CN115417407A - Preparation method of activated carbon - Google Patents
Preparation method of activated carbon Download PDFInfo
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- CN115417407A CN115417407A CN202211135405.7A CN202211135405A CN115417407A CN 115417407 A CN115417407 A CN 115417407A CN 202211135405 A CN202211135405 A CN 202211135405A CN 115417407 A CN115417407 A CN 115417407A
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- activated carbon
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- sludge particles
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/33—Preparation characterised by the starting materials from distillation residues of coal or petroleum; from petroleum acid sludge
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention relates to the field of activated carbon, in particular to a preparation method of activated carbon. The method comprises the following steps: A. drying the sludge particles to reduce the moisture content in the sludge particles; B. uniformly stirring sludge particles, coal and coal tar, carbonizing, and cooling to obtain a mixture; C. quickly heating and activating the mixture to obtain primary activated carbon; D. adding the primary activated carbon into industrial hydrochloric acid water for acid washing; E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral; F. drying the washed primary activated carbon; G. and adding an activating agent into the dried primary activated carbon for activation. The sludge particles, coal and coal tar are uniformly stirred and carbonized to obtain a mixture, the mixture is activated into primary activated carbon, the primary activated carbon is finally activated through an activating agent, and the final activated carbon is obtained by utilizing an inorganic strong acid reaction. The activated carbon prepared by the method has better adsorbability.
Description
Technical Field
The invention relates to the field of activated carbon, in particular to a preparation method of activated carbon.
Background
Activated carbon is a specially treated carbon produced by heating an organic raw material (husk, coal, wood, etc.) in the absence of air to reduce non-carbon components (this process is called carbonization), and then reacting with a gas to erode the surface and produce a structure with developed micropores (this process is called activation). Since the activation process is a microscopic process, i.e., the surface erosion of a large amount of molecular carbides is a point-like erosion, the surface of the activated carbon is caused to have countless fine pores. The diameter of the micropores on the surface of the activated carbon is mostly between 2 and 50nm, even a small amount of activated carbon has huge surface area, and the surface area of each gram of activated carbon is 500 to 1500m < 2 >. It has strong adsorption property, and is an industrial adsorbent with wide application. However, the activated carbon prepared by the prior art has poor adsorbability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the technical problems described in the background art, the present invention provides a method for preparing activated carbon. The method comprises the steps of uniformly stirring and carbonizing sludge particles, coal and coal tar to obtain a mixture, activating the mixture into primary activated carbon, finally activating by an activating agent, and reacting by using inorganic strong acid to obtain the final activated carbon. The activated carbon prepared by the method has better adsorbability.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of activated carbon comprises the following steps:
A. drying the sludge particles to reduce the moisture content in the sludge particles;
B. uniformly stirring sludge particles, coal and coal tar, carbonizing, and cooling to obtain a mixture;
C. quickly heating and activating the mixture to obtain primary activated carbon;
D. adding the primary activated carbon into industrial hydrochloric acid water for acid washing;
E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral;
F. drying the washed primary activated carbon;
G. adding an activating agent into the dried primary activated carbon for activation;
H. and finally, performing high-temperature treatment on the primary activated carbon, and then putting the primary activated carbon into strong inorganic acid for reaction to obtain a finished activated carbon product.
Specifically, the sludge particles, the coal and the coal tar are 30-40 parts by weight of sludge particles, 40-50 parts by weight of sludge particles and 5-10 parts by weight of coal tar.
Specifically, in the step B, the carbonization temperature is 400-600 ℃, and the carbonization time is 50-150 minutes.
Specifically, in the step C, the activation temperature is 520-550 ℃, and the activation time is 40-70 minutes.
Specifically, the activating agent comprises, by weight, 20-25 parts of aluminum hydroxide, 15-20 parts of diammonium hydrogen phosphate, 5-8 parts of zinc chloride and 1-3 parts of triethanolamine borate.
