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Preparation method of mesoporous activated carbon

A mesoporous activated carbon and treatment liquid technology, applied in the field of mesoporous activated carbon preparation, can solve the problems of affecting the adsorption effect, single product structure, and few mesoporous activated carbons, and achieve good performance effects

Active Publication Date: 2015-12-30
江苏富汇通环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in this process, such as the need for high-voltage equipment, single product structure, etc.
At present, there are many methods for preparing activated carbon from woody materials, but there are not many methods for preparing mesoporous activated carbon with good performance. At the same time, the prepared activated carbon does not achieve a good specific surface area, which also affects the adsorption effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of mesoporous activated carbon, comprising the following steps:

[0019] Step 1, soak 400g of sawdust in the treatment solution, raise the temperature to 50°C, stir for 10 minutes, then raise the temperature to 100°C under a vacuum condition of 0.003MPa, let it stand for 40 minutes, cool down to room temperature, and then add diethyl Toluenediamine 20g, mix homogeneously, obtain material one, wherein treatment liquid is the mixture of 600g4-chlorobutyric acid, 300g phthalic anhydride and 1800g water;

[0020] Step 2: Raise the temperature of material 1 to 600°C under the protection of nitrogen at a heating rate of 15°C / min, keep it for 150 minutes, and then lower it to room temperature to obtain carbonized material;

[0021] Step 3, immerse the carbonized material in an aqueous solution of ethylenediamine with a mass concentration of 8%, raise the temperature to 30°C, keep at a constant temperature for 100 minutes, then filter, wash with deionized w...

Embodiment 2

[0023] A preparation method of mesoporous activated carbon, comprising the following steps:

[0024] Step 1, soak 400g of sawdust in the treatment solution, raise the temperature to 53°C, stir for 15 minutes, then raise the temperature to 108°C under a vacuum condition of 0.004MPa, let it stand for 44 minutes, cool down to room temperature, and then add 30g of di Ethyltoluenediamine, mix homogeneously, obtain material one, wherein processing liquid is the mixture of 500g4-chlorobutyric acid, 300g phthalic anhydride and 1600g water;

[0025] Step 2: Raise the temperature of material 1 to 620°C under the protection of nitrogen at a heating rate of 16°C / min, keep it for 160 minutes, and then lower it to room temperature to obtain carbonized material;

[0026] Step 3, immerse the carbonized material in an aqueous solution of ethylenediamine with a mass concentration of 9%, raise the temperature to 33°C, keep at a constant temperature for 106 minutes, then filter, wash with deioniz...

Embodiment 3

[0028] A preparation method of mesoporous activated carbon, comprising the following steps:

[0029] Step 1, soak 400g of sawdust in the treatment solution, raise the temperature to 58°C, stir for 16 minutes, then raise the temperature to 112°C under a vacuum condition of 0.006MPa, let it stand for 46 minutes, cool down to room temperature, and then add 50g of di Ethyltoluenediamine, mix homogeneously, obtain material one, wherein treatment liquid is the mixture of 600g4-chlorobutyric acid, 350g phthalic anhydride and 1600g water;

[0030] Step 2: Raise the temperature of material 1 to 640°C under the protection of nitrogen at a heating rate of 20°C / min, keep it for 180 minutes, and then lower it to room temperature to obtain carbonized material;

[0031] Step 3, immerse the carbonized material in an aqueous solution of ethylenediamine with a mass concentration of 10%, raise the temperature to 38°C, keep at a constant temperature for 115 minutes, then filter, wash with deioniz...

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Abstract

The invention discloses a preparation method of mesoporous activated carbon. The preparation method includes: soaking sawdust in treating liquid, rising temperature to 50-60 DEG C, and stirring for 10-20 minutes; rising temperature to 100-120 DEG C under a vacuum condition, allowing standing for 40-50 minutes, and lowering temperature to room temperature; adding diethyltoluenediamine, and mixing well to obtain a first material; rising temperature of the first material to 600-650 DEG C under a condition of nitrogen protection, and maintaining for 150-200 minutes; lowering temperature to room temperature to obtain a carbonized material; soaking the carbonized material in a diethylamine water solution, rising temperature to 30-40 DEG C, and maintaining the temperature for 100-120 minutes; filtering, using deionized water to wash until pH does not change, and drying to obtain the mesoporous activated carbon. The mesoporous activated carbon obtained by the preparation method has good performance, and applicability is improved.

Description

technical field [0001] The invention belongs to the technical field of activated carbon preparation, and in particular relates to a preparation method of mesoporous activated carbon. Background technique [0002] Activated carbon is also called activated carbon black. It is black powder or massive, granular, honeycomb amorphous carbon, and there are also regular crystalline carbons. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically combined elements, mainly oxygen and hydrogen, these elements are left in the carbon due to incomplete carbonization, or in the activation process, foreign Non-carbon elements are chemically combined with the surface of activated carbon. For example, when activated by water vapor, the surface of activated carbon is oxidized or oxidized by water vapor; another type of admixture is ash, which is the inorganic part of activated carbon; ash in activated carbon is easy to cause secondary pollutio...

Claims

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Application Information

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IPC IPC(8): C01B31/12
Inventor 潘龙
Owner 江苏富汇通环保科技有限公司
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