CA2522031C - Methode de traitement de residus de sables bitumineux a l'aide de chaux ou de chaux et de dioxyde de carbone - Google Patents
Methode de traitement de residus de sables bitumineux a l'aide de chaux ou de chaux et de dioxyde de carbone Download PDFInfo
- Publication number
- CA2522031C CA2522031C CA2522031A CA2522031A CA2522031C CA 2522031 C CA2522031 C CA 2522031C CA 2522031 A CA2522031 A CA 2522031A CA 2522031 A CA2522031 A CA 2522031A CA 2522031 C CA2522031 C CA 2522031C
- Authority
- CA
- Canada
- Prior art keywords
- tailings
- oil sands
- water
- calcium oxide
- blended
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 45
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims description 42
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims description 24
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims description 16
- 239000001569 carbon dioxide Substances 0.000 title claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 title abstract description 7
- 235000011941 Tilia x europaea Nutrition 0.000 title abstract description 7
- 239000004571 lime Substances 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000000605 extraction Methods 0.000 claims abstract description 35
- 239000007787 solid Substances 0.000 claims abstract description 28
- 239000002562 thickening agent Substances 0.000 claims abstract description 23
- 239000010426 asphalt Substances 0.000 claims abstract description 22
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 62
- 239000000920 calcium hydroxide Substances 0.000 claims description 62
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 62
- 239000000292 calcium oxide Substances 0.000 claims description 29
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 12
- 238000005204 segregation Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 18
- 239000000126 substance Substances 0.000 abstract description 13
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 11
- 238000007596 consolidation process Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 abstract description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 60
- 239000003921 oil Substances 0.000 description 48
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 35
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 26
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 21
- 239000004927 clay Substances 0.000 description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 description 18
- 230000008569 process Effects 0.000 description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 description 14
- 239000011734 sodium Substances 0.000 description 13
- 235000017550 sodium carbonate Nutrition 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 9
- 239000002253 acid Substances 0.000 description 9
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 9
- 150000007513 acids Chemical class 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- -1 hydrogen ions Chemical class 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 235000011121 sodium hydroxide Nutrition 0.000 description 7
- 239000007900 aqueous suspension Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 239000003518 caustics Substances 0.000 description 4
- 239000003027 oil sand Substances 0.000 description 4
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000003809 water extraction Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 235000012254 magnesium hydroxide Nutrition 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
- C10G1/045—Separation of insoluble materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/02—General arrangement of separating plant, e.g. flow sheets specially adapted for oil-sand, oil-chalk, oil-shales, ozokerite, bitumen, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
- C10G1/047—Hot water or cold water extraction processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
La présente invention concerne le traitement de résidus de sables bitumineux à l'aide de chaux CaO ou de chaux CaO et de CO2 dans le but d'atteindre une consolidation améliorée sans séparation des solides présents dans les résidus et de récupérer l'eau rejetée présentant des propriétés chimiques acceptables afin de l'utiliser dans le processus d'extraction du bitume. Les résidus sans séparation sont produits à partir d'un mélange de sousverse du cyclone et de sousverse épaississante ou encore d'un mélange de sousverse de cyclone, de sousverse épaississante et de résidus fins mûrs. Cela se fait grâce au traitement du mélange de résidus avec du CaO ou encore du CaO et du CO2, selon des dosages appropriés, avec la production simultanée connexe d'eau rejetée, qui présente des concentrations plus faibles de Ca2+, de Mg2+, de Na+, de Cl- ions, de particules ultrafines et d'espèces organiques colorantes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2522031A CA2522031C (fr) | 2004-10-05 | 2005-10-03 | Methode de traitement de residus de sables bitumineux a l'aide de chaux ou de chaux et de dioxyde de carbone |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2481597 | 2004-10-05 | ||
