CN102659101A - Method for preparing activated carbon from longan shells - Google Patents
Method for preparing activated carbon from longan shells Download PDFInfo
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- CN102659101A CN102659101A CN2012100281970A CN201210028197A CN102659101A CN 102659101 A CN102659101 A CN 102659101A CN 2012100281970 A CN2012100281970 A CN 2012100281970A CN 201210028197 A CN201210028197 A CN 201210028197A CN 102659101 A CN102659101 A CN 102659101A
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- longan
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- activated carbon
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- 235000000235 Euphoria longan Nutrition 0.000 title claims abstract description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 10
- 244000139609 Euphoria longan Species 0.000 title 1
- 240000001008 Dimocarpus longan Species 0.000 claims abstract description 51
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000007598 dipping method Methods 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 7
- 235000013399 edible fruits Nutrition 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 claims description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 229960000907 methylthioninium chloride Drugs 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract 2
- 238000010000 carbonizing Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000010908 plant waste Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 12
- 239000000047 product Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 240000007582 Corylus avellana Species 0.000 description 2
- 235000007466 Corylus avellana Nutrition 0.000 description 2
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000068645 Carya illinoensis Species 0.000 description 1
- 235000009025 Carya illinoensis Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 235000001543 Corylus americana Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000000525 Dimocarpus longan Nutrition 0.000 description 1
- 240000003133 Elaeis guineensis Species 0.000 description 1
- 235000001950 Elaeis guineensis Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000062245 Hedychium flavescens Species 0.000 description 1
- 241000134253 Lanka Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000220289 Pedunculata Species 0.000 description 1
- 241001093760 Sapindaceae Species 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- VFLDPWHFBUODDF-FCXRPNKRSA-N curcumin Chemical compound C1=C(O)C(OC)=CC(\C=C\C(=O)CC(=O)\C=C\C=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-FCXRPNKRSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- -1 metallurgy Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
- 239000003799 water insoluble solvent Substances 0.000 description 1
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Abstract
A method for preparing activated carbon from longan shells is a method for preparing environment-friendly activated carbon by taking longan shells as raw materials and phosphoric acid as an activating agent. Firstly, drying and crushing longan shells, then dipping, filtering, carbonizing and activating, and finally, recovering, rinsing, drying and the like to obtain the finished product of the active carbon. The activated carbon has the advantages of uniform texture, developed micropore pores, large specific surface area and the like. The longan shell adopted by the invention is a crop waste which is not effectively utilized at present, has sufficient source, and is effectively utilized to prepare the environment-friendly active carbon, thereby not only being beneficial to solving the problem of environmental pollution caused by burning or discarding, but also greatly reducing the manufacturing cost of the active carbon and being suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of preparation process of active carbon, particularly a kind ofly prepare process of active carbon with the longan shell.
Background technology
Gac is a kind of high-quality sorbent material, has the pore texture prosperity, specific surface area is big, physical and chemical performance is stable, physical strength is high, water insoluble and organic solvent and the good characteristics such as easy of regenerating.Therefore, has extensive use in fields such as food-processing, medicine, metallurgy, chemical industry, environmental protection and the energy.Growing along with society, the especially recent two decades rapid deterioration with environment that comes to be becoming tight global energy day, the demand of gac increases year by year.The performance of gac and its pore structure, raw material (precursor), preparation technology etc. are closely related.It is generally acknowledged that (d＜2nm), ((d＞50nm) form, the holes of different sizes have different functions to mesopore to structure of activated carbon for 2nm≤d≤50nm) and macropore by micropore.The raw material (precursor) of preparation gac has coal, refinery coke, synthetic macromolecule and natural polymer.The preparation technology of gac mainly comprises preparation method and influence factor thereof, like activator species, activation temperature, soak time etc.Wherein because big, inexpensive as the agricultural by-products amount of natural polymer, be easy to get, charcoal processing rate higher (25%-35%), and be beneficial to and economize on resources and environmental protection, therefore, usually be the important source material of preparation gac.Patent and Literature Consult show; Many agricultural by-products all have research or report like preparation gacs such as corn cob, Pericarppium arachidis hypogaeae, rice husk, cotton stalk, jute stalk, corn straw, bagasse, the plain producd fibers slag of yellow ginger, oil palm shell, hazelnut shell, coconut husk, pecan shell and pedunculata palls.Yet, with agricultural by-products---the longan shell prepares the rarely seen report of research of gac as raw material.
