WO2003040847A1 - Dispositifs limitant le noyage dans des reacteurs gaz-liquide - Google Patents

Dispositifs limitant le noyage dans des reacteurs gaz-liquide Download PDF

Info

Publication number
WO2003040847A1
WO2003040847A1 PCT/US2002/033415 US0233415W WO03040847A1 WO 2003040847 A1 WO2003040847 A1 WO 2003040847A1 US 0233415 W US0233415 W US 0233415W WO 03040847 A1 WO03040847 A1 WO 03040847A1
Authority
WO
WIPO (PCT)
Prior art keywords
column
monolith
inlet
stack
liquid
Prior art date
Application number
PCT/US2002/033415
Other languages
English (en)
Inventor
Achim Heibel
Joshua A. Jamison
Original Assignee
Corning Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US10/012,789 external-priority patent/US20030086846A1/en
Application filed by Corning Inc. filed Critical Corning Inc.
Publication of WO2003040847A1 publication Critical patent/WO2003040847A1/fr

Links

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
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B01J10/007—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor in the presence of catalytically active bodies, e.g. porous plates
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/2485—Monolithic reactors
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32255—Other details of the sheets
    • B01J2219/32258—Details relating to the extremities of the sheets, such as a change in corrugation geometry or sawtooth edges
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32296—Honeycombs
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/332—Details relating to the flow of the phases
    • B01J2219/3325—Counter-current flow

