CN105110328A - Activated carbon physicochemical modification method - Google Patents
Activated carbon physicochemical modification method Download PDFInfo
- Publication number
- CN105110328A CN105110328A CN201510507394.4A CN201510507394A CN105110328A CN 105110328 A CN105110328 A CN 105110328A CN 201510507394 A CN201510507394 A CN 201510507394A CN 105110328 A CN105110328 A CN 105110328A
- Authority
- CN
- China
- Prior art keywords
- activated carbon
- raw material
- carbon raw
- gac
- modification
- 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.)
- Pending
Links
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The present invention relates to the technical fields of activated carbon production and processing, and particularly to an activated carbon physicochemical modification method. The method comprises the steps of: removing impurities of an activated carbon raw material; performing high temperature processing of the decontaminated activated carbon raw material; performing modification preprocessing of the activated carbon; preforming heating, a reaction and modification of the processed activated carbon raw material; and drying and pulverizing the modified activated carbon raw material to obtain an activated carbon. The activated carbon physicochemical modification method provided by the present invention can simultaneously perform physical modification and chemical modification in the production process. The chemical modification mainly focuses on surface modification and hardly has adverse effects on properties of the activated carbon. Compares with activated carbon produced by common methods, the activated carbon prepared by the physicochemical modification method has better surface properties. Furthermore, in an energy consumption step, the activated carbon physicochemical modification method is optimized and lowers requirements so as to save energy and reduce emissions further.
Description
Technical field
The present invention relates to the process for processing technical field of gac, be specifically related to a kind of physical and chemical modified method of gac.
Background technology
Gac is also known as active black.Black powder or granular decolorizing carbon.Gac principal constituent goes back the element such as aerobic, hydrogen in addition to carbon.The reason of this to be gac be hydrophobic adsorbent.In gac except carbon, also comprise two class admixtures: a class is chemically combined element, mainly oxygen and hydrogen, these elements remain in charcoal owing to not carbonizing completely, or in reactivation process, external non-carbon is combined with Surface Chemistry of Activated Carbon, during as used steam activation, and the oxidized or steam oxidation of activated carbon surface; Another kind of admixture is ash content, and it is the inorganic part of gac, several gac elementary composition, easily causes secondary pollution.
Gac internal pore structure is flourishing, surface-area is large, a class microcrystalline carbon materials of high adsorption capacity.Nearly all carbonaceous material all can be used to manufacture gac, such as timber, sawdust, nutshell, coal, peat, straw etc.The critical process manufacturing gac is activation, and due to the difference of activator used, the activation of gac can be divided into two classes: the chemical activation method 1, with chemical such as zinc chloride, phosphoric acid or potassium hydroxide being activator, also known as chemical activation method; 2, be the gas activation of activator with water vapor or carbonic acid gas etc., also known as physical activation method.The gac that above-mentioned two kinds of methods obtain is respectively chemical carbon and physics charcoal.
Traditional process for preparing activated carbon many employings gas activation, activation furnace multiselect soil rake stove, activated gas is the mixed gas of water vapor and air, during activation, first in stove, increase the fuel such as timber burns to aglow by body of heater, then in stove, add carbonized material and continue to heat up, water vapor is passed in stove, obtain after described water vapor is boiled by boiler, the tail gas generated is directly emptying, last by artificial discharging, empty bucket is put to the outer discharge port of stove, discharge port is opened, with creeper by high temperature active charcoal rake to empty bucket, due to without cooling system, oven-fresh gac temperature is very high, entire body is rubescent, urgent need water cooling, be put in vacant lot cooling again, after gac is cooled, again through manually spotty screening of activated carbon being come, the iron substance in gac is dispelled with magnet, sort out residue, stir after pulverizing, by laboratory personnel's Detection job index, packaging warehouse-in.
In addition, along with the popularization to activated carbon application, various autotelic modification requires also in the production process of gac, to put forward requirement.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of physical and chemical modified method of gac.
A physical and chemical modified method for gac, comprises the following steps:
1) double solvents of activated carbon raw material through Ethanol-Acetic Acid is soaked, removing surface impurity;
2) carry out pyroprocessing after being dried by activated carbon raw material, pyroprocessing comprises the first paragraph process of 500 ~ 800 DEG C, the second segment process of 900 ~ 1050 DEG C, and the 3rd of 500 ~ 700 DEG C the section of process;
3) be that under the hydrogen environment of 5 ~ 20 DEG C, slow cooling is to normal temperature in temperature by the activated carbon raw material after pyroprocessing, hydrogen make speed control is per hour at 1 cubic metre;
4) again heated by activated carbon raw material, then to the aqueous solution of activated carbon raw material surface sprinkling low-concentration ethanol, react, the reaction times controls at 2 ~ 5 hours;
5) to reacted activated carbon raw material surface sprinkling water, process, the reaction times controls at 1 ~ 3 hour;
6) dry, then by activated carbon raw material as under vacuum condition, maintain the temperature condition 3 ~ 8 hours of 200 ~ 400 DEG C;
7) pulverize, both obtained gac.
