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Method for preparing activated carbon with high-specific surface area

A high specific surface area, activated carbon technology, applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low adsorption capacity of activated carbon, underdeveloped microporous structure, low specific surface area, etc., to achieve excellent adsorption performance, Easy to operate, high specific surface area effect

Inactive Publication Date: 2017-09-05
句容市百诚活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the specific surface area of ​​activated carbon in the prior art is relatively low, and the microporous structure is not developed enough, resulting in low adsorption capacity of activated carbon, which limits its further development in the fields of pharmaceutical industry, drinking water treatment, catalysts, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Anthracite is crushed to 100 μm and then dried, then added to 30wt% potassium hydroxide solution and soaked for 10 hours, the weight ratio of the coal-based carbon to potassium hydroxide solution is 1:3, and filtered; the filtered residue is placed in Heating and activating in a muffle furnace, the activation temperature is 720°C, and the time is 80min, then cooled to room temperature to obtain the activated product; the activated product is pickled with dilute hydrochloric acid with a concentration of 3wt%, then washed with water until neutral, and finally passed 200 mesh sieve to obtain activated carbon with a yield of 68%.

[0020] According to the experimental measurement, the specific surface area is 3467m 2 / g, the iodine value is 2835mg / g, and the methylene blue value is 812mg / g.

Embodiment 2

[0022] Anthracite is crushed to 200 μm and then dried, then added to 35wt% potassium hydroxide solution and soaked for 12 hours, the weight ratio of the coal-based carbon to the potassium hydroxide solution is 1:4, and filtered; the filtered residue is placed in Heating and activating in a muffle furnace, the activation temperature is 750°C, and the time is 70min, then cooled to room temperature to obtain the activated product; the activated product is pickled with dilute hydrochloric acid with a concentration of 4wt%, then washed with water until neutral, and finally passed 200 mesh sieves to obtain activated carbon with a yield of 61%.

[0023] According to the experimental measurement, the specific surface area is 3432m 2 / g, the iodine value is 2817mg / g, and the methylene blue value is 835mg / g.

Embodiment 3

[0025] The bituminous coal is crushed to 300 μm and then dried, then added to 40wt% potassium hydroxide solution and soaked for 8 hours, the weight ratio of the coal-based carbon to the potassium hydroxide solution is 1:6, and filtered; the filtered residue is placed in Heating and activating in a muffle furnace, the activation temperature is 780°C, and the time is 60min, then cooled to room temperature to obtain the activated product; the activated product is pickled with dilute hydrochloric acid with a concentration of 5wt%, then washed with water until neutral, and finally passed 200 mesh sieves to obtain activated carbon with a yield of 52%.

[0026] Experimentally measured, the specific surface area is 3500m 2 / g, the iodine value is 2926mg / g, and the methylene blue value is 809mg / g.

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Abstract

The invention relates to a preparation method of activated carbon with high specific surface area. The coal-based carbon is crushed and then dried, then added to a potassium hydroxide solution with a concentration of 25-40wt%, soaked for 8-12h, and filtered; the filtered residue is placed in Heating and activating in a muffle furnace, then cooling to room temperature to obtain the activated product; acid-washing the activated product, then washing to neutrality, and finally sieving to obtain the product; the process of the present invention is simple and easy to operate, and the prepared activated carbon has high The specific surface area and developed microporous structure have excellent adsorption properties.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon with a high specific surface area, and belongs to the technical field of fine chemicals. Background technique [0002] Activated carbon is a carbonaceous adsorption material with rich pore structure and huge specific surface area. It has the characteristics of strong adsorption capacity, good chemical stability, high mechanical strength, and convenient regeneration. It is widely used in industry, agriculture, and national defense. , transportation, medical and health, environmental protection and other fields, its demand is increasing year by year with the social development and the improvement of people's living standards, especially in recent years, with the increasing requirements of environmental protection, the demand for activated carbon at home and abroad Getting bigger and bigger every year. [0003] With the development o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348
CPCC01P2006/12
Inventor 叶孙龙
Owner 句容市百诚活性炭有限公司
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