524531B2 (en) * | 2005-04-27 | 2009-04-28 | Ferro Corporation | Structured self-cleaning surfaces and method of forming same |
| WO2008030715A2 (en) * | 2006-09-06 | 2008-03-13 | World Minerals, Inc. | Process for roasting diatomaceous earth ore to reduce organic content |
| WO2008131124A1 (en) * | 2007-04-18 | 2008-10-30 | World Minerals, Inc. | Calcined diatomite products with low cristobalite content |
| US20090181848A1 (en) * | 2007-07-06 | 2009-07-16 | Ep Minerals, Llc | Crystalline silica-free diatomaceous earth blended filter aids and methods of manufacturing the same |
| US8084392B2 (en) * | 2007-07-06 | 2011-12-27 | Ep Minerals, Llc | Crystalline silica-free diatomaceous earth filter aids and methods of manufacturing the same |
| WO2009067718A1 (en) * | 2007-11-25 | 2009-05-28 | World Minerals, Inc. | Filter aids made from low permeability diatomites |
| CN102239125A (zh) * | 2008-09-26 | 2011-11-09 | 世界矿物公司 | 含有降低的可溶性金属水平的硅藻土产品、在硅藻土产品中降低可溶性金属水平的工艺及其使用方法 |
| EP2346981B1 (en) * | 2008-10-09 | 2016-04-06 | Imerys Filtration Minerals, Inc. | Diatomaceous earth products, processes for preparing them, and methods of their use |
| WO2010104831A1 (en) | 2009-03-11 | 2010-09-16 | World Minerals, Inc. | Natural amorphous silica filler products |
| RU2427420C1 (ru) * | 2010-02-04 | 2011-08-27 | ГНУ Всероссийский научно-исследовательский институт сельскохозяйственной радиологии и агроэкологии | Способ получения комплексного сорбента |
| FR2958934A1 (fr) | 2010-04-14 | 2011-10-21 | Michel Davidovics | Matrice a base de cristobalite nano-cristalline pour materiau composite fibreux thermostructural |
| MX349820B (es) * | 2010-10-14 | 2017-08-15 | Instituto Nac De Investigaciones Nucleares | Proceso y equipo para tratar residuos de tierras diatomaceas y otros para la obtencion de materiales de construccion. |
| US9095842B2 (en) | 2012-12-13 | 2015-08-04 | Ep Minerals, Llc | Diatomaceous earth filter aid containing a low crystalline silica content |
| MX2015014292A (es) * | 2013-04-11 | 2016-03-03 | Ep Minerals Llc | Productos de tierra de diatomeas de silice cristalina reducida y metodos para la elaboracion de los mismos. |
| ES2875414T3 (es) | 2014-12-19 | 2021-11-10 | Ep Minerals Llc | Productos compuestos de sílice opalina biogénica/perlita expandida |
| WO2016196137A1 (en) * | 2015-06-04 | 2016-12-08 | Imerys Filtration Minerals, Inc. | Compositions and methods for calcining diatomaceous earth with reduced cristobalite and/or reduced beer soluble iron |
| ES2847148T3 (es) * | 2015-10-23 | 2021-08-02 | Ep Minerals Llc | Productos de diatomita calcinada con fundente opalino y método de fabricación |
| US11633713B2 (en) | 2017-01-06 | 2023-04-25 | Ep Minerals, Llc | Ultra-high performance and high purify biogenic silica filtration media |
| CN112573523B (zh) * | 2020-12-07 | 2022-10-28 | 嵊州浙江大学技术转移中心 | 一种硅藻土综合利用方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1717661A (en) * | 1924-10-25 | 1929-06-18 | Calvert Robert | Revivification of used kieselguhr |
| US1756906A (en) * | 1926-05-03 | 1930-04-29 | Celite Corp | Material for use in treatment of liquids |
| US1862825A (en) * | 1928-08-15 | 1932-06-14 | Calco Chemical Co Inc | Method of making sulphur trioxide and catalyst for use in said method |
| US1813916A (en) * | 1929-04-29 | 1931-07-14 | Celite Corp | Production of finely divided material |
| US1985526A (en) * | 1933-08-11 | 1934-12-25 | Dicalite Company | Heat treatment of diatomaceous earth |
| US2470346A (en) * | 1946-04-30 | 1949-05-17 | Great Lakes Carbon Corp | Calcined diatomaceous earth product |
| US3012981A (en) * | 1958-07-01 | 1961-12-12 | Sinclair Refining Co | Wax compositions containing telemeric polyalkyl oxoesters |
| US3993499A (en) * | 1974-10-04 | 1976-11-23 | E. I. Du Pont De Nemours And Company | Process for producing a particulate mullite fibril containing composition |
| US4112129A (en) * | 1977-09-14 | 1978-09-05 | Johns-Manville Corporation | Cooking oil treating system and composition therefor |
| US4325844A (en) * | 1980-05-20 | 1982-04-20 | Manville Service Corporation | Method of preparing diatomite for rapid calcination |
| US4479920A (en) * | 1981-06-29 | 1984-10-30 | Torftech Limited | Apparatus for processing matter in a turbulent mass of particulate material |
| DD266034A1 (de) * | 1987-11-16 | 1989-03-22 | Wtoez Brau & Malzind | Verfahren zum dispersen, strukturbewahrenden korngroessensichernden kalzinieren von kieselgur |
| DE69033420T2 (de) * | 1989-04-07 | 2000-07-20 | Asahi Glass Co. Ltd., Tokio/Tokyo | Keramischer Filter für staubhaltige Gase und Verfahren zu seiner Herstellung |
-
1990
- 1990-06-20 FR FR9007690A patent/FR2663564B1/fr not_active Expired - Lifetime
-
1991
- 1991-06-06 CA CA002044040A patent/CA2044040C/fr not_active Expired - Fee Related
- 1991-06-07 US US07/712,069 patent/US5179062A/en not_active Expired - Lifetime
- 1991-06-18 DE DE69101671T patent/DE69101671T2/de not_active Expired - Lifetime
- 1991-06-18 IS IS3719A patent/IS1695B/is unknown
- 1991-06-18 DK DK91401626.6T patent/DK0463927T3/da active
- 1991-06-18 EP EP91401626A patent/EP0463927B1/fr not_active Expired - Lifetime
- 1991-06-18 ES ES91401626T patent/ES2051567T3/es not_active Expired - Lifetime
- 1991-06-20 JP JP17594291A patent/JP3241752B2/ja not_active Expired - Fee Related
- 1991-06-20 CZ CS911892A patent/CZ280842B6/cs not_active IP Right Cessation
- 1991-06-20 SK SK1892-91A patent/SK278196B6/sk not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US5179062A (en) | 1993-01-12 |
| CS189291A3 (en) | 1992-02-19 |
| FR2663564A1 (fr) | 1991-12-27 |
| CZ280842B6 (cs) | 1996-04-17 |
| ES2051567T3 (es) | 1994-06-16 |
| IS1695B (is) | 1998-08-28 |
| DE69101671T2 (de) | 1994-11-03 |
| CA2044040A1 (fr) | 1991-12-21 |
| IS3719A7 (is) | 1991-12-21 |
| EP0463927B1 (fr) | 1994-04-13 |
| DE69101671D1 (de) | 1994-05-19 |
| EP0463927A1 (fr) | 1992-01-02 |
| CA2044040C (fr) | 2001-08-21 |
| FR2663564B1 (fr) | 1992-10-02 |
| JPH04227008A (ja) | 1992-08-17 |
| DK0463927T3 (da) | 1994-06-06 |
| JP3241752B2 (ja) | 2001-12-25 |
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