Concrete, step 1) in, the volume ratio of Ethanol-Acetic Acid is 4 ~ 5:1.
Concrete, step 1) in, the double solvents of Ethanol-Acetic Acid and the volume ratio of activated carbon raw material are 0.2 ~ 0.3:1.
Preferably, described charing raw material is dried and is sent in body of heater after water content is less than 20% under 100 ~ 120 DEG C of conditions.
Preferably, step 3) in, the air pressure of hydrogen environment is 1.2 ~ 1.5 normal atmosphere.
Preferably, step 4) in the concentration of solvent of the aqueous solution of ethanol be 5 ~ 10%.
The physical and chemical modified method of gac provided by the present invention has carried out physically modified and chemical modification in process of production simultaneously, chemical modification mainly concentrates on surface modification, substantially disadvantageous effect is not had to the character of gac, compared to the gac that usual method is produced, there is better surface property.And be optimized in power consumption step, require to reduce, energy-saving and emission-reduction more.
Embodiment
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment
1) double solvents of 1000 activated carbon raw material through Ethanol-Acetic Acid is soaked, removing surface impurity.The volume ratio of Ethanol-Acetic Acid is for selecting 5:1, and the double solvents of Ethanol-Acetic Acid and the volume ratio of activated carbon raw material select 0.2:1.
2) carry out pyroprocessing after being dried by activated carbon raw material, pyroprocessing comprises the first paragraph process of 700 DEG C, the second segment process of 1000 DEG C, and the 3rd of 600 DEG C the section of process.Charing raw material is dried to water content close in 20% rear feeding body of heater under 120 DEG C of conditions.
3) be that under the hydrogen environment of 10 DEG C, slow cooling is to normal temperature in temperature by the activated carbon raw material after pyroprocessing, hydrogen make speed control is per hour at 1 cubic metre, and the air pressure of hydrogen environment is 1.5 normal atmosphere.
4) again heated by activated carbon raw material, then to the aqueous solution of activated carbon raw material surface sprinkling low-concentration ethanol, react, the reaction times controlled at 3 hours.The volumetric concentration of the solvent of the aqueous solution of ethanol is 5%.
5) to reacted activated carbon raw material surface sprinkling water, process, the reaction times controlled at 2 hours.
6) dry, then by activated carbon raw material as under vacuum condition, maintain the temperature condition 5 hours of 250 DEG C.
7) pulverize, both obtained gac, about 910g.
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a physical and chemical modified method for gac, is characterized in that, comprise the following steps:
1) double solvents of activated carbon raw material through Ethanol-Acetic Acid is soaked, removing surface impurity;
2) carry out pyroprocessing after being dried by activated carbon raw material, pyroprocessing comprises the first paragraph process of 500 ~ 800 DEG C, the second segment process of 900 ~ 1050 DEG C, and the 3rd of 500 ~ 700 DEG C the section of process;
3) be that under the hydrogen environment of 5 ~ 20 DEG C, slow cooling is to normal temperature in temperature by the activated carbon raw material after pyroprocessing, hydrogen make speed control is per hour at 1 cubic metre;
4) again heated by activated carbon raw material, then to the aqueous solution of activated carbon raw material surface sprinkling low-concentration ethanol, react, the reaction times controls at 2 ~ 5 hours;
5) to reacted activated carbon raw material surface sprinkling water, process, the reaction times controls at 1 ~ 3 hour;
6) dry, then by activated carbon raw material as under vacuum condition, maintain the temperature condition 3 ~ 8 hours of 200 ~ 400 DEG C;
7) pulverize, both obtained gac.
2. the physical and chemical modified method of gac according to claim 1, is characterized in that: step 1) in, the volume ratio of Ethanol-Acetic Acid is 4 ~ 5:1.
3. the physical and chemical modified method of gac according to claim 1, is characterized in that: step 1) in, the double solvents of Ethanol-Acetic Acid and the volume ratio of activated carbon raw material are 0.2 ~ 0.3:1.
4. the physical and chemical modified method of gac according to claim 1, is characterized in that: described charing raw material is dried and sent in body of heater after water content is less than 20% under 100 ~ 120 DEG C of conditions.
5. the physical and chemical modified method of gac according to claim 1, is characterized in that: step 3) in, the air pressure of hydrogen environment is 1.2 ~ 1.5 normal atmosphere.