Definitions

  • the present invention relates generally to devices and methods for expanding the operating window of multiphase reactors or gas-liquid contactors operated under countercurrent flow conditions.
  • Gas-liquid contactors include devices such as distillation columns, strippers, saturators, absorbers, evaporative coolers, heaters or other devices widely used in industry for the purpose of exchanging mass or energy between gas and liquid phases in fluid processing streams.
  • Multiphase reactors or gas-liquid contactors operated under countercurrent flow conditions are typically required to be free of flooding for a specified operating window, i.e., a specified range of gas and liquid flow rates.
  • Flooding refers to a phenomenon by which gas moving in one direction in a packed column entrains liquid moving in the opposite direction in the packed column. Flooding is undesirable because it can cause a large pressure drop across the packed column as well as other effects that are detrimental to the performance and stability of the reactor.
  • the operating window can be expanded by enhancing the countercurrent flow characteristics at the inlet and/or outlet of the packed column.
  • the following discussion examines monolith reactors and various methods used in enhancing countercurrent flow characteristics at the inlet and/or outlet of the monolith.
  • Monoliths such as employed as packing elements in monolithic reactors comprise a large assembly of thin, parallel, straight channels through which fluids, i.e., gas and liquid, can flow.
  • the number of channels in relation to the cross-sectional area of the monoliths is referred to as cell density.
  • the cross-section of the channels can be of any arbitrary shape, such as square, rectangular, triangular, hexagonal, circular, etc. Longitudinal fins may also be incorporated in the walls of the channels to increase the surface area of the channels.
  • Monoliths are typically extruded from a ceramic material such as cordierite but may also be manufactured from metal.
  • the walls of the monolith channels may be coated with a porous washcoat containing an active catalyst.
  • an active catalyst may be incorporated into the walls of the monolith channels.
  • fluids containing reactants flow through the monolith channels.
  • the reactants react in the presence of the active catalyst, and the products of the reaction are transported out of the monolith channels.
  • liquid slugs are transported upward, which results in a large pressure drop across a monolith bed.
  • Flooding is mostly introduced at the inlet and outlet of the monolith bed as well as in stacking zones between monolith segments. At lower liquid velocities, the flow phenomena at the outlet end of the monolith bed tend to dominate.
  • the effects near the inlet end of the monolith bed gains significance.
  • the liquid entering a monolith channel can form a bridge between walls adjacent to the channel, thereby blocking the inlet of the channel.
  • Figure 1 shows liquid 52 forming a bridge between walls 54, 56.
  • a bridge formed between walls 54, 56 will block the inlet of the channel 58 and prevent gas 59 from flowing through the inlet of the channel 58. This may result in higher gas flow rates in channel 58 and may lead to flooding further downstream in the reactor.
  • the geometry of the monolith reactor is such that flooding is avoided for the operating window of the monolith reactor. However, a channel geometry that avoids flooding may not provide the desired reaction performance.
  • the invention relates to a device for extending a flooding limit of a packed column in a multiphase reactor or gas liquid contactor. More particularly the invention relates to a device positioned at the inlet to the column bed comprising one or a plurality (stack) of monolith(s) or other inlet structures with open passages oriented towards the main flow direction of the liquid into the column, and the use of such a device to expand the flooding limit of the packed column.
  • These flood-limiting devices preferably have large openings (e.g. channels with a large effective channel diameter) at the top of the structure or stack, more particularly top openings having a larger effective channel hydraulic diameter than that of the packing in the column.
  • the devices retard the onset of flooding due to inlet effects and raise the typical flooding point of the bed itself.
  • the effective channel hydraulic diameter is gradually or step-wise reduced within the device toward the typical hydrodynamic dimensions (effective channel hydraulic diameters) of the column packing, which for the case of a honeycomb monolith packing corresponds to the hydraulic diameters of the honeycomb monolith channels, and for the case of pellet, bead or other packed bed designs the characteristic hydraulic length dimensions of the tortuous flow path. .
  • these devices are characterized by a high void fraction to maximize the volume for the fluid phases, and are typified by a channeled structure that decreases in channel cross-section and thus effective hydraulic diameter in the direction of fluid flow in a manner that prevents bridging of the fluid at the inlet of the packed column for a predetermined range of fluid velocities.
  • a stack of monolithic honeycomb segments that increases in cell density and decreases in channel cross-section (and thus effective channel hydraulic diameter) in the direction of liquid flow into the stack is a typical device.
  • the invention in another aspect, relates to a countercurrent reactor which comprises a packed column and a flood limiting device comprising one or a plurality (stack) of monolith segments or other channeled structures mounted at an inlet of the packed column through which a fluid can be conveyed into the packed column.
