WO2006006934A1 - Method and arrangement for impregnating chips - Google Patents
Method and arrangement for impregnating chips Download PDFInfo
- Publication number
- WO2006006934A1 WO2006006934A1 PCT/SE2005/001162 SE2005001162W WO2006006934A1 WO 2006006934 A1 WO2006006934 A1 WO 2006006934A1 SE 2005001162 W SE2005001162 W SE 2005001162W WO 2006006934 A1 WO2006006934 A1 WO 2006006934A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- chips
- impregnation
- vessel
- level
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
Definitions
- the present invention concerns a method according to the introduction to Claim 1.
- a pre-treatment arrangement with a chip bin has been used during conventional manufacture of chemical cellulose pulp in continuous digesters, in which a first heating of the chips by steam to a temperature of 70-80 0 C is preferably carried out.
- a steam-treatment vessel follows the pre-treatment in which the. chips are intensely heated with steam to 110-120 0 C, followed by an impregnating chip chute before the cooking process is established in the digester. This process requires large quantities of steam, not only in the chip bin but also in the steam- treatment vessel.
- - Steam treatment in one or several steps has been used in the chip bin and before the subsequent formation of a slurry of the chips with an impregnation fluid or a transport fluid, as has been mentioned above. The steam treatment has been considered to be totally necessary in order to be able ensure that air and water bound to the chips are expelled, such that the impregnation fluid can fully penetrate the chips and such that air is not drawn into the digestion process with the chips.
- US 3,532,594 shows a combined vessel in which steam treatment and the formation of a slurry take place in a single pressure vessel that is maintained at an excess pressure of 1-2 atmospheres.
- the system was used in a pulp plant in Sweden as early as the 1970s.
- an impregnation fluid is recirculated during the addition of black liquor that maintains the suggested temperature of 105 0 C in a circulation that consists of withdrawal strainer (35) - pump (23) - heat exchanger (25) - outlet/central pipe (19).
- the idea in this case was that all water vapour would be expelled through the superior bed of chips by steam, and that this water vapour could be withdrawn (ventilated) through the outlet 12.
- a powerful heat exchanger (25) was required in this system.
- NCGs malodorous non-condensable gases
- US 5,635,025 shows a system in which chips are fed without a preceding steam treatment into a vessel in the form of a combined chip bin, impregnation vessel and chip chute. Steam treatment of the chips that lie above the fluid level takes place at this location by the addition of steam from a "steam source", as does a simple addition of impregnation fluid in the lower part of the vessel.
- US 6,280,567 shows a further such system in which the chips are fed without preceding steam treatment into an impregnation vessel at atmospheric pressure where the chips are heated by the addition of hot black liquor that maintains a temperature of approximately 130-140 °C.
- the hot black liquor is added just under the fluid level and its pressure is reduced upwards through the bed of chips, after which malodorous expelled gases are ventilated away from the top of the vessel. This generates large quantities of malodorous gases, and these must be processed and destroyed in special systems.
- SE 523850 shows an alternative system in which hot, pressurised black liquor taken directly from the digester at a temperature of 125-140 °C is added to the upper part of the steam-treatment vessel, above the fluid level but under the level of chips, whereby the black liquor whose pressure has been relieved releases large quantities of steam for the steam treatment of the chips that lie above the fluid level established in the vessel.
- a temperature between 140-160 0 C is established in the impregnation vessel in this system. Excess fluid, the black liquor, can in this case be withdrawn from the lower part of the vessel.
- prior art technology has in most cases used steam treatment as a significant part of the heating of the chips, where the steam that is used is either constituted by newly generated steam or by steam that has been obtained following pressure reduction of black liquor from the cooking step.
- This ensures a relatively large flow of steam, with the associated consumption of energy, and it requires a steam-treatment system that can be controlled.
- the steam treatment has also involved the generation of large quantities of malodorous gases, and their generation with a high risk of explosion at certain concentrations.
- WO03106765 shows an arrangement in an attempt to avoid the problems described above that are associated with these solutions.
- Impregnation fluids (BL1/BL2/BL3) are in this case added with increasing temperatures at different positions (P1 , P2, P3), and the establishment of a zone (Z1) of countercurrent flow at the uppermost part of the impregnation vessel.
- the need for steam treatment can in this way be reduced while the amount of expelled weak gases can at the same time be eliminated.
- Most of the volatile compounds in the wood are bound to the withdrawn impregnation fluid (REC).