Longan (Dimocarpus Longan Lour) popular name " longan ", the fruit for Sapindaceae (Euphoraceae) plant longan has nutrition and medicinal double effects concurrently, is regarded as precious tonic since ancient times.Longan originates in the south subtropics area of south China and North Vietnam, at the cultivation history in existing more than 2000 year of China, mainly plants in Guangxi, Guangdong, Fujian and Taiwan etc. economize (district) at present.Wherein, Maoming, Guangdong is the maximum YEAST IN LONGAN PRODUCTION base of China.Along with the development of cultivation technique, the longan plantation expands to provinces such as Hainan, Sichuan, Yunnan and Guizhou.The country (area) of in addition, cultivating longan in the world also has Hawaii and the Florida State of Thailand, Laos, Burma, Sri Lanka, India, Philippines, Malaysia, Indonesia, Madagascar, Australian Queensland state, the U.S. etc.
The total cultivated area of whole world longan reaches 680,000 hectares, about 2,300,000 tons of output.China is as world's YEAST IN LONGAN PRODUCTION big country, and cultivated area surpasses 46.7hm
2, longan aril output surpasses 1,000,000 tons/year, and cultivated area and output all occupy first place in the world.At present, longan is main with directly edible its pulp mainly, and the fruit stone (China produces 55～750,000 tons per year) of its shell of 14%～22% (China produces 45～700,000 tons per year) and 17%～23% is not used effectively as yet.The longan shell contains abundant Mierocrystalline cellulose and xylogen, and the source is sufficient, is the high quality raw material of preparation gac.
The productive rate for preparing gac by agricultural wastes is that 25%-35% calculates, and 45～700,000 tons/year longan shell can prepare 15～200,000 tons/year gac, and this output is the YO that number decuples China present most of gac factory.Therefore, be the feedstock production gac with the competent longan shell of originating, will not only help protecting forest resources; Economize on resources, avoid the wasting of resources, reduce environmental pollution; And can produce good economic benefit and social value, but the phase is used for the suitability for industrialized production of gac.
Summary of the invention
The object of the present invention is to provide and a kind ofly prepared process of active carbon with the longan shell; Prepare the gac that a kind of quality is even, the micropore hole is flourishing, specific surface area is big; This not only helps to solve problem of environmental pollution; And having realized wastes of crops---effective utilization of longan shell greatly reduces the preparation cost of gac.
The present invention is achieved in that and comprises following several steps:
A) removing pulp with commercially available bright longan is raw material with fruit stone gained shell, natural air drying or oven dry back, is crushed to particle diameter and is about the big or small particle of 0.1-1mm;
B) be 1 by longan shell and massfraction 30～85% phosphoric acid qualities ratio: dipping 3～6h is stirred in (0.5～1.5);
C) the longan shell behind the above-mentioned dipping being moved in the tubular oven, under the nitrogen protection, is that 10 ℃/min is heated to carbonization-activation 2～6h, naturally cooling subsequently in 300～900 ℃ of scopes with temperature rise rate;
D) use hot water to carry out rinsing refrigerant, obtain active carbon finished products to filtrating to after neutrality, the oven dry.
The characteristic of the finished product gac of preparation is as stated above:
A) finished product gac quality is even, the micropore hole is flourishing, its specific surface area (S
BET) be 847～1634m
2G
-1, micropore specific area is 793～1524m
2G
-1, total pore volume (P/P
0=0.95) is 0.532～1.09cm
3G
-1, micro pore volume is 0.428～0.965cm
3G
-1, productive rate 23～36%, ash content 0.24%, iodine number 685～1236mg/g, methylene blue adsorption value 6.3～15.2mL/0.1g.
B) sufficient because of raw material longan shell source, this gac can be used for suitability for industrialized production.
Technique effect of the present invention is: this gac has advantages such as quality is even, the micropore hole is flourishing, specific surface area is big.Longan shell raw material is a kind of wastes of crops of utilization not yet in effect still at present; The source is sufficient, utilizes its preparation gac, not only helps to solve the problem of environmental pollution that brings when burning or abandoning; And greatly reduce the manufacturing cost of gac, but phase suitability for industrialized production.
Description of drawings
Fig. 1 is the N of embodiment 4 gained seed of Arillus Longan matrix activated carbons
2The adsorption-desorption isothermal map.
Fig. 2 is the pore size distribution curve figure of embodiment 4 gained seed of Arillus Longan matrix activated carbons.
Fig. 3 is the N of embodiment 5 gained seed of Arillus Longan matrix activated carbons
2The adsorption-desorption isothermal map.
Fig. 4 is the pore size distribution curve figure of embodiment 5 gained seed of Arillus Longan matrix activated carbons.
