CN1385368A - Method for making wooden quality granule shape activated char used in recovering solvent - Google Patents
Method for making wooden quality granule shape activated char used in recovering solvent Download PDFInfo
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- CN1385368A CN1385368A CN02122974A CN02122974A CN1385368A CN 1385368 A CN1385368 A CN 1385368A CN 02122974 A CN02122974 A CN 02122974A CN 02122974 A CN02122974 A CN 02122974A CN 1385368 A CN1385368 A CN 1385368A
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Abstract
The present invention belongs to a production technique of active carbon by using saw dust or discards of farm and forest products as raw material, and said production technique incldues the following steps: soaking raw material by using activating agent phosphoric acid soaking temp. is 100-200 deg.C, and the concentration of activating agent is 30 Be-60Be, after the raw material is softened and stickability-produced, kneading and extruding to obtain granular semi-finished product, then making the semi-finished product undergo the convertional processes of drying, carbonizing, chemical activating, recovering activating agent, removing impurity, drying, screening and packaging so as to obtain the invneted end product.
Description
Technical field
A kind of wooden quality granule shape activated char used in recovering solvent manufacture method of the present invention relates to technical field of inorganic, and concrete is the manufacturing technology that belongs to a kind of gac, comprising promoting agent use and granulating and forming etc.
Background technology
Nearly all carbonaceous material all can be used to produce gac, if any being called wood activated charcoal, active fruit shell carbon and coal mass active carbon etc.The critical process of making gac is activation, because the difference of used activator, can be divided into chemical such as useful zinc chloride or phosphoric acid is the chemical activation method of activator, also has another kind ofly to be the gas activation method of activator with water vapour or carbonic acid gas etc.The former can be called for short chemical activation method, and the latter abbreviates physical activation method again as, and the variation of matter all takes place this two classes reactivation process separately, all is the process of chemical transformation.Phosphoric acid activation method is as follows, and carbon containing thing charing or not charing is made starting raw material, and for example sawdust and the phosphoric acid with porphyrize blendes together pulpous state, and is dry in converter, is heated to 400 ℃～600 ℃.Extract and reclaim phosphoric acid, phosphoric acid salt is reclaimed in the neutralization back sometimes, the dry gac that gets.Also can adopt phosphoric acid and water vapor associating activation method.The activation of physics method is as follows, earlier with after the raw material charing, makes activator with water vapour, and about 1000 ℃ of temperature of reaction generates gac.If select xylocarp shell, xylocarp nuclear, and hard wood is the raw material of above-mentioned physics method, the broken screening of the gac that generates just can be become the granular active carbon product of indefinite form so.Because powdery carbon has the disadvantage of dust also to be not useable for gas phase, lack commercial value and make granular carbon from powdered carbon, therefore to further develop the manufacture method of granular carbon.It is as follows to make wood substance grain charcoal method, and raw material is a charcoal.Earlier raw material is worn into fine powder and a certain proportion of tackiness agent and mixed at the mixing hollander of heating and pinch, extrusion molding in extrusion machine then, the hawser shape for cross section 〉=1 millimeter is cut into after the drying and waits the axle saccharoid, charing then, last gas activation and get granular carbon.Tackiness agent can adopt wood tar oil, lignosulfonic acid or phenols and aldehyde mixture or its condenses.(foregoing is seen Jia chief editor's in its " Application of Brand Active Carbon " in heptan, press of East China University of Science, March in 2002 the 1st edition.The 12nd page, the 13rd page, the 14th page, the 17th page, the 23rd page, the 150th page) problem is to adopt aforesaid method, can only produce absorption and the not high wood substance grain shaped activated carbon of desorption index.
Summary of the invention
In view of this; the present invention proposes a kind of wooden quality granule shape activated char used in recovering solvent manufacture method; its technical problem to be solved is without charcoal or shell fruit stone and will make raw material with the waste of the agriculture and forestry product of wood chip or other cellulose hemicelluloses; to correspondingly change to develop and a kind of new manufacture method, and can produce a kind of novel wood substance grain gac of solvent recuperation technical feature brilliance by this with comprehensive original manufacturing process.Technical scheme of the present invention is as follows, by processing sequence promptly in advance with chemical activating agent for example liquor zinci chloridi or phosphoric acid above-mentioned raw materials is soaked, soak time is no more than 24 hours, soaking top temperature is that plasticization temperature is no more than 200 ℃.Activator concentration is between 30Be to 60Be, and liquor zinci chloridi concentration also can be higher.Soak back raw material deliquescing and become sticky, can soften, plastify, flexible and plasticity-.Enter then to mix in the kneading machine and pinch into the dough shape, advance the extrusion machine moulding then as can be particulate state, its diameter is generally between 0.5 millimeter to 10.0 millimeters.Also can be cylindrical, spherical or other different forms, as flap.The work in-process of this particulate state or other shapes are drying, charing, chemical activation, recovery activator, removal of impurities, oven dry, screening and packing through conventional method again, are exactly final final product.Sometimes, pinch the stage, also can add tackiness agent such as Sulfite lignin and so on, with hardness or the proportion that increases final final product mixed; Also can add some powdered carbons,, but the more important thing is the performance that can change the finished product, to adapt to the various solvent of absorption with the favourable extrusion molding of adjustment humidity.The present invention contrasts prior art and Mierocrystalline cellulose, hemicellulose, material in the raw materials such as wood chip is played portion water Jie unzipping owing to having adopted before charing in advance, the glucide that hydrolysis goes out also plays a kind of binding agent effect and can utilizing, like this from dry charing until subsequent technique its to as if different.Therefore show through carrying out self check with the produced sample of the present invention with the condition that meets national standard " wood activated charcoal test method " GB/T12496.1～12496.22-1999, hardness between 90～98, benzene is adsorbed between the 30-100, the tetracol phenixin adsorptive value is between 60～100, desorption rate is very fast and reach 100% desorption, and every index all is better than the gac that prior art is produced.Show according to inner official testing once that in addition it is good that particle charcoal sample of the present invention and external certain type solvent recuperation charcoal compare out performance.Now will contrast disclose as follows.
External certain sample sample of the present invention sample 1. of the present invention 2.
Benzene % 81.8 88.3 103.32
Iodine mg/g 〉=929 961.9
Ash content 17.4 11.5 18.4
Intensity % 94.5 92.6 91.67
Apparent density g/ml 34 32 29.6
Butane 35.4 35.9
Gasoline 68.48
Tetracol phenixin adsorption rate % 102.34
Embodiment
First kind of mode:
Get dry hardwood bits, moisture content is got wherein 8-20 purpose granularity below 25% after the screening.Phosphoric acid solution with Baume 40 degree soaks, elevated temperature to 180 ℃ slowly, about 10 hours of time.Take out acid material mixed pinching in kneading machine, add some Sulfite lignin (through acidification) and activity charcoal powder this moment again.Above-mentioned three kinds of materials: the ratio of wood chip, lignin, powdered carbon is 1: 1: 1, promptly each 1/3rd.Mix that to pinch the back continuously extruded in screw extrusion press, press strip drops into charing and activation in the rotary kiln after drying again, washes out phosphoric acid solution then, obtains product after removing other mixed odds and ends, oven dry, screening.
The quality of product: Ф diameter: 0.2 millimeter benzene adsorption rate %:104.5
Iodine mg/g:961.9 intensity %:92.6
Butane absorption %:36.9
The second way:
Get dry cedar sawdust, moisture content is got wherein 8-20 purpose granularity below 25% after the screening, soaks elevated temperature to 130 ℃ slowly, about 2 hours of time with the liquor zinci chloridi of Baume 50Be.Taking-up zinc material mixes at kneading machine to be pinched, and add some Sulfite lignin (through acidification) and activity charcoal powder this moment again, and wherein the ratio of wood chip, Sulfite lignin, powdered carbon is 2: 1: 1, and all the other methods are identical with above-mentioned first kind of mode.
The quality of product: Ф diameter: 0.2 millimeter benzene adsorption rate %:164.4
Iodine mg/g:1040.8 intensity %:93.0
Butane absorption %:41.6
Claims (2)
1, a kind of manufacture method of wooden quality granule shape activated char used in recovering solvent, include following successively processing sequence, material choice, raw materials pretreatment and to handle the back material add tackiness agent, lignosulfonic acid mixes and pinches, extrusion molding, then the program of routinizing is a carbonization-activation and make gac, it is characterized in that:
(1) described material choice is the waste of the agriculture and forestry product of wood sawdust or other cellulose hemicelluloses;
(2) described raw materials pretreatment is for soaking in the solution that above-mentioned raw materials is placed on chemical activating agent such as phosphoric acid or zinc chloride, and activator concentration is between 30Be to 60Be, and soaking top temperature is that plasticization temperature is no more than 200 ℃, and soak time is no more than 24 hours;
(3) described when carrying out kneading process, can add powdered carbon;
(4) described extrusion molding is a particulate state, and its diameter is between 0.5 millimeter to 10.0 millimeters.
2,, it is characterized in that extrusion molding also can similar particulate state, as cylindrical, spherical according to the manufacture method of the described a kind of wood substance grain shape solvent recuperation charcoal of claim; Can also be other different forms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN02122974A CN1385368A (en) | 2002-06-14 | 2002-06-14 | Method for making wooden quality granule shape activated char used in recovering solvent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN02122974A CN1385368A (en) | 2002-06-14 | 2002-06-14 | Method for making wooden quality granule shape activated char used in recovering solvent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863470A (en) * | 2010-05-24 | 2010-10-20 | 浙江省林业科学研究院 | Method for preparing granular active carbon for gasoline vapor recovery by using oil tea shells |
| CN101913603A (en) * | 2010-08-16 | 2010-12-15 | 西北农林科技大学 | Method for preparing activated carbon from peeled branch wood of initiated branches in eucommia bark leaf forest |
| CN111762780A (en) * | 2020-05-06 | 2020-10-13 | 宁夏银建卡奔活性炭有限公司 | Special carbon for treating organic gas in urban underground water |
| CN114762775A (en) * | 2021-01-11 | 2022-07-19 | 尚鼎环境科技（江苏）有限公司 | Lactic acid solution decoloring system and saturated activated carbon deacidification method |
-
2002
- 2002-06-14 CN CN02122974A patent/CN1385368A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863470A (en) * | 2010-05-24 | 2010-10-20 | 浙江省林业科学研究院 | Method for preparing granular active carbon for gasoline vapor recovery by using oil tea shells |
| CN101913603A (en) * | 2010-08-16 | 2010-12-15 | 西北农林科技大学 | Method for preparing activated carbon from peeled branch wood of initiated branches in eucommia bark leaf forest |
| CN111762780A (en) * | 2020-05-06 | 2020-10-13 | 宁夏银建卡奔活性炭有限公司 | Special carbon for treating organic gas in urban underground water |
| CN114762775A (en) * | 2021-01-11 | 2022-07-19 | 尚鼎环境科技（江苏）有限公司 | Lactic acid solution decoloring system and saturated activated carbon deacidification method |
| CN114762775B (en) * | 2021-01-11 | 2023-08-08 | 尚鼎环境科技（江苏）有限公司 | Decoloring treatment system for lactic acid solution and deacidification treatment method for saturated activated carbon |
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