  • the openings or channels in the stack will have a decreasing hydraulic diameter in the direction of fluid flow and prevents bridging of the fluid at the inlet of the packed column for a predetermined operating window of the reactor.
  • the invention relates to a method for expanding a flooding limit of a packed column which comprises passing a fluid through a flood limiting device comprising one or a plurality (stack) of monolith segments or other channeled structures mounted at an inlet of the packed column, the device having a decreasing hydraulic diameter into an inlet of the packed column.
  • Figure 1 shows liquid bridging at the inlet of a monolith channel.
  • Figure 2 shows a flood limiting device according to an embodiment of the invention mounted at an inlet end of a monolithic reactor or gas-liquid contactor bed.
  • Figure 3 shows an enlarged view of the flood limiting device of Figure 2.
  • Figure 4 shows a monolith bed incorporating a flood limiting device at the outlet end as well as at the inlet end of a monolithic reactor or contactor bed.
  • Figure 5 shows an enlarged view of a typical outlet device to limit outlet-induced flooding mounted at the outlet end of the monolith bed of Figure 4.
  • Figure 6A shows a monolith bed without a flood limiting device mounted at its inlet end
  • Figure 6B shows a monolith bed including a flood limiting device mounted at its inlet end;
  • Figure 7 shows flooding limits as a function of superficial gas and liquid velocities for the monolith reactor configurations shown in Figures 6A and 6B.
  • Embodiments of the invention provide an inlet device that improves the flooding performance of a reactor (or contactor) operated under countercurrent flow conditions.
  • the inlet device when mounted at an inlet end of a packed column, prevents bridging effects at the inlet end of the packed column, thereby preventing flooding at the inlet end of the packed column and expanding the operating window of the reactor.
  • an outlet device similar in structure to the inlet device but with the direction of hydraulic diameter change reversed, can also be mounted at an outlet end of the packed column to assist in draining fluid out of the packed column, such an outlet device acting to suppress flooding that might otherwise originating at the outlet end of the packed column.
  • the particular geometry of the inlet device selected for use in accordance with the invention will of course depend in part on the geometry and flow characteristics of the underlying reactor or contactor bed(s). Hydraulic diameters monolith beds will typically range from about 1 to about 20 mm, with a void fractions of from 20-85% depending upon the thickness of the walls separating the monolith channels. For packed bead or pellet beds, typical equivalent particle diameters will be from about 1 to about 10 mm with a void fraction from 30-50%. For either of these reactor or contactor beds, hydraulic diameters of from 2 to 50 mm for the top layer of the inlet device, with void fractions of from 40-95% for that layer, will be suitable.
  • FIG. 2 shows a reactor 2 incorporating an embodiment of the invention.
  • the reactor 2 includes a reactor housing 4 inside which is disposed a column packing consisting of monolith bed 8.
  • the monolith bed 8 has a plurality of channels 10 through which fluids can flow.
  • the walls of the channels 10 may be coated with a porous oxide (washcoat) containing catalytic species, or catalytic species may be incorporated directly into the walls of the channels 10.
  • Longitudinal fins (not shown) may also be incorporated in the walls of the channels 10 to increase the surface area of the channels 10.
  • a liquid distributor 12 mounted above the column packing e.g., monolith bed 8) distributes a liquid reactant 16 into the channels 10 in the monolith bed 8.
  • liquid distributors include, but are not limited to, sparger pipe, sieve tray, trough, picket-fence weir, bubble cap, spray nozzle, shower head, and overflow tube type.
  • the liquid reactant 16 flows down the channels 10 as a wavy liquid film.
  • a gaseous reactant 18 is introduced below the monolith bed 8 through one or more ports 20 in the reactor housing 4.
  • the gaseous reactant 18 flows up through the cores of the channels 10.
  • the byproducts of the reaction between the liquid reactant 16 and the gaseous reactant 18 can be discharged from the reactor housing 4 through the ports 22 and 24.
  • a flood limiting inlet device 60 is positioned above the monolith bed 8 to prevent the bridging effects at the inlet end 61 of the monolith bed 8.
  • Figure 3 shows an enlarged view of one example of such an inlet device 60, the device in this case consisting of a stack 62 of monolithic honeycomb segments 64, 66.
  • the monolith stack 62 includes two or more monolith segments (or segments of other structures with open channels in the direction of fluid flow,) although a single monolith segment may also be used.
  • the monolith segments 64, 66 have a plurality of channels 68, 70, respectively, through which fluids can flow.
  • the dimensions and shapes of the channels 68, 70 are such that they have limited flow capacity in a non-flooded regime of the monolith bed (8 in Figure 2).
  • the monolith segments 64, 66 have different cell densities, where cell density is the number of channels per cross-section area of the monolith segment.
  • the monolith segment 64 at the top of the stack 62 has a larger channel diameter than the monolith segment 66 at the bottom of the stack 62.
  • the monolith in the stack should have a high voidage.
  • the monolith segment 64 at the top of the stack 62 has a higher open frontal area than the monolith segment 66 at the bottom of the stack 62.