Embodiment
The present invention is achieved in that and comprises following several steps:
A) removing pulp with commercially available bright longan is raw material with fruit stone gained shell, natural air drying or oven dry back, is crushed to particle diameter and is about the big or small particle of 0.1mm;
B) be 1: 0.5 stirring dipping 3h by longan shell and massfraction 30% phosphoric acid quality ratio;
C) the longan shell behind the above-mentioned dipping being moved in the tubular oven, under the nitrogen protection, is that 10 ℃/min is heated to carbonization-activation 2h, naturally cooling subsequently in 300 ℃ of scopes with temperature rise rate;
D) use hot water to carry out rinsing refrigerant, obtain active carbon finished products to filtrating to after neutrality, the oven dry.
The present invention is achieved in that and comprises following several steps:
A) removing pulp with commercially available bright longan is raw material with fruit stone gained shell, natural air drying or oven dry back, is crushed to particle diameter and is about the big or small particle of 1mm;
B) be 1: 1.5 stirring dipping 6h by longan shell and massfraction 30～85% phosphoric acid qualities ratio;
C) the longan shell behind the above-mentioned dipping being moved in the tubular oven, under the nitrogen protection, is that 10 ℃/min is heated to carbonization-activation 6h, naturally cooling subsequently in 900 ℃ of scopes with temperature rise rate;
D) use hot water to carry out rinsing refrigerant, obtain active carbon finished products to filtrating to after neutrality, the oven dry.
The present invention is achieved in that and comprises following several steps:
A) removing pulp with commercially available bright longan is raw material with fruit stone gained shell, natural air drying or oven dry back, is crushed to particle diameter and is about the big or small particle of 0.5mm;
B) be 1: 1.2 stirring dipping 5h by longan shell and massfraction 50% phosphoric acid quality ratio;
C) the longan shell behind the above-mentioned dipping being moved in the tubular oven, under the nitrogen protection, is that 10 ℃/min is heated to carbonization-activation 3h, naturally cooling subsequently in 600 ℃ of scopes with temperature rise rate;
D) use hot water to carry out rinsing refrigerant, obtain active carbon finished products to filtrating to after neutrality, the oven dry.
Case study on implementation 4
The shell that removes its meat and nuclear gained with commercially available bright longan is a raw material, and drying and be crushed to particle diameter is the 0.5mm size, and by the longan shell: the mass ratio of phosphoric acid (70～80%) is 1: (1.2～1.5) mixing; After stirring dipping 3～4h, suction filtration, oven dry are under nitrogen protection; Temperature rise rate is 10 ℃/min, is warming up to activation 2～6h in 700～900 ℃ of scopes, naturally cooling; With pH=6～7 of hot wash to filtrating, oven dry promptly gets the active carbon finished products that quality is even, specific surface area is big.Its test result characteristic curve is like Fig. 1, shown in 2.
Case study on implementation 5
The shell that removes its meat and nuclear gained with commercially available bright longan is a raw material, dries and is crushed to particle diameter and be about the 0.5mm size, and by the longan shell: the mass ratio of phosphoric acid (40～45%) is 1: (0.9～1.1) mixing; After stirring dipping 3～4h, suction filtration, oven dry are under nitrogen protection; Temperature rise rate is 10 ℃/min, is warming up to activation 2～3h in 400～600 ℃ of scopes, naturally cooling; With pH=6～7 of hot wash to filtrating, oven dry promptly gets the active carbon finished products that quality is even, specific surface area is big.Its test result characteristic curve is like Fig. 3, shown in 4.
The characteristic parameter of the gac of different case study on implementation preparations is following
a
aS
BET, specific surface area; S
Mic, micropore surface is long-pending; V
Tot, TV; V
Mic, micro pore volume (
aS
BET, BET specific surface area; S
Mic, micropore surface area; V
Tot, total pore volume; V
Mic, micropore volume).
Claims (2)
1. one kind prepares process of active carbon with the longan shell, it is characterized in that comprising following several steps:
A) removing pulp with commercially available bright longan is raw material with fruit stone gained shell, natural air drying or oven dry back, is crushed to particle diameter and is about the big or small particle of 0.1-1mm;
B) be 1 by longan shell and massfraction 30～85% phosphoric acid qualities ratio: dipping 3～6h is stirred in (0.5～1.5);
C) the longan shell behind the above-mentioned dipping being moved in the tubular oven, under the nitrogen protection, is that 10 ℃/min is heated to carbonization-activation 2～6h, naturally cooling subsequently in 300～900 ℃ of scopes with temperature rise rate;
D) use hot water to carry out rinsing refrigerant, obtain active carbon finished products to filtrating to after neutrality, the oven dry.