Specifically, in the step G, the high-temperature treatment step is to activate for 1.5 to 2.5 hours at a temperature of between 450 and 650 ℃; and cooling the activated primary activated carbon to below 250 ℃.
Specifically, the reaction time of the inorganic strong acid is 2 to 3 hours.
Specifically, in the step B, 20-30 parts by weight of furnace ash is added during carbonization.
Specifically, in the step H, an inert gas for protecting the primary activated carbon is added at the time of the high-temperature treatment.
Specifically, the inert gas is helium or neon.
The invention has the beneficial effects that: the invention provides a preparation method of activated carbon. The method comprises the steps of uniformly stirring and carbonizing sludge particles, coal and coal tar to obtain a mixture, activating the mixture into primary activated carbon, finally activating by an activating agent, and reacting by using inorganic strong acid to obtain the final activated carbon. The activated carbon prepared by the method has better adsorbability.
Detailed Description
The first embodiment is as follows:
a preparation method of activated carbon comprises the following steps:
A. drying the sludge particles to reduce the moisture content in the sludge particles;
B. uniformly stirring 30 parts of sludge particles, 40 parts of sludge particles, 5 parts of coal tar and 20 parts of furnace ash, carbonizing, and cooling to obtain a mixture; the carbonization temperature is 400 ℃ and the carbonization time is 50 minutes.
C. Rapidly heating and activating the mixture to obtain primary activated carbon; the activation temperature was 520 ℃ and the activation time was 40 minutes.
D. Adding the primary activated carbon into industrial hydrochloric acid water for acid washing;
E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral;
F. drying the washed primary activated carbon;
G. adding an activating agent into the dried primary activated carbon for activation; the activator comprises, by weight, 20 parts of aluminum hydroxide, 15 parts of diammonium hydrogen phosphate, 5 parts of zinc chloride and 1 part of triethanolamine borate.
H. And finally, performing high-temperature treatment on the primary activated carbon, and then putting the primary activated carbon into strong inorganic acid for reaction to obtain a finished activated carbon product. The high-temperature treatment comprises the steps of adding helium and activating at 450 ℃ for 1.5 hours; and cooling the activated primary activated carbon to below 250 ℃.
Example two:
a preparation method of activated carbon comprises the following steps:
A. drying the sludge particles to reduce the moisture content in the sludge particles;
B. uniformly stirring 40 parts of sludge particles, 50 parts of sludge particles, 10 parts of coal tar and 30 parts of furnace ash, carbonizing, and cooling to obtain a mixture; the carbonization temperature is 600 ℃, and the carbonization time is 150 minutes.
C. Quickly heating and activating the mixture to obtain primary activated carbon; the activation temperature was 550 degrees celsius and the activation time was 70 minutes.
D. Adding the primary activated carbon into industrial hydrochloric acid water for acid washing;
E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral;
F. drying the washed primary activated carbon;
G. adding an activating agent into the dried primary activated carbon for activation; the activator comprises, by weight, 25 parts of aluminum hydroxide, 20 parts of diammonium hydrogen phosphate, 8 parts of zinc chloride and 3 parts of triethanolamine borate.
H. And finally, performing high-temperature treatment on the primary activated carbon, and then putting the primary activated carbon into strong inorganic acid for reaction to obtain a finished activated carbon product. The high-temperature treatment comprises the steps of adding neon and activating at 650 ℃ for 2.5 hours; and cooling the activated primary activated carbon to below 250 ℃.
Example three:
A. drying the sludge particles to reduce the moisture content in the sludge particles;
B. uniformly stirring 35 parts of sludge particles, 45 parts of sludge particles, 7 parts of coal tar and 26 parts of furnace ash, carbonizing, and cooling to obtain a mixture; the carbonization temperature is 500 ℃, and the carbonization time is 100 minutes.
C. Quickly heating and activating the mixture to obtain primary activated carbon; the activation temperature was 530 ℃ and the activation time was 60 minutes.
