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A kind of preparation method of nitrogen-doped basic porous carbon

A nitrogen-doped, porous carbon technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of poor hydrophilicity, poor recyclability, and low adsorption capacity, and achieve adsorption The effect of large amount, good adsorption performance and large pore volume

Active Publication Date: 2020-02-18
宁夏伯特利活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adsorbents usually only perform monolayer adsorption, and their adsorption capacity is low, their hydrophilicity is poor, and their recyclability is poor.

Method used

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  • A kind of preparation method of nitrogen-doped basic porous carbon
  • A kind of preparation method of nitrogen-doped basic porous carbon
  • A kind of preparation method of nitrogen-doped basic porous carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of nitrogen-doped alkaline activated carbon, carried out according to the following steps:

[0030] Step A, take the raw materials by weighing 4 parts of coal tar pitch, 4 parts of 2-methylimidazole, 30 parts of magnesium oxide and 20 parts of potassium hydroxide respectively with an electronic balance;

[0031] Step B, grind block coal tar pitch into powder, grind 2-methylimidazole into powder, then mix light magnesia, coal tar pitch powder and 2-methylimidazole powder evenly, finally grind potassium hydroxide, and Potassium hydroxide was ground into powder and quickly added to the mixture of coal tar pitch powder, 2-methylimidazole powder and light magnesium oxide to form a mixed sample; wherein, coal tar pitch and 2-methylimidazole were ground into powder and then passed Sieve, preferably powder with a particle size of <100 mesh, potassium hydroxide only needs to be ground into powder without sieving to prevent deliquescence;

[0032] Step C, pu...

Embodiment 2

[0037] The final temperature of this embodiment is 850°C, and other conditions are the same.

Embodiment 3

[0039] The final temperature of this embodiment is 900°C, and other conditions are the same.

[0040] The porous carbons prepared in the above three examples were subjected to nitrogen adsorption and desorption experiments, and their structural properties were measured to obtain the specific surface area, pore diameter and pore volume data, as shown in Table 1.

[0041] Table 1

[0042] samples Dap(nm) S BET (m 2 / g)

V t (cm 3 / g)

KNC 800

3.35 2801 2.41 KNC 850

3.46 2813 2.43 KNC 900

3.42 2765 2.39

[0043] Among them: KNC 800 Indicates the preparation of activated carbon with a final temperature of 800 ° C, the same for the other two; Dap (nm) indicates the average diameter of the pores; S BET (m 2 / g) represents the specific surface area of ​​carbon; Vt (cm 3 / g) represents the pore volume of carbon.

[0044]For the adsorption of multi-layer dyes, the larger the specific surface area of ​​activated carb...

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Abstract

The invention relates to a preparation method of nitrogen-doped alkaline porous carbon. The preparation method comprises specific steps as follows: a carbon source, a nitrogen source, a template and an activator are crushed and mixed uniformly, a mixed sample is put in a corundum boat and is heated and carbonized in a tube furnace, and the carbonized carbon material is crushed, subjected to acid pickling and finally dried for storage. The nitrogen content of the nitrogen-doped alkaline porous carbon prepared with the method has higher nitrogen content than that of commercial carbon, the nitrogen-doped alkaline porous carbon has an alkaline surface and high adsorption function on acid dyes, and the dye adsorption can be further improved in a multi-layer adsorption manner.

Description

technical field [0001] The invention relates to the field of activated carbon, in particular to a preparation method of nitrogen-doped basic porous carbon. Background technique [0002] Dye wastewater is wastewater generated during the processing of textile dyes, and reactions such as nitrification, redox, diazotization, and sulfonation will occur during the production process. A large amount of wastewater will be generated in each process of printing and dyeing processing. Their common characteristics are low pH, high toxicity, and refractory degradation. Therefore, dye wastewater has always been one of the more difficult wastewater in industrial wastewater. The chemical oxygen demand (COD) reaches thousands or even tens of thousands, and the biodegradability is poor. [0003] Adsorption method is a common method to treat printing and dyeing wastewater. Adsorption method can be carried out at normal temperature and pressure. It is widely used. Adsorbent is the key to adsor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30C02F101/30
CPCB01J20/0259B01J20/20C02F1/283C02F2101/308C02F2103/30
Inventor 许皖胡可黄三妹
Owner 宁夏伯特利活性炭有限公司