  • the effective channel hydraulic diameter of the flood-limiting device decrease in the direction of liquid flow into the reactor or contactor, i.e., increase up the stack 62 in the direction shown by the arrow 72.
  • the channel diameter increase up the stack 62 is gradual.
  • the channel diameter of the monolith segment 64 at the bottom of the stack 62 may be the same or may be larger than the channel diameter of the monolith bed (8 in Figure 2).
  • the inlet device 60 may be integrated in a support grid (not shown) used to fix the monolith bed (8 in Figure 2) in the reactor housing (4 in Figure 2).
  • the upper and lower surfaces of the monolith segments 64, 66 are such that the monolith segments 64, 66 make full contact with each other when stacked together.
  • the inlet device 60 prevents bridging effects, i.e., blocking of channels 10, that can cause flooding at the inlet 61 of the monolith packing 8 and further downstream the monolith packing 8.
  • FIG. 4 shows an example of this embodiment wherein an optional outlet flooding limit expander ("outlet device") 26 is positioned below the monolith packing 8 to assist in draining liquid out of the monolith packing 8.
  • Figure 5 shows an enlarged view of a suitable outlet device 26.
  • the outlet device 26 includes a monolith stack 28 having monolith segments 30, 32, 34.
  • the monolith stack 28 includes two or more monolith segments, although a single monolith segment may also be used.
  • the monolith segments 30, 32, 34 have a plurality of channels 36, 38, 40, respectively, through which fluid can flow, and the monolith segments 30, 32, 34 have different cell densities, with the hydraulic diameter of the channels in the monolith segment 32 is larger than the hydraulic diameter of the channels in the monolith segment 30, and the hydraulic diameter of the channels in the monolith segment 34 is larger than the hydraulic diameter of the channels in the monolith segment 32 so that the channel diameter will increase in the direction in which liquid flows out of the packed column, i.e., down the stack, as shown by the arrow 37.
  • the hydraulic diameter of the channels in the monolith segment 30 at the top of the stack 28 may be the same or may be larger than the hydraulic diameter of the channels in the monolith packing (8 in Figure 4).
  • the use of such outlet devices is not limited to this particular device, and any of a variety of other designs including any of those disclosed in copending commonly assigned U.S. patent application Serial No. 10/012789 filed November 5, 2001, entitled “Monolith Stacking Configuration For Improved Flooding" and expressly incorporated by reference herein, may alternatively be employed for this purpose.
  • the device consists of a stack of monolithic honeycomb segments that is particularly effective for expanding column flooding limits near the upper liquid flow capacity of the column.
  • FIG. 6A shows a reactor configuration A which includes an inlet device 80 mounted at an inlet end of a monolith reactor bed 83.
  • the reactor also comprises an outlet device 82 mounted at its outlet end, although the use of such an outlet device is entirely optional.
  • the inlet device 80 includes monolith segments 84, 86.
  • the outlet device 82 includes monolith segments 90, 92, 94.
  • the length and cell densities of the monoliths are indicated on the drawing.
  • Figure 6B shows a reactor configuration B which includes only the outlet device 80 at the outlet end of the monolith bed 83, i.e., there is no inlet device at the inlet end of the monolith bed 83.
  • Figure 7 shows flooding limits as a function of superficial gas and liquid velocities for the reactor configurations A and B shown in Figures 6A and 6B, respectively.
  • the results clearly show the improvement in flooding performance at higher liquid velocities when a flood limiting device is used at the inlet end of the monolith bed.
  • both configurations behave similarly, indicating that liquid entrance phenomena do not dominate in this flow regime.
  • the invention provides a number of distinct advantages for the operation of most reactors or gas-liquid contactors of known design.
  • a monolith stack or other flood-limiting device such as described tends to decouple the flooding performance of the monolith bed or other packing used in the reactor or contactor from the reactive performance of the packing. This allows for more flexibility in selecting the appropriate geometry for the packing which will enhance the reactive performance of the reactor or contactor.
  • An optional outlet device can be used to further improve the flooding performance of a monolith bed in a reactor or gas-liquid contactor if desired. Both inlet and outlet devices can also be used with non-monolithic counter-current reactors or contactors, such as packed beds and other structured packings.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un appareil qui permet de limiter le noyage d'une colonne garnie. L'appareil comprend une pile (62) de segments monolithiques (64, 66) présentant plusieurs canaux (68, 70). Les segments monolithiques (64, 66) sont empilés dans l'ordre décroissant du diamètre des canaux dans le sens de l'écoulement du liquide (72) vers l'intérieur de la colonne. Le diamètre des canaux qui augmente en direction du sommet de la pile (72) augmente effectivement le diamètre des canaux d'admission de la colonne.
PCT/US2002/033415 2001-11-05 2002-10-18 Dispositifs limitant le noyage dans des reacteurs gaz-liquide WO2003040847A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/012,789 2001-11-05
US10/012,789 US20030086846A1 (en) 2001-11-05 2001-11-05 Monolith stacking configuration for improved flooding
US10/184,363 US20030086847A1 (en) 2001-11-05 2002-06-26 Flood-limiting devices for gas-liquid reactors
US10/184,363 2002-06-26