2. according to claim 1ly prepare process of active carbon with the longan shell, the finished product gac quality that it is characterized in that obtaining evenly, the micropore hole is flourishing, its specific surface area (S
BET) be 847～1634m
2G
-1, micropore specific area is 793～1524m
2G
-1, total pore volume (P/P
0=0.95) is 0.532～1.09cm
3G
-1, micro pore volume is 0.428～0.965cm
3G
-1, productive rate 23～36%, ash content 0.24%, iodine number 685～1236mg/g, methylene blue adsorption value 6.3～15.2mL/0.1g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100281970A CN102659101A (en) | 2012-01-12 | 2012-01-12 | Method for preparing activated carbon from longan shells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100281970A CN102659101A (en) | 2012-01-12 | 2012-01-12 | Method for preparing activated carbon from longan shells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102659101A true CN102659101A (en) | 2012-09-12 |
Family
ID=46768723
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100281970A Pending CN102659101A (en) | 2012-01-12 | 2012-01-12 | Method for preparing activated carbon from longan shells |
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| Country | Link |
|---|---|
| CN (1) | CN102659101A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553038A (en) * | 2013-09-25 | 2014-02-05 | 蚌埠德美过滤技术有限公司 | Longan pit modified active carbon and preparation method thereof |
| CN103803549A (en) * | 2014-02-20 | 2014-05-21 | 江西师范大学 | Micron-sized granular active carbon prepared from litchi shells and preparation method thereof |
| CN103896267A (en) * | 2012-12-27 | 2014-07-02 | 福建大青实业有限公司 | Processing technology of shell carrier activated carbon |
| CN104140101A (en) * | 2014-08-18 | 2014-11-12 | 福建师范大学 | Method for preparing activated carbon with ultrahigh specific surface area from soapberry residue as raw material |
| CN109292773A (en) * | 2018-10-31 | 2019-02-01 | 张俊霞 | A kind of active carbon and its preparation method and application using trees preparation |
| CN110577221A (en) * | 2019-10-30 | 2019-12-17 | 凉山德农生物能源股份有限公司 | Preparation method of jatropha curcas-based biomass activated carbon |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369168A (en) * | 1979-08-21 | 1983-01-18 | Calgon Corporation | Regeneration of carbon employed in the wet process production of alkali metal phosphates |
| JPH01230414A (en) * | 1987-11-20 | 1989-09-13 | Osaka Gas Co Ltd | Activated carbon and production thereof |
| CN1215694A (en) * | 1997-10-29 | 1999-05-05 | 胡福昌 | Method for producing high performance active carbon from nut shell |
| CN102275911A (en) * | 2011-06-03 | 2011-12-14 | 中国林业科学研究院林产化学工业研究所 | Microporous active carbon and preparation method by chemical agent aperture regulation and control |
-
2012
- 2012-01-12 CN CN2012100281970A patent/CN102659101A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369168A (en) * | 1979-08-21 | 1983-01-18 | Calgon Corporation | Regeneration of carbon employed in the wet process production of alkali metal phosphates |
| JPH01230414A (en) * | 1987-11-20 | 1989-09-13 | Osaka Gas Co Ltd | Activated carbon and production thereof |
| CN1215694A (en) * | 1997-10-29 | 1999-05-05 | 胡福昌 | Method for producing high performance active carbon from nut shell |
| CN102275911A (en) * | 2011-06-03 | 2011-12-14 | 中国林业科学研究院林产化学工业研究所 | Microporous active carbon and preparation method by chemical agent aperture regulation and control |
Non-Patent Citations (1)
| Title |
|---|
| 吴文炳等: "微波辐射龙眼壳制备活性炭的正交试验研究", 《天津化工》, vol. 23, no. 4, 31 July 2009 (2009-07-31) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896267A (en) * | 2012-12-27 | 2014-07-02 | 福建大青实业有限公司 | Processing technology of shell carrier activated carbon |
| CN103553038A (en) * | 2013-09-25 | 2014-02-05 | 蚌埠德美过滤技术有限公司 | Longan pit modified active carbon and preparation method thereof |
| CN103803549A (en) * | 2014-02-20 | 2014-05-21 | 江西师范大学 | Micron-sized granular active carbon prepared from litchi shells and preparation method thereof |
| CN104140101A (en) * | 2014-08-18 | 2014-11-12 | 福建师范大学 | Method for preparing activated carbon with ultrahigh specific surface area from soapberry residue as raw material |
| CN109292773A (en) * | 2018-10-31 | 2019-02-01 | 张俊霞 | A kind of active carbon and its preparation method and application using trees preparation |
| CN110577221A (en) * | 2019-10-30 | 2019-12-17 | 凉山德农生物能源股份有限公司 | Preparation method of jatropha curcas-based biomass activated carbon |
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Application publication date: 20120912 |