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Preparation method of pitch-based spherical activated carbon suitable for industrial production

A technology suitable for industrial production, spherical activated carbon, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low pelleting output rate, difficult industrial production, difficult to achieve continuous production, etc., to achieve simple and efficient process Effect

Inactive Publication Date: 2017-05-31
俞祥敏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the asphalt and medium liquid quality system is enlarged to a certain scale, a large amount of time is essentially consumed in the process of heating and cooling the medium liquid, so it is not easy to realize continuous production, causing many difficulties and obstacles to industrial production, and the pelleting output rate is low.

Method used

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Examples

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Effect test

preparation example Construction

[0010] A kind of preparation method of pitch-based spherical activated carbon suitable for industrial production, the method may further comprise the steps:

[0011] Step 1, the softening point is 270 ℃ of petroleum-based pitch or coal-based pitch, flux anthracene, auxiliary flux naphthalene in the following weight ratio: pitch 55%, anthracene 28%-36%, naphthalene 8%-16% in 170~ 200°C, stirring and mixing for 7 to 15 minutes to obtain the modulated asphalt melt;

[0012] Step 2. Import the modulated asphalt melt prepared in step 1 into the spray plate of the rotary granulation of molten asphalt at 170-200°C, and use the centrifugal force to shake out the modulated asphalt melt at 170-200°C and disperse it in the air, and let it fall freely. Automatically solidify into a sphere before landing to get an asphalt ball;

[0013] Step 3. Finally, pitch-based spherical activated carbon is prepared by conventional pre-oxidation, carbonization, and activation processes. The prepared p...

Embodiment 1

[0015] Step 1. Prepare petroleum asphalt or coal-based asphalt with a softening point of 270°C, flux anthracene, and auxiliary flux naphthalene in the following weight ratio: 55% asphalt, 34% anthracene, and 11% naphthalene at 200°C, and stir and mix for 10 minutes to prepare Bitumen melt;

[0016] Step 2. Introduce the modulated asphalt melt into the molten asphalt rotary granulation spray plate at 188°C, use centrifugal force to throw the modulated asphalt melt at 188°C and disperse it in the air, fall freely, and automatically solidify into a sphere before landing to obtain asphalt ball.

[0017] Step 3: Heat the asphalt balls in an air atmosphere at a rate of 0.1-1°C / min to 300°C for non-melting treatment to obtain infusible asphalt balls; heat the infusible pitch balls from 300°C at 5°C / min under the protection of an inert gas Heating to 600°C for carbonization treatment for about 60 minutes, the carbonized sample was activated in an atmosphere of water vapor at 900°C fo...

Embodiment 2

[0020] Step 1. Prepare petroleum-based pitch or coal-based pitch with a softening point of 270°C, flux anthracene, and auxiliary flux naphthalene in the following weight ratio: pitch 55%, anthracene 30%, and naphthalene 15% at 190°C, stir and mix for 15 minutes to prepare Bitumen melt;

[0021] Step 2: Import the modulated asphalt melt into the molten asphalt rotary granulation spray plate at 175°C, use centrifugal force to throw the modulated asphalt melt at 175°C and disperse it in the air, fall freely, and automatically solidify into a sphere before landing to obtain asphalt ball.

[0022] Step 3: Heat the asphalt balls in an air atmosphere at a rate of 0.1-1°C / min to 300°C for non-melting treatment to obtain infusible asphalt balls; heat the infusible pitch balls from 300°C at 5°C / min under the protection of an inert gas Heating to 600°C for carbonization treatment for about 60 minutes, the carbonized sample was activated in an atmosphere of water vapor at 900°C for about...

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Abstract

The invention belongs to the technical field of activated carbon preparation, and in particular relates to a preparation method of pitch-based spherical activated carbon suitable for industrial production. According to the preparation method, pitch and an aromatic hydrocarbon fluxing agent are taken according to a reasonable proportion and are fused at suitable temperature, and pitch spheres are prepared by a melt gas phase granulation method; the technology is simple and efficient, replaces an original melt liquid phase pelletizing method which is tremendously time-consuming and low in pelletizing rate, and is used to realize continuous industrial production at a pelletizing stage; the pelletizing yield exceeds 80% or above; the pitch-based spherical activated carbon reaches the requirements for the quality of foreign similar products after being treated by subsequent pre-oxidation, carbonization and activation.

Description

technical field [0001] The invention belongs to the technical field of activated carbon preparation, and in particular relates to a preparation method of pitch-based spherical activated carbon suitable for industrial production. Background technique [0002] Pitch-based spherical activated carbon is a top high-tech product in the activated carbon industry, and it is also an embargoed product abroad. In the 1990s, my country has completed the research and development of the laboratory stage, but has not yet achieved mass production on an industrial scale, because of the dependence on the laboratory technology path. The process route of asphalt spherical activated carbon is: according to the special formula to form a special modulated asphalt - pelletizing - pre-oxidation - carbonization - activation, the laboratory pelletizing method is to heat the asphalt and the medium liquid together until the asphalt melts, stirs and disperses, cools, and solidifies. Then filter out the ...

Claims

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Application Information

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IPC IPC(8): C01B32/312
CPCC01P2006/12C01P2006/14C01P2006/17
Inventor 俞祥敏
Owner 俞祥敏
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