Publications (1)

Publication Number Publication Date
WO2003040847A1 true WO2003040847A1 (fr) 2003-05-15

Family

ID=26683994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/033415 WO2003040847A1 (fr) 2001-11-05 2002-10-18 Dispositifs limitant le noyage dans des reacteurs gaz-liquide

Country Status (1)

Country Link
WO (1) WO2003040847A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026058A1 (fr) * 2009-08-31 2011-03-03 Corning Incorporated Distributeurs de fluide de réacteur à film tombant et procédés correspondants

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414201A (en) * 1993-10-27 1995-05-09 The University Of Akron Combined sorbent/catalyst system
US5660800A (en) * 1992-04-15 1997-08-26 Amoco Corporation Emissions control system and method
EP1216751A1 (fr) * 2000-12-20 2002-06-26 Corning Incorporated Réacteur de monolithes eplilés et procédé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660800A (en) * 1992-04-15 1997-08-26 Amoco Corporation Emissions control system and method
US5414201A (en) * 1993-10-27 1995-05-09 The University Of Akron Combined sorbent/catalyst system
EP1216751A1 (fr) * 2000-12-20 2002-06-26 Corning Incorporated Réacteur de monolithes eplilés et procédé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026058A1 (fr) * 2009-08-31 2011-03-03 Corning Incorporated Distributeurs de fluide de réacteur à film tombant et procédés correspondants
CN102481545A (zh) * 2009-08-31 2012-05-30 康宁股份有限公司 降膜式反应器流体分配器和方法

Similar Documents

Publication Publication Date Title
US10500581B1 (en) Separation method and assembly for process streams in component separation units
US3466151A (en) Fluid exchange column
US5632962A (en) Process vessel
US3612494A (en) Gas-liquid contact apparatus
KR100966844B1 (ko) 제트 충돌 열전달 반응기
US7052000B2 (en) Liquid distributor and method for operating the same
US20160250616A1 (en) Structured packing for gas-liquid mass transfer unit
JP2012050970A5 (ja) 気液接触装置用規則充填物
RU2416461C1 (ru) Пакетная вихревая насадка для тепло- и массообменных колонных аппаратов
MX2011009726A (es) Metodo y dispositivo para la purificacion de fluidos.
US20030086847A1 (en) Flood-limiting devices for gas-liquid reactors
CN105771873A (zh) 一种高效传质的规整填料
WO2003040847A1 (fr) Dispositifs limitant le noyage dans des reacteurs gaz-liquide
US20030086845A1 (en) Catalytic reactor
CN111617729B (zh) 逆流连续接触单元和逆流连续接触装置
CN215389327U (zh) 一种催化剂填料及其结构
Dmitrieva et al. Effective designs of structured packings for heat and mass exchange processes
RU2292947C1 (ru) Регулярная переточная насадка и массообменная колонна с этой насадкой
SU1162463A1 (ru) Регул рна насадка
CN213555448U (zh) 一种低压降、低雾沫夹带的高性能波纹导向浮阀及其塔板
SU1327897A1 (ru) Тепломассообменный аппарат
CN113413863A (zh) 波纹规整填料
SU1042780A1 (ru) Многоканальна секционированна насадочна колонна
RU2055627C1 (ru) Массообменная колонна с низким гидравлическим сопротивлением
JPS6159761B2 (fr)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP