CN105883799A - Method for improving activity of activated carbon - Google Patents

Method for improving activity of activated carbon Download PDF

Info

Publication number
CN105883799A
CN105883799A CN201610259705.4A CN201610259705A CN105883799A CN 105883799 A CN105883799 A CN 105883799A CN 201610259705 A CN201610259705 A CN 201610259705A CN 105883799 A CN105883799 A CN 105883799A
Authority
CN
China
Prior art keywords
activated carbon
temperature
activity
acid
improves method
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
CN201610259705.4A
Other languages
Chinese (zh)
Other versions
CN105883799B (en
Inventor
葛洪
易飞舟
张龙
赵永宽
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.)
GUIZHOU ANKAIDA INDUSTRIAL Co Ltd
Original Assignee
GUIZHOU ANKAIDA INDUSTRIAL Co Ltd
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 GUIZHOU ANKAIDA INDUSTRIAL Co Ltd filed Critical GUIZHOU ANKAIDA INDUSTRIAL Co Ltd
Priority to CN201610259705.4A priority Critical patent/CN105883799B/en
Publication of CN105883799A publication Critical patent/CN105883799A/en
Application granted granted Critical
Publication of CN105883799B publication Critical patent/CN105883799B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/21—Attrition-index or crushing strength of granulates

Landscapes

  • Carbon And Carbon Compounds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention relates to the technical field of activated carbon modification, in particular to a method for improving activity of activated carbon. Through an activation oxidization effect on the activated carbon, the activity of the activated carbon is pretreated; after a pore-forming agent and the solvent are made into a solution, the solution is used to treat an acidified material, so that the pore volume of the activated carbon can be increased, the specific surface area of the activated carbon is increased; further, in a vacuum environment, low temperature and constant temperature treatment is performed, warming high-temperature treatment is performed, so that the abrasion resistance of the activated carbon is fixed, the specific surface area is stabilized, the activity of the activated carbon is improved, and the quality of the activated carbon is improved.

Description

A kind of activated carbon activity improves method
Technical field
The present invention relates to activated carbon modified technical field, especially a kind of activated carbon activity raising side Method.
Background technology
Activated carbon is one of conventional adsorbent, in food hygiene, medical treatment, catalysis, space division In nitrogen processed, oven gas, the aspect such as recovery of hydrogen is widely used, and its absorption property is very It is decided by its pore property in big degree.The distribution of pores of activated carbon is three decentralized, the most greatly Hole, mesopore and micropore all account for certain proportion.But, this three dispersion molded breadth distributions of activated carbon Aperture structure so that the activity of activated carbon presents different states, and then to a certain extent Constrain the activated carbon application in some field.Therefore, along with society's need to Special adsorbent Ask increase, improve the activity of activated carbon so that specific surface area, the pore volume of activated carbon is changed Conduct oneself well reason, to reach to improve the activity of activated carbon, become the main think of of activated carbon product research Road.
But, in prior art, the activity improvement for activated carbon is the activity for inactivation mostly Charcoal, or after the activated carbon of the half inactivation composition that carries out adsorbing in activated carbon capillary removes, make Obtain its activity to be improved, and document is not carried out for activated carbon or activated carbon raw material itself After modification so that the technical literature that the activity of activated carbon is improved is open.
Summary of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention provides a kind of activity Carbon activity improves method.
It is achieved particular by techniques below scheme:
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 3～15h, obtain solution；
2), after activated carbon or activated carbon raw material being mixed with acid, it is stirred for uniformly, and uses Ultrasonic Treatment 1-3h, obtains being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature Process 3～15h for 40-70 DEG C, obtain just material；
4) will just expect that being placed in vacuum is under 0.02-0.08MPa, using temperature is 70-90 DEG C of perseverance Temperature constant voltage processes 1-3h, obtains multiple material；
5) multiple material is processed 10-20min at 150 DEG C, then control temperature and be warming up at 6h 900 DEG C, then constant temperature process 1-3h, obtain just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is in Polyethylene Glycol, polyvinyl alcohol, polyvinyl butyral resin A kind of.
Described solvent is C1～C8Alcohol in one or deionized water.
Described dissolving, its temperature is 50-80 DEG C.
Described pore creating material is 7～11: 35～55 with the mixing ratio of solvent by quality ratio.
Described acid, it is oxidizing acid.
Described acid be mass concentration be the nitric acid of 5-65%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 1～3: 0.2～0.5.
Described ultrasound wave, its frequency is 10-300Hz.
Described microwave oven, its frequency is 40-90Hz.
The researcher of the present invention is by embodiment 1, embodiment 2, embodiment 3, embodiment 4, enforcement Example 5 carry out activity raising process the wear-resisting intensity of activated carbon, specific surface area, between 1-5nm Product pore volume, carry out detection statistics at the pore volume of the product of 5-20nm；And also treat place Reason activated carbon or the wear-resisting intensity of activated carbon raw material, specific surface area, product between 1-5nm Pore volume, carry out detection statistics, and the conclusion to above-mentioned sample at the pore volume of the product of 5-20nm Contrasting, its result is as shown in table 1:
Table 1
Being shown by the data in table 1, the activated carbon activity of the present invention improves method, it is possible to effectively Make activated carbon activity raising so that its specific surface area increases at least 6m2/ g, various not All there is raising by a relatively large margin with the activity of the activated carbon product of particle diameter, and then effectively improve The activity of activated carbon.
The present invention is, by acid, activated carbon is carried out active oxidation effect so that the work of activated carbon Property pretreatment, then after pore creating material and solvent are configured to solution, are processed to be acidified material, make Obtain its pore volume that can increase activated carbon, improve the specific surface area of activated carbon, further very Under Altitude, cryogenic thermostat processes, then carries out intensification high-temperature process so that activated carbon wear-resisting Intensity is fixed, and specific surface area is stable so that the activity of activated carbon product is improved, Improve the quality of activated carbon.
Processing step in technical scheme is simple, and parameter is easily controllable, mode of operation Simply.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is further limited Fixed, but claimed scope is not only limited to description.
Embodiment 1
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 3h, obtain solution；
2), after activated carbon being mixed with acid, it is stirred for uniformly, and uses ultrasonic Treatment 1h, Obtain being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature It is 40 DEG C and processes 3h, obtain just material；
4) will just expect that being placed in vacuum is under 0.02MPa, using temperature is at 70 DEG C of constant temperature and pressures Reason 1h, obtains multiple material；
5) multiple material is processed 10min at 150 DEG C, then controls temperature and be warming up to 900 DEG C at 6h, Constant temperature processes 1h again, obtains just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is Polyethylene Glycol.
Described solvent is deionized water.
Described dissolving, its temperature is 50 DEG C.
Described pore creating material is 1: 5 with the mixing ratio of solvent by quality ratio.
Described acid be mass concentration be the nitric acid of 5%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 1: 0.2.
Described ultrasound wave, its frequency is 10Hz.
Described microwave oven, its frequency is 40Hz.
Embodiment 2
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 15h, obtain solution；
2), after activated carbon raw material being mixed with acid, it is stirred for uniformly, and uses at ultrasound wave Reason 3h, obtains being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature It is 70 DEG C and processes 15h, obtain just material；
4) will just expect that being placed in vacuum is under 0.08MPa, using temperature is at 90 DEG C of constant temperature and pressures Reason 3h, obtains multiple material；
5) multiple material is processed 20min at 150 DEG C, then controls temperature and be warming up to 900 DEG C at 6h, Constant temperature processes 3h again, obtains just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is polyvinyl alcohol.
Described solvent is methanol.
Described dissolving, its temperature is 80 DEG C.
Described pore creating material is 11: 35 with the mixing ratio of solvent by quality ratio.
Described acid be mass concentration be the nitric acid of 65%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 3: 0.5.
Described ultrasound wave, its frequency is 300Hz.
Described microwave oven, its frequency is 90Hz.
Embodiment 3
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 11h, obtain solution；
2), after activated carbon being mixed with acid, it is stirred for uniformly, and uses ultrasonic Treatment 2h, Obtain being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature It is 50 DEG C and processes 5h, obtain just material；
4) will just expect that being placed in vacuum is under 0.07MPa, using temperature is at 80 DEG C of constant temperature and pressures Reason 2h, obtains multiple material；
5) multiple material is processed 15min at 150 DEG C, then controls temperature and be warming up to 900 DEG C at 6h, Constant temperature processes 2h again, obtains just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is polyvinyl butyral resin.
Described solvent is propanol.
Described dissolving, its temperature is 70 DEG C.
Described pore creating material is 9: 40 with the mixing ratio of solvent by quality ratio.
Described acid be mass concentration be the nitric acid of 35%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 2: 0.3.
Described ultrasound wave, its frequency is 100Hz.
Described microwave oven, its frequency is 70Hz.
Embodiment 4
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 3h, obtain solution；
2), after activated carbon raw material being mixed with acid, it is stirred for uniformly, and uses at ultrasound wave Reason 3h, obtains being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature It is 40 DEG C and processes 15h, obtain just material；
4) will just expect that being placed in vacuum is under 0.08MPa, using temperature is at 70 DEG C of constant temperature and pressures Reason 3h, obtains multiple material；
5) multiple material is processed 10min at 150 DEG C, then controls temperature and be warming up to 900 DEG C at 6h, Constant temperature processes 1h again, obtains just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is polyvinyl butyral resin.
Described solvent is amylalcohol.
Described dissolving, its temperature is 70 DEG C.
Described pore creating material is 10: 47 with the mixing ratio of solvent by quality ratio.
Described acid be mass concentration be the sulphuric acid of 88%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 1: 0.5.
Described ultrasound wave, its frequency is 200Hz.
Described microwave oven, its frequency is 60Hz.
Embodiment 5
A kind of activated carbon activity improves method, comprises the following steps:
1) after pore creating material being mixed with solvent, dissolution process 15h, obtain solution；
2), after activated carbon being mixed with acid, it is stirred for uniformly, and uses ultrasonic Treatment 1h, Obtain being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature It is 60 DEG C and processes 11h, obtain just material；
4) will just expect that being placed in vacuum is under 0.03MPa, using temperature is at 75 DEG C of constant temperature and pressures Reason 2h, obtains multiple material；
5) multiple material is processed 15min at 150 DEG C, then controls temperature and be warming up to 900 DEG C at 6h, Constant temperature processes 2h again, obtains just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
Described pore creating material, it is Polyethylene Glycol.
Described solvent is isoamyl alcohol.
Described dissolving, its temperature is 75 DEG C.
Described pore creating material is 8: 53 with the mixing ratio of solvent by quality ratio.
Described acid be mass concentration be the nitric acid of 25%.
Described step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is with quality Ratio is calculated as 2: 0.5.
Described ultrasound wave, its frequency is 50Hz.
Described microwave oven, its frequency is 70Hz.

