CA2803147A1 - Air cooling and purification apparatus intended for a cryogenic air distillation unit - Google Patents
Air cooling and purification apparatus intended for a cryogenic air distillation unit Download PDFInfo
- Publication number
- CA2803147A1 CA2803147A1 CA2803147A CA2803147A CA2803147A1 CA 2803147 A1 CA2803147 A1 CA 2803147A1 CA 2803147 A CA2803147 A CA 2803147A CA 2803147 A CA2803147 A CA 2803147A CA 2803147 A1 CA2803147 A1 CA 2803147A1
- Authority
- CA
- Canada
- Prior art keywords
- bottles
- tower
- building
- cooling
- air
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000000746 purification Methods 0.000 title claims abstract description 19
- 238000004821 distillation Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Appareil de refroidissement et d'épuration d'air destiné à une unité de distillation cryogénique d'air La présente invention est relative à un appareil de refroidissement et d'épuration d'air destiné à une unité de distillation cryogénique d'air.
Dans un appareil de séparation d'air par distillation cryogénique, l'air est comprimé dans un compresseur et ensuite refroidi par échange de chaleur directe avec de l'air dans une tour de refroidissement. L'air refroidi est ensuite io épuré. Les épurations dans les unités de séparation d'air permettent de retirer principalement l'eau et le C02 de l'air avant l'entrée dans l'unité de distillation cryogénique, placée dans une boite froide. Un ensemble de vannes et tuyauteries permettent le transit de l'air à épurer et l'azote impur qui sert à la régénération des bouteilles d'épuration. Cet ensemble de vannes et tuyaux est posé à plat au sol et y présente un encombrement important. Le rapport de la hauteur et la longueur de l'ensemble est proche de 1 Lors de l'installation de cet ensemble de vannes et tuyaux à l'intérieur d'un nouveau bâtiment (pour des raisons de très grand froid ou chaud ou tout autre) il est intéressant de réduire la largeur de cet ensemble pour réduire la largeur du bâtiment à construire. De même pour l'installation de cet ensemble dans un bâtiment existant (plutôt long et pas large) réduire la largeur de cet ensemble tuyauteries et vannes peut aider considérablement.
Un des moyens de réduire la largeur de cet ensemble est, par l'intermédiaire d'une conception des tuyauteries différente, d'allonger cet ensemble. Le rapport entre la hauteur et la largeur de l'ensemble devient très inférieur à 1.
De ce fait, l'entraxe de ces bouteilles d'épuration liées à cet ensemble va aussi s'allonger.
Un appareil selon le préambule de la revendication 1 est décrit dans EP-3o A-1672301.
Selon l'invention, la tour de refroidissement d'air par contact direct avec l'eau est installée entre les deux bouteilles d'épuration.
WO 2012/004125 Apparatus for cooling and purifying air for a unit of cryogenic distillation of air The present invention relates to a cooling apparatus and for purifying air for a cryogenic distillation unit for air.
In an apparatus for separating air by cryogenic distillation, the air is compressed in a compressor and then cooled by heat exchange direct with air in a cooling tower. The cooled air is then I purified. The purges in the air separation units make it possible to remove mainly water and C02 from the air before entering the unit of distillation cryogenic, placed in a cold box. A set of valves and pipelines allow the transit of air to be purified and the impure nitrogen that serves to the regeneration of the purification bottles. This set of valves and pipes is laid flat on the ground and has a large footprint. The report of the height and length of the set is close to 1 When installing this set of valves and pipes inside of a new building (for reasons of extreme cold or heat or anything other) it is interesting to reduce the width of this set to reduce the width of the building to be built. Similarly for the installation of this set in an existing building (rather long and not wide) reduce the width of this together piping and valves can help considerably.
One of the ways to reduce the width of this set is, by through a different piping design, to extend this together. The ratio between the height and the width of the whole becomes very less than 1.