D. Adding the primary activated carbon into industrial hydrochloric acid water for acid washing;
E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral;
F. drying the washed primary activated carbon;
G. adding an activating agent into the dried primary activated carbon for activation; the activator comprises, by weight, 23 parts of aluminum hydroxide, 17 parts of diammonium hydrogen phosphate, 6 parts of zinc chloride and 2 parts of triethanolamine borate.
H. And finally, performing high-temperature treatment on the primary activated carbon, and then putting the primary activated carbon into strong inorganic acid for reaction to obtain a finished activated carbon product. The high-temperature treatment comprises the steps of adding helium and activating at 600 ℃ for 2 hours; and cooling the activated primary activated carbon to below 250 ℃.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A preparation method of activated carbon is characterized by comprising the following steps:
A. drying the sludge particles to reduce the moisture content in the sludge particles;
B. uniformly stirring sludge particles, coal and coal tar, carbonizing, and cooling to obtain a mixture;
C. quickly heating and activating the mixture to obtain primary activated carbon;
D. adding the primary activated carbon into industrial hydrochloric acid water for acid washing;
E. washing with water after acid washing, and washing the pH value of the primary active carbon to be neutral;
F. drying the washed primary activated carbon;
G. adding an activating agent into the dried primary activated carbon for activation;
H. and finally, performing high-temperature treatment on the primary activated carbon, and then putting the primary activated carbon into strong inorganic acid for reaction to obtain a finished activated carbon product.
2. The method for preparing activated carbon according to claim 1, wherein: the weight parts of the sludge particles, the coal and the coal tar are 30-40 parts of the sludge particles, 40-50 parts of the sludge particles and 5-10 parts of the coal tar.
3. The method for preparing activated carbon according to claim 1, wherein: in the step B, the carbonization temperature is 400-600 ℃, and the carbonization time is 50-150 minutes.
4. The method for preparing activated carbon according to claim 1, wherein: in the step C, the activation temperature is 520-550 ℃, and the activation time is 40-70 minutes.
5. The method for preparing activated carbon according to claim 1, wherein: the activator comprises, by weight, 20-25 parts of aluminum hydroxide, 15-20 parts of diammonium hydrogen phosphate, 5-8 parts of zinc chloride and 1-3 parts of triethanolamine borate.
6. The method for preparing activated carbon according to claim 1, wherein: in the step H, the high-temperature treatment step is to activate for 1.5 to 2.5 hours at a temperature of between 450 and 650 ℃; and cooling the activated primary activated carbon to below 250 ℃.
7. The method for preparing activated carbon according to claim 1, wherein: the reaction time of the inorganic strong acid is 2 to 3 hours.
8. The method for preparing activated carbon according to claim 1, wherein: and in the step B, adding 20-30 parts of furnace ash by weight during carbonization.
9. The method for preparing activated carbon according to claim 1, wherein: and G, adding inert gas for protecting the primary activated carbon during high-temperature treatment.
10. The method for preparing activated carbon according to claim 9, wherein: the inert gas is helium or neon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211135405.7A CN115417407A (en) | 2022-09-19 | 2022-09-19 | Preparation method of activated carbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211135405.7A CN115417407A (en) | 2022-09-19 | 2022-09-19 | Preparation method of activated carbon |
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| CN115417407A true CN115417407A (en) | 2022-12-02 |
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| CN202211135405.7A Withdrawn CN115417407A (en) | 2022-09-19 | 2022-09-19 | Preparation method of activated carbon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462197A (en) * | 2023-03-27 | 2023-07-21 | 江苏浦士达环保科技股份有限公司 | Preparation method of activated carbon |
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2022
- 2022-09-19 CN CN202211135405.7A patent/CN115417407A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462197A (en) * | 2023-03-27 | 2023-07-21 | 江苏浦士达环保科技股份有限公司 | Preparation method of activated carbon |
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