6., according to the physical and chemical modified method of the arbitrary described gac of claim 1 to 5, it is characterized in that: step 4) in the concentration of solvent of the aqueous solution of ethanol be 5 ~ 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510507394.4A CN105110328A (en) | 2015-08-18 | 2015-08-18 | Activated carbon physicochemical modification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510507394.4A CN105110328A (en) | 2015-08-18 | 2015-08-18 | Activated carbon physicochemical modification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105110328A true CN105110328A (en) | 2015-12-02 |
Family
ID=54658501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510507394.4A Pending CN105110328A (en) | 2015-08-18 | 2015-08-18 | Activated carbon physicochemical modification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105110328A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003342014A (en) * | 2002-05-24 | 2003-12-03 | Futamura Chemical Industries Co Ltd | Activated carbon and its manufacturing method |
| CN101468797A (en) * | 2007-12-24 | 2009-07-01 | 徐文东 | Preparation of super active carbon material |
| CN101497439A (en) * | 2009-03-06 | 2009-08-05 | 中南大学 | Method for preparing active carbon |
| CN104386693A (en) * | 2014-11-14 | 2015-03-04 | 江汉大学 | Method for preparing activated carbon by Chinese herbal medicine residues |
-
2015
- 2015-08-18 CN CN201510507394.4A patent/CN105110328A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003342014A (en) * | 2002-05-24 | 2003-12-03 | Futamura Chemical Industries Co Ltd | Activated carbon and its manufacturing method |
| CN101468797A (en) * | 2007-12-24 | 2009-07-01 | 徐文东 | Preparation of super active carbon material |
| CN101497439A (en) * | 2009-03-06 | 2009-08-05 | 中南大学 | Method for preparing active carbon |
| CN104386693A (en) * | 2014-11-14 | 2015-03-04 | 江汉大学 | Method for preparing activated carbon by Chinese herbal medicine residues |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104923153A (en) | Preparation method for Canna biological carbon capable of simultaneously adsorbing ammonia nitrogen and cadmium | |
| CN103721677B (en) | A kind of preparation method of the biomass carbon composite for waste water dephosphorization | |
| CN104087323B (en) | A kind of utilize waste material of edible mushroom to prepare charcoal method and application | |
| CN104998620B (en) | Modified peanut shell biochar/polyaluminium chloride sludge composite adsorption material | |
| CN105148842A (en) | Preparing method of manganese oxide-charcoal composite adsorbent | |
| CN104549154B (en) | The preparation method of the charcoal of cadmium in the safe adsorbed water body of energy | |
| CN105731752A (en) | Method for preparing biochar by carrying out copyrolysis on excess sludge and hazelnut shell | |
| CN107364860B (en) | A kind of method that efficient cryogenic carbonization prepares straw biological charcoal | |
| CN103496700B (en) | A kind of method that Lignum seu Ramulus Cunninghamiae Lanceolatae wood flour pyrolysis residue is prepared activated carbon | |
| CN106810204B (en) | A kind of Fenton iron mud cathode and anode integrated ceramsite and method for preparing ceramsite by using Fenton iron mud | |
| CN105668564A (en) | Method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge | |
| CN101172899A (en) | A kind of sludge compost using bamboo charcoal as heavy metal fixative and preparation method thereof | |
| CN105753608A (en) | Preparation method and application of novel iron-based biochar | |
| CN105854807A (en) | Composite adsorbing material based on straw and preparation method thereof | |
| CN110302751A (en) | Composite biomass charcoal material and preparation method and application thereof | |
| CN104673338A (en) | Method for reinforcing charcoal carbon sequestration by utilizing phosphoric acid | |
| CN104998618A (en) | Method for preparing hydrothermal biomass charcoal from pecan shells | |
| CN105771897A (en) | Method for preparing charcoal through microwaves | |
| CN108557820A (en) | A kind of preparation method of COD high removal rates activated carbon from bamboo | |
| CN113816763A (en) | Biomass sludge ceramsite, preparation method and application | |
| CN107128912A (en) | A kind of preparation method of the Chinese medicine slag activated carbon of supported ion liquid | |
| CN113318738A (en) | Solid waste based biochar material, preparation method thereof and application of biochar material as additive material for improving sludge dewatering performance | |
| CN107555414A (en) | A kind of garden waste biomass carbon and its production and use | |
| CN108821283B (en) | Method for preparing activated carbon by using fir bark microwave-assisted hydrothermal method | |
| CN113600127A (en) | Elemental sulfur modified biochar, and preparation method 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151202 |
|
| RJ01 | Rejection of invention patent application after publication |