| CA2,481,597 | 2004-10-05 | ||
| CA2522031A CA2522031C (fr) | 2004-10-05 | 2005-10-03 | Methode de traitement de residus de sables bitumineux a l'aide de chaux ou de chaux et de dioxyde de carbone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2522031A1 CA2522031A1 (fr) | 2006-04-05 |
| CA2522031C true CA2522031C (fr) | 2013-02-19 |
Family
ID=36141721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2522031A Active CA2522031C (fr) | 2004-10-05 | 2005-10-03 | Methode de traitement de residus de sables bitumineux a l'aide de chaux ou de chaux et de dioxyde de carbone |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2522031C (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8480908B2 (en) | 2005-11-09 | 2013-07-09 | Suncor Energy Inc. | Process, apparatus and system for treating a hydrocarbon feedstock |
| US8800784B2 (en) | 2005-11-09 | 2014-08-12 | Suncor Energy Inc. | System, apparatus and process for extraction of bitumen from oil sands |
| US8968580B2 (en) | 2009-12-23 | 2015-03-03 | Suncor Energy Inc. | Apparatus and method for regulating flow through a pumpbox |
| US9016799B2 (en) | 2005-11-09 | 2015-04-28 | Suncor Energy, Inc. | Mobile oil sands mining system |
| WO2019035954A1 (fr) * | 2017-08-18 | 2019-02-21 | Graymont Western Canada Inc. | Traitement de résidus de sables bitumineux avec de la chaux à des niveaux de ph élevés |
| WO2019094620A3 (fr) * | 2017-11-08 | 2019-07-11 | Graymont Western Canada Inc. | Traitement de flux de queues à l'aide d'une ou de plusieurs doses de chaux, et systèmes et procédés associés |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7736501B2 (en) | 2002-09-19 | 2010-06-15 | Suncor Energy Inc. | System and process for concentrating hydrocarbons in a bitumen feed |
| CA2400258C (fr) | 2002-09-19 | 2005-01-11 | Suncor Energy Inc. | Separateur de mousse bitumineuse a plaques inclinees et methode de traitement d'hydrocarbures a l'aide d'un cyclone separateur |
| US7931800B2 (en) | 2007-03-14 | 2011-04-26 | Apex Engineering Inc. | Method for extraction of bitumen from oil sands using lime |
| US9011972B2 (en) | 2008-10-29 | 2015-04-21 | E I Du Pont De Nemours And Company | Treatment of tailings streams |
| CA2874093C (fr) * | 2012-06-21 | 2020-11-03 | Suncor Energy Inc. | Techniques ameliorees de deshydratation de residus fins et epais |
| US20150203385A1 (en) * | 2012-06-21 | 2015-07-23 | Suncore Energy Inc. | Dewatering of thick fine tailings with gas injection and flocculation |
| US20140116946A1 (en) * | 2012-10-26 | 2014-05-01 | SYNCRUDE CANADA LTD. in trust for the owners of the Syncrude Project as such owners of exist now | Use of multivalent inorganic additives |
| MX2021002869A (es) * | 2018-09-11 | 2022-09-05 | Graymont Western Canada Inc | Mejoramiento de las características geotécnicas de relaves por medio de adición de cal. |
-
2005
- 2005-10-03 CA CA2522031A patent/CA2522031C/fr active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8480908B2 (en) | 2005-11-09 | 2013-07-09 | Suncor Energy Inc. | Process, apparatus and system for treating a hydrocarbon feedstock |
| US8800784B2 (en) | 2005-11-09 | 2014-08-12 | Suncor Energy Inc. | System, apparatus and process for extraction of bitumen from oil sands |
| US8968579B2 (en) | 2005-11-09 | 2015-03-03 | Suncor Energy Inc. | System, apparatus and process for extraction of bitumen from oil sands |
| US9016799B2 (en) | 2005-11-09 | 2015-04-28 | Suncor Energy, Inc. | Mobile oil sands mining system |
| US8968580B2 (en) | 2009-12-23 | 2015-03-03 | Suncor Energy Inc. | Apparatus and method for regulating flow through a pumpbox |
| WO2019035954A1 (fr) * | 2017-08-18 | 2019-02-21 | Graymont Western Canada Inc. | Traitement de résidus de sables bitumineux avec de la chaux à des niveaux de ph élevés |
| US11390550B2 (en) | 2017-08-18 | 2022-07-19 | Graymont Western Canada Inc. | Treatment of oil sands tailings with lime at elevated PH levels |
| US11613485B2 (en) | 2017-08-18 | 2023-03-28 | Graymont Western Canada Inc. | Treatment of tailings with lime at elevated PH levels |
| WO2019094620A3 (fr) * | 2017-11-08 | 2019-07-11 | Graymont Western Canada Inc. | Traitement de flux de queues à l'aide d'une ou de plusieurs doses de chaux, et systèmes et procédés associés |
| US11027995B2 (en) | 2017-11-08 | 2021-06-08 | Graymont Western Canada Inc | Treatment of tailings streams with one or more dosages of lime, and associated systems and methods |
| US11618697B2 (en) | 2017-11-08 | 2023-04-04 | Graymont Western Canada Inc. | Treatment of tailings streams with one or more dosages of lime, and associated systems and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2522031A1 (fr) | 2006-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |