CN103638812A - Application method for 1.5Pt/Al2O3-Mn2O3 catalyst - Google Patents

Application method for 1.5Pt/Al2O3-Mn2O3 catalyst Download PDF

Info

Publication number
CN103638812A
CN103638812A CN201310650495.8A CN201310650495A CN103638812A CN 103638812 A CN103638812 A CN 103638812A CN 201310650495 A CN201310650495 A CN 201310650495A CN 103638812 A CN103638812 A CN 103638812A
Authority
CN
China
Prior art keywords
catalyst
mist
reduction
temperature
oxidation
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
Application number
CN201310650495.8A
Other languages
Chinese (zh)
Other versions
CN103638812B (en
Inventor
李新刚
郭丽
闫惠臻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
Original Assignee
Tianjin University
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
Application filed by Tianjin University filed Critical Tianjin University
Priority to CN201310650495.8A priority Critical patent/CN103638812B/en
Publication of CN103638812A publication Critical patent/CN103638812A/en
Application granted granted Critical
Publication of CN103638812B publication Critical patent/CN103638812B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses an application method of a 1.5Pt/Al2O3-Mn2O3 catalyst. The process of eliminating nitrogen oxides in vehicle exhaust by adopting the catalyst comprises the following steps: introducing a gas mixture which contains NO, O2 and N2 into a reactor at a certain temperature and with a certain flow rate and performing oxidation storage; introducing a gas mixture which contains NO, H2 or C3H6 and N2 into the reactor for performing reduction; repeating the step of circulating oxidation storage and reduction. The application method has the advantages of low using temperature, high eliminating efficiency and low cost.

Description

1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst
Technical field
The present invention relates to a kind of 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst, belongs to the nitrogen oxide catalysis technology for eliminating in purifying vehicle exhaust.
Background technology
Lean Burning Technique can significantly reduce the fuel consume of motor vehicle, improves fuel economy, can reduce greenhouse gases CO simultaneously 2discharge.But how under lean burn conditions by nitrogen oxide (NO x, comprise NO and NO 2) effectively elimination become a world-famous puzzle.Especially motor vehicle is when cold start-up, and exhaust gas processing device does not reach initiation temperature, so a large amount of NO xdirectly discharge, causes severe contamination, so the NO of low-temperature cool starting xemission control has also become research emphasis.In order to eliminate the NO in lean-combustion engine discharge x, the NO that Japanese Toyota Company proposed in nineteen ninety-five xstorage and reduction (NSR) technology has obtained fast development, conventional Pt/BaO/Al 2o 3the catalyst of type, but the temperature window of the type catalyst is generally 300
Figure 590743DEST_PATH_IMAGE001
above, activity during low temperature is not good.Due to Mn 2o 3there is good low-temperature oxidation reducing property, in NO selective catalysis reduction reaction, there is higher low temperature active, but to NO xreducing power is not enough.At present, this precious metals pt and Mn 2o 3the NSR catalyst technology combining in actual applications or a blank.
Summary of the invention
The object of the invention is to provide a kind of 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst, vehicle exhaust NO when this catalyst is applied to eliminate cold start-up xprocess in, serviceability temperature is low, good activity and selectivity, efficiency are high.
The present invention is realized by the following technical programs, a kind of 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst, is characterized in that comprising following process:
1) for being filled with particle diameter, be 40 ~ 60 object 1.5Pt/Al 2o 3-Mn 2o 3the reactor of catalyst is 50 ~ 350 in temperature
Figure 185454DEST_PATH_IMAGE001
, take mass velocity as 3.75 * 10 4h -1to reactor, pass into the mist that contains NO composition and be oxidized store nitrogen oxides, oxidation stores 2min, and described mixed gas composition and volume content: NO is 500ppm; O 2be 6.7%; All the other are N 2carrier gas;
2) oxidation is 50 ~ 350 in temperature at once after storing and mass velocity is 3.75 * 10 4h -under condition, to reactor, pass into the mist that contains NO composition and carry out nitrogen oxides reduction, reduction 1min, described mixed gas composition and volume content: NO is 500ppm; H 2for 1000ppm or C 3h 6for 1000ppm; All the other are N 2carrier gas;
3) oxidation storage process and the step 2 of repetitive cycling step 1)) reduction process, circulate 20 times, NO xconversion ratio reaches 100%, N 2selectively reach 98.6%.
The invention has the advantages that and adopt 1.5Pt/Al 2o 3-Mn 2o 3catalyst, eliminates the nitrogen oxide in vehicle exhaust in the mode of storage and reduction, adopts H 2or C 3h 6make reducing agent and just can obtain higher activity at lower temperature, and the price of this catalyst compares Pt/BaO/Al 2o 3catalyst cheaply nearly 50%.
The specific embodiment
Embodiment 1
Adopt the precipitation method to prepare Mn 2o 3, take 15 g Mn (CH 3cOO) 2reagent is dissolved in the deionized water of 100 mL, solution is splashed in 30 min to the (NH of continuous stirring 4) 2cO 3in solution, pH is controlled at 910.Gained sediment is aging 4 h at room temperature, after washing, filter cake are put into 90 after filtration
Figure 619026DEST_PATH_IMAGE001
baking oven in dry 24 h obtain presoma.Then put it in Muffle furnace, with 5 the heating rate of/min is 550
Figure 147276DEST_PATH_IMAGE001
roasting 4 h obtain Mn 2o 3sample.
Sample γ-Al 2o 3in Muffle furnace 600
Figure 448945DEST_PATH_IMAGE001
pretreatment 4h is standby.
According to stoichiometry, take 4 g γ-Al 2o 3, adopt the method for incipient impregnation by 0.752 g Pt (NO 3) 2solution joins γ-Al 2o 3in, after standing 24 h, put into 90
Figure 871836DEST_PATH_IMAGE001
dry 24 h in drying box.By the sample after drying 500
Figure 258955DEST_PATH_IMAGE001
roasting 4 h, obtain Pt/Al 2o 3sample.According to the ratio of Mn:Al=1:1, take 2.62 g Pt/Al 2o 3with 4 g Mn 2o 3sample, puts into ball mill with rotating speed mechanical mixture 5 h of 257r/min, obtains 1.5 wt.% Pt/Al 2o 3+ Mn 2o 3sample, is labeled as 1.5Pt/Al 2o 3-Mn 2o 3.Sample obtains 40 after compressing tablet
Figure 628756DEST_PATH_IMAGE002
the particle 8g of 60 order sizes, standby.
With this catalyst, carry out NO xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 50 that catalyst 400mg inserts internal diameter
Figure 83134DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is as calculated: NO xconversion ratio is 85.3%, N 2be selectively 64.9%, the NO calculating thus xeliminating efficiency is 55.4%.
Embodiment 2
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 100 that catalyst 400mg inserts internal diameter under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 100%, N 2be selectively 57.8%, the NO calculating thus xeliminating efficiency is 57.8%.
Embodiment 3
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 150 that catalyst 400mg inserts internal diameter
Figure 551341DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 100%, N 2be selectively 98.6%, the NO calculating thus xeliminating efficiency is 98.6%.
Embodiment 4
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 200 that catalyst 400mg inserts internal diameter
Figure 724833DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 100%, N 2be selectively 94.6%, the NO calculating thus xeliminating efficiency is 94.6%.
Embodiment 5
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 250 that catalyst 400mg inserts internal diameter
Figure 797832DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 82.3%, N 2be selectively 86.6%, the NO calculating thus xeliminating efficiency is 71.3%.
Embodiment 6
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 300 that catalyst 400mg inserts internal diameter
Figure 765788DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 63.1%, N 2be selectively 91.2%, the NO calculating thus xeliminating efficiency is 57.5%.
Embodiment 7
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 350 that catalyst 400mg inserts internal diameter
Figure 861920DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; H 2for 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 46.3%, N 2be selectively 94.3%, the NO calculating thus xeliminating efficiency is 43.7%.
Embodiment 8
With embodiment 1 method, prepare sample 1.5Pt/Al 2o 3-Mn 2o 3catalyst 400mg, carries out NO to it xstorage and reduction process: be 60 ~ 100 object 1.5Pt/Al by granularity 2o 3-Mn 2o 3it is, in the fixed bed reactors of 4 millimeters, in temperature, to be 200 that catalyst 400mg inserts internal diameter
Figure 635841DEST_PATH_IMAGE001
under, to passing into air speed in fixed bed reactors, be 3.75 * 10 4h -1mist carry out NO xoxidation stores, and this mist volume consists of: NO is 500ppm; O 2be 6.7%; All the other are N 2balance Air, oxidation stores 2min, and switching afterwards passes into mist and reduces, and this mist consists of: NO is 500ppm; Propylene is 1000ppm; All the other are N 2balance Air, reduction 1min, so by storage time and recovery time than be periodically oxidized and reduce cyclic process for 2min:1min, circulate 20 times, NO in continuous gas-monitoring xconcentration with the variation in reaction time, absorption NO xconcentration adopts Model 42i-HL nitrogen-oxide analyzer, (Thermo Scientific, chemiluminescence detector) to detect.Testing result is: NO xconversion ratio is 98.4%, N 2be selectively 53.2%, the NO calculating thus xeliminating efficiency is 52.3%.

Claims (1)

1. a 5Pt/Al 2o 3-Mn 2o 3the application process of catalyst, for eliminating the nitrogen oxide of vehicle exhaust, is characterized in that comprising following process:
1) for being filled with particle diameter, be 60 ~ 100 object 1.5Pt/Al 2o 3-Mn 2o 3the reactor of catalyst is 50-350 in temperature
Figure 2013106504958100001DEST_PATH_IMAGE001
, take mass space velocity as 3.75 * 10 4h -1to reactor, pass into the mist that contains NO composition and be oxidized store nitrogen oxides, oxidation stores 2min, and described mixed gas composition and volume content: NO is 500ppm; O 2be 6.7%; All the other are N 2carrier gas;
2) oxidation is 50-350 in temperature at once after storing
Figure 284048DEST_PATH_IMAGE001
and mass velocity is 3.75 * 10 4h -under condition, to reactor, pass into the mist that contains NO composition and carry out nitrogen oxides reduction, reduction 1min, described mixed gas composition volume content: NO is 500ppm; H 2for 1000ppm or C 3h 6for 1000ppm; All the other are N 2carrier gas;
3) oxidation storage process and the step 2 of repetitive cycling step 1)) reduction process, circulate 20 times, NO xconversion ratio reaches 100%, N 2selectively reach 98.6%.
CN201310650495.8A 2013-12-06 2013-12-06 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst Expired - Fee Related CN103638812B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310650495.8A CN103638812B (en) 2013-12-06 2013-12-06 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310650495.8A CN103638812B (en) 2013-12-06 2013-12-06 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst

Publications (2)

Publication Number Publication Date
CN103638812A true CN103638812A (en) 2014-03-19
CN103638812B CN103638812B (en) 2015-09-30

Family

ID=50244180

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310650495.8A Expired - Fee Related CN103638812B (en) 2013-12-06 2013-12-06 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst

Country Status (1)

Country Link
CN (1) CN103638812B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073855A1 (en) * 2003-02-20 2004-09-02 University Of Iowa Research Foundation Sulfur-tolerant catalysts and related precursors and processes
CN101087651A (en) * 2004-12-22 2007-12-12 日产自动车株式会社 Exhaust gas purification catalyst and method for producing exhaust gas purification catalyst
CN102834165A (en) * 2010-02-01 2012-12-19 约翰逊马西有限公司 Nox absorber catalysts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073855A1 (en) * 2003-02-20 2004-09-02 University Of Iowa Research Foundation Sulfur-tolerant catalysts and related precursors and processes
CN101087651A (en) * 2004-12-22 2007-12-12 日产自动车株式会社 Exhaust gas purification catalyst and method for producing exhaust gas purification catalyst
CN102834165A (en) * 2010-02-01 2012-12-19 约翰逊马西有限公司 Nox absorber catalysts

Also Published As

Publication number Publication date
CN103638812B (en) 2015-09-30

Similar Documents

Publication Publication Date Title
CN101845306B (en) Preparation method and application of Lal-xSrxCoO3 perovskite catalyst
CN107899567B (en) Mesoporous Zr and Ce co-doped SCR catalyst
CN106311318A (en) Oxide and molecular sieve compound catalyst and preparation and application thereof
CN107008490B (en) Oxidation type catalyst for purifying diesel vehicle tail gas and preparation method thereof
CN104722331A (en) Preparation method of Cu-SAPO-44 microporous molecular sieve and application thereof as NH3-SCR catalyst
CN101773780A (en) Method for depriving nitric oxide by plasma cooperating with low-temperature catalytic oxidation NO
CN102188971A (en) Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst
CN103230803B (en) Copper-based cerium-cobalt-lanthanum composite oxide catalyst and preparation method thereof
CN103263925B (en) A kind of preparation method of cerium zirconium base nitric oxide common temperature catalyst
CN104069861A (en) Mesoporous iron-based compound oxide catalyst, preparation method and use thereof to ammonia selective catalytic reduction of nitric oxide
CN105727965B (en) A kind of copper zirconium cerium and titanium compound oxide catalyst and its preparation method for denitrating flue gas
CN101249437B (en) Ternary catalyst of magnalium composite oxides adulterating metallic and manufacture method thereof
CN104971735A (en) Efficient oxidation catalyst for diesel vehicle tail gas purification and preparation method and application thereof
CN105879869A (en) Catalyst used for hydrogen selective reduction of nitric oxide as well as preparation method and application thereof
CN102935362B (en) Method for improving low-temperature activity of coal ash-attapulgite manganese based selective catalytic reduction (SCR) catalyst
CN103721710B (en) A kind of supported Pt catalysts and its preparation method and application
CN108246304A (en) A kind of iron cerium tungsten ternary compound oxides, synthesis and application with high thermal stability
CN103638812B (en) 1.5Pt/Al 2o 3-Mn 2o 3the application process of catalyst
CN103007959A (en) Application of La0.7Sr0.3Col-xPdxO3 catalyst
CN109046324B (en) Medium-low temperature denitration catalyst with mesoporous cerium oxide as carrier and preparation method thereof
CN110756184A (en) Preparation method of cerium-based composite oxide denitration catalyst
CN103028327A (en) Application of La[1-x]SrxCo0.8Fe0.2O3 catalyst
CN103566946B (en) Copper manganese compound nitric oxide normal-temperature catalyst and preparation method thereof
CN101773832A (en) Method for preparing BaFeO3 perovskite catalyst with excellent sulfur resistance for storing nitrogen oxide
CN107930624B (en) Composite catalyst for catalytic combustion of ethyl acetate and preparation method and application thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150930

Termination date: 20201206

CF01 Termination of patent right due to non-payment of annual fee