- the flow upstream towards the withdrawal strainer is to be adapted such that the temperature of the withdrawn material can be maintained at the low value of 30 0 C and that it is in this way possible to avoid evaporation up in the bed of chips.
- This method of operation is well-suited for certain types of wood with a high density (certain eucalyptus woods) and where there is a high level of the superior bed of chips.
- it is difficult under certain operating conditions type of wood and the height of the superior column of chips
- for the chips to sink when the temperature at the fluid level is far too low for the chips to be able to sink in the impregnation fluid.
- the limited steam treatment of the invention allows the implementation of what is known as "cold- top” regulation in the impregnation vessel, which means that the upper surface of the bed of chips maintains what is essentially normal ambient temperature, 15-25 0 C, and that this does not involve the steam continuously expelling non-condensable gases (NCGs) through the bed of chips, which gases otherwise require extraction systems for these harmful and malodorous gases.
- NCGs non-condensable gases
- the principal aim of the present invention is to achieve an improved method and an improved arrangement for the impregnation and heating of chips that have not been steam-treated, which method and arrangement do not display the disadvantages that are associated with other known solutions specified in the description of prior art technology.
- a second aim is to ensure that the chips sink in the impregnation fluid.
- a third aim is to add impregnation fluid to the impregnation vessel in such a quantity and at such a temperature that the temperature that is established at the fluid level is established in the interval 90-115 0 C, preferably in the interval 95-105 0 C.
- a fourth aim is to be able to use a simpler vessel at atmospheric pressure for the impregnation, which would thus not require pressure certification, and in this way reduce the investment costs.
- a further aim is to reduce to an absolute minimum the quantities of additional steam that are required.
- a further aim is to reduce to a minimum the amounts of expelled NCGs and malodorous gases and in this way to reduce the need of or to significantly reduce the capacity of a weak gas management system.
- a further aim with one preferred embodiment is that with the high temperature at the fluid level combined with a withdrawal of fluid at the level of the fluid level it is possible to achieve a controlled evaporation a short distance up in the column of chips that lies above the fluid level, and in this way to expel volatile compounds from the chips.
- An equilibrium condition will be achieved when operation has been established, in which condensate from the limited zone of evaporation will be withdrawn though the withdrawal strainer arranged at the level of the fluid.
- the invention is based on the surprising insight that it is the temperature at the surface of the impregnation fluid in the impregnation vessel that determines whether the chips in an impregnation vessel can manage to sink in the impregnation fluid. It has surprisingly turned out to be the case that if the temperature at the fluid surface lies within a narrow range of temperature, the air in the chip fragments will be expelled to an extent that is fully sufficient for the chips subsequently to be able to sink in the impregnation vessel.
- a lighter and a simpler form of a local steam treatment for a very limited quantity of chips in the column of chips that lies above the fluid surface and in direct connection with the fluid surface is sufficient to achieve the steam treatment that makes it possible for the column of chips to sink.
- Untreated chips will be used in the following detailed description. "Untreated chips” is here used to denote chips that have not passed through any form of pre-treatment by, for example, steam treatment or similar, before the chips are fed into an impregnation vessel to be impregnated.
- fluid level, LICLLEV and "chips level, CH_LEV” will also be used.
- fluid level, LIQ_LEV is here used to denote the level that the impregnation fluid BL added to the impregnation vessel 101 has established in the vessel.
- chips level, CH_LEV is here used to denote the height of that part of the bed of chips (consisting of chips) that is located above the fluid level, LICLLEV.
- FIG. 1 shows an arrangement for the impregnation of chips during the manufacture of chemical pulp.
- the arrangement comprises an essentially cylindrical impregnation vessel 101 arranged vertically, to which untreated chips/non-steamed chips are continuously fed to the top of the impregnation vessel through a feed arrangement, in the form of a small chip bin 102 without steam treatment, and a sluice feed/chip feed 103.
- the temperature at the top 109 of the vessel essentially corresponds to ambient temperature, 15-25 0 C, where steam ST may be added if the ambient temperature falls below normal ambient temperature and in such a quantity that a chip temperature within this interval is established.
- the chips that are fed to the impregnation vessel normally maintain the same temperature as the ambient air temperature ⁇ 5 0 C.
- the chips fed in establish a chips level CH_LEV in the upper part of the impregnation vessel.
- a feed line 108 with impregnation fluid BL is connected to the impregnation vessel in order to establish a fluid level LIQJ-EV consisting of the said impregnation fluid.
- the impregnation fluid is fed directly in in association with the fluid level LIQ_LEV ⁇ 1 meter.
- the impregnation fluid BL is added at the centre of the impregnation vessel and is fed in to the impregnation vessel in such an amount and at such a temperature that the temperature at the fluid level CH_LEV is established within the interval 90- 115 °C and preferably within the interval 95-105 0 C, whereby evaporation of fluid takes place up into the superior bed of chips locally above the fluid level, while at the same time steam is not driven through the superior bed of chips.
- the evaporation up into the superior bed of chips takes place over a distance that does not exceed half of the height of the superior chips level CH_LEV, it is preferable that the evaporation takes place up into the superior bed of chips over a distance that does not exceed 25% of the superior chips level CH_LEV.
- the impregnation fluid BL added is constituted to more than 50% by cooking fluid after use in a cooking zone in a subsequent digester, which impregnation fluid BL has an alkali level of at least 15 g/l.
- the amount of impregnation fluid BL that is added to the vessel 101 lies between 5-10 m 3 /ADT, preferably between 7-9 m 3 /ADT, where "ADT" is an abbreviation for "Air-dry tonne" of pulp.
- the temperature of the impregnation fluid BL in the feed line 108 maintains a temperature of 115-150 0 C and the chips level CHJ-EV lies at least 1-2 meters over the fluid level and preferably 3-5 meters over the fluid level LIQ_LEV, in order to facilitate the sinking of the chips in the impregnation fluid, where the chips are heated.
- a cooling means 111 may be preferably arranged in front of the impregnation vessel 101.
- the cooling means may be an indirect heat exchanger, a pressure-reduction cyclone or other evaporative cooling, or it may be the addition of cold fluid, preferably colder process fluids, alkali or washing filtrate.
- the air present in the chips will be flashed out, and the chips will sink in the impregnation fluid.
- a withdrawal strainer 110 can, in one preferred embodiment, be used in order to withdraw impregnation fluid REC from the impregnation vessel 101, at the level of the fluid level LIQ_LEV.
- the temperature of the material REC withdrawn is measured, and in this case either one of the temperature and the amount of added impregnation fluid BL is adjusted such that the target value desired for the withdrawn material REC is maintained.
- the pressure in the vessel can be adjusted as required through a regulator valve 104 arranged in a ventilation line 105 at the top of the impregnation vessel.
- the ventilation line 105 may open directly into the atmosphere, for the establishment of atmospheric pressure. It is preferable that a pressure at a level of atmospheric pressure is established, or a slight negative pressure down to -0.2 bar (-20 kPa), or a slight excess pressure up to 0.2 bar (20 kPa).
- a ventilating flow SW_AIR sup air
- the impregnated chips are continuously fed out through output means, here in the form of an outlet 107, combined where relevant with a bottom scraper (not shown in the drawing), at the bottom of the impregnation vessel 101.
Landscapes
- Paper (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007521435A JP5193599B2 (en) | 2004-07-15 | 2005-07-14 | Method and apparatus for impregnating chips |
US11/572,106 US7901541B2 (en) | 2004-07-15 | 2005-07-14 | Method and arrangement for impregnating chips |
BRPI0513230-4A BRPI0513230A (en) | 2004-07-15 | 2005-07-14 | chip impregnation method and arrangement |
EP05760061.1A EP1778910B1 (en) | 2004-07-15 | 2005-07-14 | Method for impregnating chips |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0401870-1 | 2004-07-15 | ||
SE0401870A SE0401870D0 (en) | 2004-07-15 | 2004-07-15 | Procedure for impregnating wood chips |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006006934A1 true WO2006006934A1 (en) | 2006-01-19 |
Family
ID=32867250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2005/001162 WO2006006934A1 (en) | 2004-07-15 | 2005-07-14 | Method and arrangement for impregnating chips |
Country Status (6)
Country | Link |
---|---|
US (1) | US7901541B2 (en) |
EP (1) | EP1778910B1 (en) |
JP (1) | JP5193599B2 (en) |
BR (1) | BRPI0513230A (en) |