Claims (10)

1. an activated carbon activity improves method, it is characterised in that comprise the following steps:
1) after pore creating material being mixed with solvent, dissolution process 3～15h, obtain solution；
2), after activated carbon or activated carbon raw material being mixed with acid, it is stirred for uniformly, and uses Ultrasonic Treatment 1-3h, obtains being acidified material；
3) acidifying material is placed in solution, stirs, use microwave oven to be warming up to temperature Process 3～15h for 40-70 DEG C, obtain just material；
4) will just expect that being placed in vacuum is under 0.02-0.08MPa, using temperature is 70-90 DEG C of perseverance Temperature constant voltage processes 1-3h, obtains multiple material；
5) multiple material is processed 10-20min at 150 DEG C, then control temperature and be warming up at 6h 900 DEG C, then constant temperature process 1-3h, obtain just finished product；
6) first finished product is cooled to room temperature at 10h, and remove impurity, classification, packaging warehouse-in.
2. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Pore creating material, it is the one in Polyethylene Glycol, polyvinyl alcohol, polyvinyl butyral resin.
3. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Solvent be C1～C8Alcohol in one or deionized water.
4. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Dissolving, its temperature is 50-80 DEG C.
5. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described The mixing ratio of pore creating material and solvent be 7～11: 35～55 by quality ratio.
6. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Acid, it is oxidizing acid.
7. the activated carbon activity as described in claim 1 or 6 improves method, it is characterised in that Described acid be mass concentration be the nitric acid of 5-65%.
8. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Step 2), activated carbon or activated carbon raw material are mixed with acid, mixing ratio is by quality ratio 1～3: 0.2～0.5.
9. activated carbon activity as claimed in claim 1 improves method, it is characterised in that described Ultrasound wave, its frequency is 10-300Hz.
10. activated carbon activity as claimed in claim 1 improves method, it is characterised in that institute The microwave oven stated, its frequency is 40-90Hz.
CN201610259705.4A 2016-04-25 2016-04-25 A kind of activity carbon activity improves method Active CN105883799B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610259705.4A CN105883799B (en) 2016-04-25 2016-04-25 A kind of activity carbon activity improves method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610259705.4A CN105883799B (en) 2016-04-25 2016-04-25 A kind of activity carbon activity improves method

Publications (2)

Publication Number Publication Date
CN105883799A true CN105883799A (en) 2016-08-24
CN105883799B CN105883799B (en) 2018-06-29

Family

ID=56704580

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610259705.4A Active CN105883799B (en) 2016-04-25 2016-04-25 A kind of activity carbon activity improves method

Country Status (1)

Country Link
CN (1) CN105883799B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106986337A (en) * 2016-12-23 2017-07-28 镇江华域环保设备制造有限公司 A kind of preparation method of air cleaning porous activated carbon
CN107200327A (en) * 2017-04-19 2017-09-26 句容市百诚活性炭有限公司 A kind of regenerated carbon preparation method
CN107602239A (en) * 2017-10-16 2018-01-19 乌鲁木齐好到家农业科技有限公司 It is a kind of suitable for soil nutrient activator of alkaline land improving and preparation method thereof
CN108686620A (en) * 2018-05-04 2018-10-23 同济大学 A kind of modifying method of activated carbon that can be effectively increased channel surfaces positive charge radical amount

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1669919A (en) * 2005-02-28 2005-09-21 昆明理工大学 Method for producing mesopore activated carbon
CN101070156A (en) * 2007-06-08 2007-11-14 山东大学 Method for preparing active charcoal of poly gonum orientale straw stem
CN101092239A (en) * 2007-06-25 2007-12-26 高凤仙 Method for preparing super active carbon based on hickory with coal being adulterated
CN101269345A (en) * 2008-05-08 2008-09-24 郴州高鑫铂业有限公司 Oxidation treatment method for carrier carbon surface
CN101618871A (en) * 2009-03-27 2010-01-06 新疆大学 Method for preparing active carbon by apricot shell
CN102205961A (en) * 2011-03-10 2011-10-05 大连理工大学 Method for adjusting pore structure of activated carbon
US20120050948A1 (en) * 2009-04-10 2012-03-01 Jx Nippon Oil & Energy Corporation Carbon material for electric double layer capacitor electrode and method for producing the carbon material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1669919A (en) * 2005-02-28 2005-09-21 昆明理工大学 Method for producing mesopore activated carbon
CN101070156A (en) * 2007-06-08 2007-11-14 山东大学 Method for preparing active charcoal of poly gonum orientale straw stem
CN101092239A (en) * 2007-06-25 2007-12-26 高凤仙 Method for preparing super active carbon based on hickory with coal being adulterated
CN101269345A (en) * 2008-05-08 2008-09-24 郴州高鑫铂业有限公司 Oxidation treatment method for carrier carbon surface
CN101618871A (en) * 2009-03-27 2010-01-06 新疆大学 Method for preparing active carbon by apricot shell
US20120050948A1 (en) * 2009-04-10 2012-03-01 Jx Nippon Oil & Energy Corporation Carbon material for electric double layer capacitor electrode and method for producing the carbon material
CN102205961A (en) * 2011-03-10 2011-10-05 大连理工大学 Method for adjusting pore structure of activated carbon