As a result, the spacing of these cleaning bottles related to this set will also lie down.
An apparatus according to the preamble of claim 1 is described in EP-A
3 A-1672301.
According to the invention, the cooling tower of air by direct contact with the water is installed between the two purification bottles.
WO 2012/004125
2 PCT/EP2011/060417 Selon un objet de l'invention, il est prévu un appareil de refroidissement et d'épuration d'un débit d'air comprenant une tour de refroidissement par contact direct avec de l'eau, deux bouteilles d'épuration, ayant chacune un axe vertical, une conduite pour envoyer de l'eau à la tour de refroidissement, une conduite pour envoyer de l'air à la tour de refroidissement, la tour étant disposée entre les deux bouteilles, une conduite pour envoyer de l'air refroidi de la tour aux bouteilles d'épuration et un ensemble de vannes et de tuyaux permettant de relier les deux bouteilles à la tour de refroidissement, caractérisé
en ce que l'appareil comprend un bâtiment, l' ensemble étant situé à
l'intérieur io du bâtiment et les deux bouteilles et la tour étant à l'extérieur du bâtiment, les deux bouteilles et l'ensemble étant placés de part et d'autre d'un mur du bâtiment, les bouteilles étant placés le long du mur .
Selon d'autres caractéristiques facultatives de l'appareil - le centre de la tour vu d'en haut est située sur la ligne médiane entre les centres des deux bouteilles vu d'en haut ;
- les centres des deux bouteilles et de la tour vu d'en haut forment une ligne droite ;
- les centres des deux bouteilles et de la tour vu d'en haute forment un triangle à angle obtus , - le bâtiment contient également au moins un compresseur et/ou au moins une turbine et/ou au moins une colonne à distiller ;
- le rapport entre la dimension de l'ensemble dans le sens vertical et la dimension dans le sens horizontal est inférieur à 1 , - le mur constitue le mur le plus long du bâtiment, le bâtiment étant de section rectangulaire ;
- le rapport entre la longueur du mur et la largeur du bâtiment est supérieur à 2.
Selon un autre objet de l'invention, il est prévu un appareil de séparation d'air comprenant un appareil de refroidissement et d'épuration tel que décrit ci-3o dessus.
L'appareil de séparation d'air peut comprendre un compresseur dans le bâtiment qui est un compresseur d'air relié à la tour de refroidissement et/ou une turbine, dans le bâtiment, qui est une turbine d'air reliée aux bouteilles WO 2012/004125 2 PCT / EP2011 / 060417 According to one object of the invention, there is provided a cooling apparatus and purifying an air flow including a cooling tower by direct contact with water, two purifying bottles, each having a axis vertical, a pipe to send water to the cooling tower, a conduct to send air to the cooling tower, the tower being arranged between the two bottles, a pipe to send air cooled from the tower to the purification bottles and a set of valves and pipes to connect the two bottles to the cooling tower, characterized in that the apparatus comprises a building, the assembly being located at interior io of the building and the two bottles and the tower being outside the building, two bottles and the set being placed on both sides of a wall of building, the bottles being placed along the wall.
According to other optional features of the device - the center of the tower seen from above is located on the median line between the centers of the two bottles seen from above;
- the centers of the two bottles and the tower seen from above form a straight line ;
- the centers of the two bottles and the tower seen from high up an obtuse angle triangle, - the building also contains at least one compressor and / or at least one turbine and / or at least one distillation column;
- the ratio between the dimension of the assembly in the vertical direction and the dimension in the horizontal direction is less than 1, - the wall is the longest wall of the building, the building being rectangular section;
- the ratio of the length of the wall to the width of the building is greater than 2.
According to another object of the invention, there is provided a separation apparatus of air comprising a cooling and purification apparatus as described this-3o above.
The air separation apparatus may comprise a compressor in the building which is an air compressor connected to the cooling tower and / or a turbine, in the building, which is an air turbine connected to the bottles WO 2012/004125
3 PCT/EP2011/060417 d'épuration et/ou une colonne de distillation dans le bâtiment et reliée aux bouteilles d'épuration.
L'invention sera décrite en plus de détail en se référant à la figure. Dans la Figure 1 est illustré un appareil selon l'invention.
L'appareil comprend une tour de refroidissement 1 par contact direct avec de l'eau, deux bouteilles d'épuration 3A, 3B pour épurer l'air en eau et en C02 et un bâtiment 5 contenant au moins un ensemble 7 de tuyaux et de vannes pour permettre l'air provenant de la tour 1 d'être envoyé aux bouteilles 3A, 3B. Certains des tuyaux de l'ensemble 7 traversent le mur 9 du bâtiment 5.
io Le mur 9 est le mur le plus long du bâtiment 5 qui est de section rectangulaire.
Le rapport entre la longueur du mur 9 et la largeur du bâtiment est de préférence supérieur à 2.
Le rapport entre la dimension de l'ensemble 7 dans le sens vertical et la dimension dans le sens horizontal est inférieur à 1.
Les deux bouteilles 3A, 3B et la tour sont disposées le long du mur 9 de sorte que leurs centres vus d'en haut forment une ligne droite parallèle au mur.
La tour est disposée sur la ligne médiane entre les deux bouteilles.
La tour 1 peut être légèrement plus proche ou plus loin du mur 9 que les deux bouteilles 3A, 3B de sorte que les centres de la tour et des deux bouteilles forment un triangle à angle obtus.
Le bâtiment 5 peut également contenir un compresseur et/ou une turbine et/ou une colonne de distillation de l'appareil de séparation d'air dont l'appareil de refroidissement et d'épuration fait partie.
L'appareil de séparation d'air peut comprendre un compresseur dans le bâtiment 5 qui est un compresseur d'air relié à la tour de refroidissement 1 et/ou une turbine, dans le bâtiment 5, qui est une turbine d'air reliée aux bouteilles d'épuration 3A, 3B et/ou une colonne de distillation dans le bâtiment 5 et reliée aux bouteilles d'épuration 3A,3B. 3 PCT / EP2011 / 060417 purification and / or distillation column in the building and connected to purifying bottles.
The invention will be described in more detail with reference to the figure. In Figure 1 is illustrated an apparatus according to the invention.
The apparatus comprises a cooling tower 1 by direct contact with water, two purification bottles 3A, 3B to purify the air with water and in C02 and a building 5 containing at least one set 7 of pipes and valves to allow air from tower 1 to be sent to bottles 3A, 3B. Some of the pipes of the assembly 7 pass through the wall 9 of the building 5.
The wall 9 is the longest wall of the building 5 which is of section rectangular.
The ratio of the length of the wall 9 to the width of the building is preferably greater than 2.
The ratio between the dimension of the assembly 7 in the vertical direction and the dimension in the horizontal direction is less than 1.
The two bottles 3A, 3B and the tower are arranged along the wall 9 of so that their centers seen from above form a straight line parallel to the Wall.
The tower is arranged on the center line between the two bottles.
Tower 1 may be slightly closer to or farther from Wall 9 than two bottles 3A, 3B so that the centers of the tower and both Bottles form an obtuse angle triangle.
Building 5 may also contain a compressor and / or turbine and / or distillation column of the air separation apparatus whose the cooling and purification apparatus is part of it.
The air separation apparatus may comprise a compressor in the building 5 which is an air compressor connected to the cooling tower 1 and / or a turbine, in building 5, which is an air turbine connected to purification bottles 3A, 3B and / or a distillation column in the building 5 and connected to the purification bottles 3A, 3B.
Claims (14)
angle obtus. Apparatus according to claim 1 or 2 wherein the centers of the two bottles (3A, 3B) and the tower (1) seen from above form a triangle to obtuse angle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1055603A FR2962526B1 (en) | 2010-07-09 | 2010-07-09 | APPARATUS FOR COOLING AND PURIFYING AIR FOR A CRYOGENIC AIR DISTILLATION UNIT |
| FR1055603 | 2010-07-09 | ||
| PCT/EP2011/060417 WO2012004125A2 (en) | 2010-07-09 | 2011-06-22 | Air cooling and purification apparatus intended for a cryogenic air distillation unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2803147A1 true CA2803147A1 (en) | 2012-01-12 |
| CA2803147C CA2803147C (en) | 2018-04-17 |
Family
ID=43868145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2803147A Active CA2803147C (en) | 2010-07-09 | 2011-06-22 | Air cooling and purification apparatus intended for a cryogenic air distillation unit |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20130152629A1 (en) |
| EP (1) | EP2591299B1 (en) |
| CN (1) | CN103299146B (en) |
| CA (1) | CA2803147C (en) |
| FR (1) | FR2962526B1 (en) |
| RU (1) | RU2557151C2 (en) |
| UA (1) | UA107597C2 (en) |
| WO (1) | WO2012004125A2 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3143412A (en) * | 1960-11-28 | 1964-08-04 | Dravo Corp | Method of enriching the oxygen content of air supplied to blast furnaces |
| FR2695714B1 (en) * | 1992-09-16 | 1994-10-28 | Maurice Grenier | Installation of cryogenic treatment, in particular of air distillation. |
| FR2706025B1 (en) * | 1993-06-03 | 1995-07-28 | Air Liquide | Air distillation installation. |
| FR2774752B1 (en) * | 1998-02-06 | 2000-06-16 | Air Liquide | AIR DISTILLATION SYSTEM AND CORRESPONDING COLD BOX |
| DE10342788A1 (en) * | 2003-09-15 | 2005-04-07 | Linde Ag | Process engineering plant for handling of application fluid has rectification columns and main heat exchanger located in cold chamber, and at least a section of warm pipes in warm chamber |
| EP1666822A1 (en) * | 2004-12-03 | 2006-06-07 | Linde Aktiengesellschaft | Apparatus for the cryogenic separation of a gaseous mixture in particular of air |
| FR2929385A1 (en) * | 2008-03-28 | 2009-10-02 | Air Liquide | Air separation apparatus for use with distillation column, has unit sending processed air flows coming from exchangers to average or low pressure column without mixing air flows in downstream of exchangers and in upstream of double column |
-
2010
- 2010-07-09 FR FR1055603A patent/FR2962526B1/en not_active Expired - Fee Related
-
2011
- 2011-06-22 CA CA2803147A patent/CA2803147C/en active Active
- 2011-06-22 EP EP11726805.2A patent/EP2591299B1/en active Active
- 2011-06-22 US US13/808,931 patent/US20130152629A1/en not_active Abandoned
- 2011-06-22 WO PCT/EP2011/060417 patent/WO2012004125A2/en active Application Filing
- 2011-06-22 CN CN201180033991.8A patent/CN103299146B/en active Active
- 2011-06-22 UA UAA201300284A patent/UA107597C2/en unknown
- 2011-06-22 RU RU2013105495/06A patent/RU2557151C2/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2591299B1 (en) | 2018-10-17 |
| FR2962526B1 (en) | 2014-07-04 |
| CN103299146A (en) | 2013-09-11 |
| UA107597C2 (en) | 2015-01-26 |
| WO2012004125A2 (en) | 2012-01-12 |
| CA2803147C (en) | 2018-04-17 |
| RU2557151C2 (en) | 2015-07-20 |
| RU2013105495A (en) | 2014-08-20 |
| EP2591299A2 (en) | 2013-05-15 |
| CN103299146B (en) | 2016-02-10 |
| US20130152629A1 (en) | 2013-06-20 |
| FR2962526A1 (en) | 2012-01-13 |
| WO2012004125A3 (en) | 2013-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20160617 |