WO2008020535A1 - Procédé de décomposition de monoxyde de diazote - Google Patents
Procédé de décomposition de monoxyde de diazote Download PDFInfo
- Publication number
- WO2008020535A1 WO2008020535A1 PCT/JP2007/064632 JP2007064632W WO2008020535A1 WO 2008020535 A1 WO2008020535 A1 WO 2008020535A1 JP 2007064632 W JP2007064632 W JP 2007064632W WO 2008020535 A1 WO2008020535 A1 WO 2008020535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nitrous oxide
- equilibrium catalyst
- catalyst
- fcc equilibrium
- fcc
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/30—Silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/906—Catalyst dispersed in the gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/42—Addition of matrix or binder particles
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J29/166—Y-type faujasite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Definitions
- the present invention relates to a method for decomposing nitrous oxide contained in combustion gas or exhaust gas.
- Fluidized bed combustion using coal, heavy oil, petroleum coatas, industrial waste, etc. as fuel is a low-temperature combustion of about 800 ° C, so it is a pollutant gas such as nitric oxide (NO) and nitrogen dioxide (NO). Etc.
- N0 contained in the exhaust gas discharged from the combustion furnace has been reduced to 300
- Patent Document 1 discloses a denitration technique using alumina. However, it is decomposed by nitric oxide and nitrogen dioxide, not nitrous oxide.
- Patent Documents 2 and 3 nitrous oxide decomposition techniques.
- Patent Document 2 uses ⁇ -alumina to decompose nitrous oxide
- Patent Document 3 achieves suppression of emission of nitrous oxide and ⁇ in fluidized bed combustion using a desulfurizing agent and a fluid catalyst.
- Patent Document 1 Japanese Patent Laid-Open No. 63-12328
- Patent Document 2 JP-A-6-123406
- An object of the present invention is to provide a method for decomposing nitrous oxide in combustion gas or exhaust gas discharged from a combustion furnace.
- a nitrous oxide decomposition method that decomposes nitrous oxide by contacting a gas containing nitrous oxide with a fluid catalytic cracking (FCC) equilibrium catalyst.
- FCC fluid catalytic cracking
- Combustion furnace power The nitrous oxide decomposition method according to 1, wherein the exhaust gas is allowed to contact the FCC equilibrium catalyst by passing the exhaust gas discharged through the catalyst layer filled with the FCC equilibrium catalyst.
- a method for decomposing nitrous oxide with an FCC equilibrium catalyst can be provided. For example, by introducing an FCC equilibrium catalyst as a nitrous oxide decomposition catalyst in a fluidized bed combustion furnace, nitrous oxide can be decomposed in the furnace.
- nitrous oxide in the exhaust gas from the combustion furnace can be decomposed by FCC equilibrium catalyst. This can reduce global warming substances and simplify the system, avoid plant remodeling, or reduce plant costs.
- FIG. 1 is a schematic view showing an example of a fluidized bed combustion furnace.
- FIG. 3 is a graph showing the relationship between sample temperature and N 2 O removal rate.
- the nitrous oxide decomposition method of the present invention is characterized in that nitrous oxide is decomposed by contacting a gas containing nitrous oxide with a fluid catalytic cracking (FCC) equilibrium catalyst. To do.
- FCC fluid catalytic cracking
- the FCC equilibrium catalyst is a particulate solid acid catalyst used in the fluid catalytic cracking process of petroleum.
- the present inventors have found that this catalyst has an effect on the decomposition of nitrous oxide.
- it is an FCC equilibrium catalyst in which 500 to 15000 mass ppm of vanadium and / or nickel is accumulated on the particle surface, and an FCC equilibrium catalyst having an accumulation amount of vanadium and / or nickel of 800 to 5000 mass ppm is particularly preferable! /, .
- nitrous oxide is decomposed by bringing a gas containing nitrous oxide into contact with the FCC equilibrium catalyst.
- a gas containing nitrous oxide into contact with the FCC equilibrium catalyst.
- the method for contacting the gas with the FCC equilibrium catalyst there is a method in which a catalyst layer is formed in the gas flow path so that the gas passes through the FCC equilibrium catalyst layer, or an FCC equilibrium catalyst is dropped and brought into contact with the gas existing portion in the combustion furnace.
- Examples of the fluidized bed furnace to which the present invention is applied include a publishing type fluidized bed furnace, a circulating fluidized bed furnace, an internal circulating fluidized bed furnace, a swirling flow type fluidized bed furnace, an atmospheric pressure fluidized bed furnace, and a pressurized fluidized bed furnace. Can be mentioned.
- the fluidized bed may have a fluidized bed in a part of the combustion furnace.
- FIG. 1 is a schematic view showing an example of a fluidized bed combustion furnace.
- This fluidized bed combustion furnace has a fluidized bed 11 and a freeboard section 12 inside the combustion furnace main body 10.
- the fluidized bed 11 is made of powder such as silica sand, limestone, or coal ash, which is a fluidized medium, and flows by an air flow supplied from the lower part of the combustion furnace body 10.
- the powder constituting the fluidized bed 11 is supported by a dispersion plate 13 having a wire mesh shape or a porous plate shape.
- a fuel supply pipe 21 that supplies fuel to the fluidized bed 11 is connected to the combustion furnace body 10.
- solid fuel such as coal, petroleum coatas, plastic fuel, biomass fuel, activated sludge and municipal waste, and liquid fuel such as heavy oil and crude oil are introduced into the furnace.
- An exhaust pipe 22 is connected to the upper part of the combustion furnace main body 10, and exhaust gas generated by combustion is discharged out of the furnace.
- an FCC equilibrium catalyst is used as a fluid medium. That is, the FCC equilibrium catalyst is previously filled into the furnace as a fluid medium. As a result, nitrous oxide contained in the combustion gas can be brought into contact with the FCC equilibrium catalyst.
- the particle size of the FCC equilibrium catalyst may be about several tens of meters, which is usually used, but the particle size adjusted to 10 to 500 m is preferable, and the particle size adjusted to 80-300 ⁇ m is more preferable.
- the FCC equilibrium catalyst may be used by mixing with a normal fluid medium such as silica sand, limestone, or coal ash.
- an FCC equilibrium catalyst may be mixed from the fuel supply pipe 21 together with the above-described desulfurization agent such as fuel and limestone into the furnace.
- the injected FCC equilibrium catalyst stays in the fluidized bed 11 freeboard section 12 and comes into contact with the combustion gas.
- the particle size of the FCC equilibrium catalyst is preferably about 80 to 300 111. When the FCC equilibrium catalyst particle size is small, it mainly stays in the freeboard section 12 (floating state), and when the particle size is large, it mainly stays in the fluidized bed 11.
- the exhaust pipe 22 may be connected to the exhaust gas treatment unit, and a catalyst layer may be formed in the treatment unit or the catalyst may be introduced to bring the catalyst into contact with the exhaust gas.
- the above-described decomposition method of nitrous oxide in exhaust gas is not limited to exhaust gas from a fluidized bed combustion furnace, but also industrial furnaces, heating furnaces, and exhaust gas combustion boilers having a combustion temperature of 600 to 950 ° C. It can also be applied to the production of adipic acid containing nitrous oxide and exhaust gas from automobiles.
- activated alumina it is preferable to use activated alumina together with the FCC equilibrium catalyst.
- the degradation of resolution due to the FCC equilibrium catalyst with too small particle size jumping out of the combustion furnace is suppressed, and active alumina with a large particle size is put into the furnace for active activity. Can compensate for the decline.
- activated alumina ordinary industrial alumina can be used. Preference is given to alumina produced by
- the gas exhaust pipe 5 connected to the upper part of the pipe 1 and the N 2 O component provided in the middle of the gas exhaust pipe 5
- the catalyst layer 7 was formed by filling the FCC equilibrium catalyst into the quartz tube 1 so that the filling length was 200 mm. It should be noted that the upper end of the catalyst layer 7 has a thin quartz wool tank 9a, a key sand layer 8a with a filling length of 30 mm, and a thin quartz wool tank 9a.
- a three-layered packing made of 1 2 is formed to hold and fix the catalyst layer 7.
- N O gas diluted with nitrogen and having a N 2 O concentration of 500 ppm is supplied from the N 2 O gas introduction pipe 3 to the N 2 O gas.
- the N 2 O removal rate was measured by analyzing the N 2 O concentration in the exhaust gas.
- Figure 3 shows a graph showing the relationship between temperature and N 2 O removal rate.
- the FCC equilibrium catalyst shows satisfactory N 2 O decomposition activity at 700-950 ° C.
- FCC equilibration catalyst is satisfactory at fluidized bed combustion temperature condition (700 ⁇ 900 ° C)! /, N O content
- Example 1 instead of FCC equilibrium catalyst, sand (JIS7, particle size 0.2 ⁇ ; 1. Omm particles
- the nitrous oxide decomposition method of the present invention can be suitably applied to fluidized bed combustion systems such as solids such as coal and biomass, sludge, fluidized bed incineration systems, and the like.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008529837A JPWO2008020535A1 (ja) | 2006-08-15 | 2007-07-26 | 亜酸化窒素の分解方法 |
EP07791332A EP2052770A1 (en) | 2006-08-15 | 2007-07-26 | Method for decomposing dinitrogen monoxide |
US12/377,126 US20100196238A1 (en) | 2006-08-15 | 2007-07-26 | Method for decomposing dinitrogen monoxide |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-221414 | 2006-08-15 | ||
JP2006221414 | 2006-08-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008020535A1 true WO2008020535A1 (fr) | 2008-02-21 |
Family
ID=39082061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/064632 WO2008020535A1 (fr) | 2006-08-15 | 2007-07-26 | Procédé de décomposition de monoxyde de diazote |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100196238A1 (ja) |
EP (1) | EP2052770A1 (ja) |
JP (1) | JPWO2008020535A1 (ja) |
KR (1) | KR20090060268A (ja) |
CN (1) | CN101500693A (ja) |
WO (1) | WO2008020535A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010169334A (ja) * | 2009-01-23 | 2010-08-05 | Idemitsu Kosan Co Ltd | N2o排出抑制燃焼装置とn2o排出抑制方法 |
JP2011083714A (ja) * | 2009-10-16 | 2011-04-28 | Idemitsu Kosan Co Ltd | 活性アルミナ触媒及び亜酸化窒素の除去方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009037882A1 (de) * | 2009-01-13 | 2010-07-15 | Linde Aktiengesellschaft | Vorrichtung und Verfahren zur Zersetzung von Lachgas in einem adiabaten Festbettreaktor |
CN111346504A (zh) * | 2018-12-20 | 2020-06-30 | 富利康科技股份有限公司 | 粒状物与一氧化二氮一体去除装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6312328A (ja) | 1986-07-03 | 1988-01-19 | Ebara Corp | 脱硝方法 |
JPH0490826A (ja) * | 1990-08-01 | 1992-03-24 | Agency Of Ind Science & Technol | 排ガス浄化方法 |
JPH06123406A (ja) | 1992-08-28 | 1994-05-06 | Idemitsu Kosan Co Ltd | 燃焼ガスの亜酸化窒素除去方法 |
JP2004082111A (ja) | 2002-06-28 | 2004-03-18 | Idemitsu Kosan Co Ltd | 燃焼装置におけるn2o及びnoxの排出抑制方法 |
JP2006503699A (ja) * | 2002-10-21 | 2006-02-02 | ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット | FCC法に使用されるNOx低減組成物 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523086B2 (ja) * | 1973-03-26 | 1980-06-20 | ||
DE4128629A1 (de) * | 1991-08-29 | 1993-03-04 | Basf Ag | Silberhaltiger traegerkatalysator und verfahren zur katalytischen zersetzung von distickstoffmonoxid |
-
2007
- 2007-07-26 EP EP07791332A patent/EP2052770A1/en not_active Withdrawn
- 2007-07-26 JP JP2008529837A patent/JPWO2008020535A1/ja active Pending
- 2007-07-26 US US12/377,126 patent/US20100196238A1/en not_active Abandoned
- 2007-07-26 KR KR1020097002967A patent/KR20090060268A/ko not_active Application Discontinuation
- 2007-07-26 WO PCT/JP2007/064632 patent/WO2008020535A1/ja active Application Filing
- 2007-07-26 CN CNA2007800292879A patent/CN101500693A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6312328A (ja) | 1986-07-03 | 1988-01-19 | Ebara Corp | 脱硝方法 |
JPH0490826A (ja) * | 1990-08-01 | 1992-03-24 | Agency Of Ind Science & Technol | 排ガス浄化方法 |
JPH06123406A (ja) | 1992-08-28 | 1994-05-06 | Idemitsu Kosan Co Ltd | 燃焼ガスの亜酸化窒素除去方法 |
JP2004082111A (ja) | 2002-06-28 | 2004-03-18 | Idemitsu Kosan Co Ltd | 燃焼装置におけるn2o及びnoxの排出抑制方法 |
JP2006503699A (ja) * | 2002-10-21 | 2006-02-02 | ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット | FCC法に使用されるNOx低減組成物 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010169334A (ja) * | 2009-01-23 | 2010-08-05 | Idemitsu Kosan Co Ltd | N2o排出抑制燃焼装置とn2o排出抑制方法 |
CN102292596A (zh) * | 2009-01-23 | 2011-12-21 | 出光兴产株式会社 | N2o排放抑制燃烧装置及n2o排放抑制方法 |
JP2011083714A (ja) * | 2009-10-16 | 2011-04-28 | Idemitsu Kosan Co Ltd | 活性アルミナ触媒及び亜酸化窒素の除去方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20090060268A (ko) | 2009-06-11 |
JPWO2008020535A1 (ja) | 2010-01-07 |
US20100196238A1 (en) | 2010-08-05 |
CN101500693A (zh) | 2009-08-05 |
EP2052770A1 (en) | 2009-04-29 |
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