SE (1) | SE0401870D0 (en) |
WO (1) | WO2006006934A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008174892A (en) * | 2006-12-13 | 2008-07-31 | Metso Fiber Karlstad Ab | Method for producing cellulose pulp in continuous digester in energy-efficient manner |
JP2009133056A (en) * | 2007-11-30 | 2009-06-18 | Metso Fiber Karlstad Ab | Structure and method for continuous steam pretreatment of chips during production of cellulose pulp |
WO2011021968A1 (en) * | 2009-08-19 | 2011-02-24 | Metso Fiber Karlstad Ab | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
WO2011053203A1 (en) * | 2009-10-28 | 2011-05-05 | Metso Paper Sweden Ab | Method and arrangement for steaming and impregnating wood chips in a down flow vessel |
WO2012005643A1 (en) * | 2010-07-09 | 2012-01-12 | Metso Paper Sweden Ab | Method and system for impregnating chips |
WO2012026856A1 (en) * | 2010-08-25 | 2012-03-01 | Metso Paper Sweden Ab | Method, system and withdrawal screen section for impregnating chips |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE526704C2 (en) * | 2003-12-30 | 2005-10-25 | Kvaerner Pulping Tech | Feeding of cellulose chips from a low pressure part to a high pressure part with a lock feeder |
BR112013024451A2 (en) * | 2011-03-25 | 2019-09-24 | Metso Paper Sweden Ab | method and arrangement for adding treatment liquids for cellulose feedstock in a continuous process using down flow vessels |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2803540A (en) * | 1956-03-06 | 1957-08-20 | Condi Engineering Corp | Wood chip digestion |
DE1261387B (en) * | 1964-09-15 | 1968-02-15 | Escher Wyss Gmbh | Device for the continuous impregnation of fibrous materials |
US3532594A (en) * | 1966-09-12 | 1970-10-06 | Kamyr Ab | Method of digesting cellulosic material in steam phase |
US5635025A (en) * | 1994-12-05 | 1997-06-03 | Ahlstrom Machinery Inc. | Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute |
US6280567B1 (en) * | 1997-10-16 | 2001-08-28 | Kvaerner Pulping Ab | System and method for treatment of cellulose-containing material prior to pulp digestion |
WO2003106765A1 (en) * | 2001-12-17 | 2003-12-24 | Kvaerner Pulping Ab | Method and arrangement for impregnating chips |
SE523850C2 (en) * | 1997-09-22 | 2004-05-25 | Kvaerner Pulping Tech | Pre treatment of wood chips in pulp cooking process |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6248208B1 (en) * | 1995-06-02 | 2001-06-19 | Andritz-Ahlstrom Inc. | Pretreatment of chips before cooking |
US6103058A (en) * | 1997-08-07 | 2000-08-15 | Kvaerner Pulping Ab | Method for the continuous cooking of pulp |
SE520956C2 (en) * | 2001-12-05 | 2003-09-16 | Kvaerner Pulping Tech | Continuous boiling with extra residence time for drained liquid outside the boiler |
SE0104247L (en) * | 2001-12-14 | 2002-10-22 | Kvaerner Pulping Tech | Pre-treatment of chips with fresh white liquor before treatment with black liquor |
SE518957C2 (en) * | 2002-01-24 | 2002-12-10 | Kvaerner Pulping Tech | Process for increasing the heating economy of the boiler system during continuous boiling |
-
2004
- 2004-07-15 SE SE0401870A patent/SE0401870D0/en unknown
-
2005
- 2005-07-14 JP JP2007521435A patent/JP5193599B2/en active Active
- 2005-07-14 EP EP05760061.1A patent/EP1778910B1/en active Active
- 2005-07-14 BR BRPI0513230-4A patent/BRPI0513230A/en not_active Application Discontinuation
- 2005-07-14 WO PCT/SE2005/001162 patent/WO2006006934A1/en active Application Filing
- 2005-07-14 US US11/572,106 patent/US7901541B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2803540A (en) * | 1956-03-06 | 1957-08-20 | Condi Engineering Corp | Wood chip digestion |
DE1261387B (en) * | 1964-09-15 | 1968-02-15 | Escher Wyss Gmbh | Device for the continuous impregnation of fibrous materials |
US3532594A (en) * | 1966-09-12 | 1970-10-06 | Kamyr Ab | Method of digesting cellulosic material in steam phase |
US5635025A (en) * | 1994-12-05 | 1997-06-03 | Ahlstrom Machinery Inc. | Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute |
SE523850C2 (en) * | 1997-09-22 | 2004-05-25 | Kvaerner Pulping Tech | Pre treatment of wood chips in pulp cooking process |
US6280567B1 (en) * | 1997-10-16 | 2001-08-28 | Kvaerner Pulping Ab | System and method for treatment of cellulose-containing material prior to pulp digestion |