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106986337A (en) * 2016-12-23 2017-07-28 镇江华域环保设备制造有限公司 A kind of preparation method of air cleaning porous activated carbon
CN107200327A (en) * 2017-04-19 2017-09-26 句容市百诚活性炭有限公司 A kind of regenerated carbon preparation method
CN107602239A (en) * 2017-10-16 2018-01-19 乌鲁木齐好到家农业科技有限公司 It is a kind of suitable for soil nutrient activator of alkaline land improving and preparation method thereof
CN108686620A (en) * 2018-05-04 2018-10-23 同济大学 A kind of modifying method of activated carbon that can be effectively increased channel surfaces positive charge radical amount
CN108686620B (en) * 2018-05-04 2020-11-10 同济大学 Active carbon modification method capable of effectively increasing number of positive charge groups on surface of pore channel

Also Published As

Publication number Publication date
CN105883799B (en) 2018-06-29

Similar Documents

Publication Publication Date Title
CN105883799A (en) Method for improving activity of activated carbon
CN110559853B (en) Method and device for removing gaseous pollutants by anode and cathode synchronous electrochemical method
CN110642238B (en) Graphene-like nitrogen-doped porous carbon material and preparation method and application thereof
CN105854882A (en) Magnetic Co3O4-C nano material and preparation method thereof as well as application of magnetic Co3O4-C nano material as catalyst for activating peroxymonosulfate to wastewater treatment
CN112007681A (en) Preparation method and application of nitrogen-doped biological carbon-loaded monatomic iron
CN106423251A (en) Preparation method of supported palladium catalyst
CN103521218B (en) Preparation method for photocatalyst used for treating volatile organic compounds
CN104843668A (en) Method for preparing nitrogen doped porous carbon material by using biologic proteins
CN108568307A (en) The porous g-C of oxygen doping3N4Photochemical catalyst and the preparation method and application thereof
CN106876730A (en) The porous carbon-supported base metal elctro-catalyst of N doping is prepared and electro-catalysis application
CN109928391A (en) Modified distiller's grain-based activated carbon and preparation method thereof
CN107096380B (en) Method and device for treating formaldehyde in air by catalytic oxidation
CN108773844A (en) A kind of method that micro-calcium addition catalytic activation prepares coal base porous carbon materials
KR20180004602A (en) Method for manufacturing activated carbon
CN106044744A (en) Preparation method and application of graphene-lignin-based composite hierarchical pore carbon plate material
Wang et al. Low temperature modified sludge-derived carbon catalysts for efficient catalytic wet peroxide oxidation of m-cresol
CN106362803A (en) Ag-PANI embedded imprinting CdS/Fe3O4/C of Z-like heterojunction and preparation method of Ag-PANI embedded imprinting CdS/Fe3O4/C
CN106824069A (en) Preparation method for processing the rear-earth-doped iron Carbon Materials of arsenic-containing waste water
CN103563984A (en) Method for preparing graphene oxide/ silver antibacterial composite material through intermediate pneumatic plasma jet
CN110227825A (en) A kind of low energy ball milling prepares graphene/copper/cuprous oxide composite granule method
CN110950421A (en) MgO micro-sphere with high specific surface area and preparation method and application thereof
Prusov et al. Green synthesis of nanoparticles of copper and its oxides in a nanoporous carbon matrix
CN111659376B (en) Preparation method of ozone catalytic oxidation catalyst and ozone catalytic oxidation catalyst prepared by same
CN109761236A (en) A kind of method that microwave-assisted re-activation prepares multistage mesoporous activated carbon
CN105413727A (en) Nano-particle in yolk-eggshell structure and preparation thereof and application thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: Method for improving activity of activated carbon

Effective date of registration: 20200521

Granted publication date: 20180629

Pledgee: Liupanshui Rural Commercial Bank Co., Ltd

Pledgor: GUIZHOU ANKAIDA INDUSTRIAL Co.,Ltd.

Registration number: Y2020520000007