WO2003106765A1 (en) * | 2001-12-17 | 2003-12-24 | Kvaerner Pulping Ab | Method and arrangement for impregnating chips |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008174892A (en) * | 2006-12-13 | 2008-07-31 | Metso Fiber Karlstad Ab | Method for producing cellulose pulp in continuous digester in energy-efficient manner |
JP2009133056A (en) * | 2007-11-30 | 2009-06-18 | Metso Fiber Karlstad Ab | Structure and method for continuous steam pretreatment of chips during production of cellulose pulp |
EP2467533A4 (en) * | 2009-08-19 | 2013-11-20 | Metso Paper Sweden Ab | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
WO2011021968A1 (en) * | 2009-08-19 | 2011-02-24 | Metso Fiber Karlstad Ab | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
CN102639785B (en) * | 2009-08-19 | 2015-06-10 | 维美德公司 | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
US8801898B2 (en) | 2009-08-19 | 2014-08-12 | Valmet Ab | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
EP2467533A1 (en) * | 2009-08-19 | 2012-06-27 | Metso Paper Sweden AB | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
WO2011053203A1 (en) * | 2009-10-28 | 2011-05-05 | Metso Paper Sweden Ab | Method and arrangement for steaming and impregnating wood chips in a down flow vessel |
RU2515518C1 (en) * | 2010-07-09 | 2014-05-10 | Метсо Пейпер Свиден Аб | Method and system of chip impregnation |
US8795468B2 (en) | 2010-07-09 | 2014-08-05 | Valmet Ab | Method and system for impregnating chips |
WO2012005643A1 (en) * | 2010-07-09 | 2012-01-12 | Metso Paper Sweden Ab | Method and system for impregnating chips |
CN103069072A (en) * | 2010-08-25 | 2013-04-24 | 美卓造纸机械(瑞典)公司 | Method, system and withdrawal screen section for impregnating chips |
US8647469B2 (en) | 2010-08-25 | 2014-02-11 | Metso Paper Sweden Ab | Method, system and withdrawal screen section for impregnating chips |
WO2012026856A1 (en) * | 2010-08-25 | 2012-03-01 | Metso Paper Sweden Ab | Method, system and withdrawal screen section for impregnating chips |
CN103069072B (en) * | 2010-08-25 | 2015-05-20 | 维美德公司 | Method, system and withdrawal screen section for impregnating chips |
Also Published As
Publication number | Publication date |
---|---|
EP1778910B1 (en) | 2014-11-26 |
US20080093041A1 (en) | 2008-04-24 |
EP1778910A4 (en) | 2010-08-11 |
JP5193599B2 (en) | 2013-05-08 |
EP1778910A1 (en) | 2007-05-02 |
SE0401870D0 (en) | 2004-07-15 |
US7901541B2 (en) | 2011-03-08 |
JP2008506862A (en) | 2008-03-06 |
BRPI0513230A (en) | 2008-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1778910B1 (en) | Method for impregnating chips | |
US5080755A (en) | Process for the continuous digestion of cellulosic fiber material | |
US7615134B2 (en) | Method and arrangement of impregnating chips | |
FI82079C (en) | Foerfarande och anordning Foer kontinuerlig kokning av Cellulosa | |
EP2591165B1 (en) | Method and system for impregnating chips | |
US20110067828A1 (en) | Continuous digester system | |
EP2609248B1 (en) | Method, system and withdrawal screen section for impregnating chips | |
US5192396A (en) | Process for the continuous digestion of cellulosic fiber material | |
US8801898B2 (en) | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels | |
EP3114274B1 (en) | Method and arrangement for generating steam at a digesterplant of a chemical pulp mill | |
US3801431A (en) | Method and apparatus for continuous pretreatment of wooden chips | |
EP0662169B1 (en) | A process for the continuous digestion of cellulosic fiber material | |
US5529661A (en) | Process for controlling the flow of cellulosic fiber material through an impregnation vessel | |
JP6329705B2 (en) | Cost-effective kraft cooking using polysulfide cooking liquor | |
SE2150125A1 (en) | Indirect heating of digester | |
SE545465C2 (en) | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels | |
WO2011053203A1 (en) | Method and arrangement for steaming and impregnating wood chips in a down flow vessel |
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 BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007521435 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2005760061 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2005760061 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11572106 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: PI0513230 Country of ref document: BR |