Method for preparing active carbon by mechanical-chemical method

A mechanochemical method and technology for preparing activated carbon, applied in the chemical industry, can solve the problems of high energy consumption, complex process and high reaction temperature, and achieve the effects of lowering reaction temperature, high efficiency of adsorbing pollutants, and high specific surface area.

Inactive Publication Date: 2011-02-02
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
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Problems solved by technology

The above processes are relatively complicated, the reaction tem

Method used

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  • Method for preparing active carbon by mechanical-chemical method

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Embodiment 1

[0019] A method for preparing activated carbon by mechanochemical method, the specific steps of the method are:

[0020] (1) According to the weight ratio of pure phosphoric acid to dry cedar shavings of 1:1, put the cedar shavings in a phosphoric acid solution with a mass fraction of 60% and stir them evenly and then place them at room temperature for 8 hours;

[0021] (2) Load the above materials into a ball mill, continuously grind for 30 minutes to an average particle size of 1 to 2 μm, and then conduct heat treatment at a temperature of 300°C for 60 minutes;

[0022] (3) Then the treated material is pickled with 10% hydrochloric acid solution for 30 minutes; then washed with deionized water to pH 6, and after the water is qualified, it is moved to an oven and dried at 120 ℃ for 1 hour to obtain performance Good powdery activated carbon with developed micropores.

Embodiment 2

[0024] A method for preparing activated carbon by mechanochemical method, the specific preparation steps of the method are:

[0025] (1) According to the weight ratio of pure zinc chloride to bone-dry pine wood chips of 2:1, put the pine wood chips in a zinc chloride solution with a mass fraction of 45% and then place them at room temperature for 5 hours;

[0026] (2) Load the above-mentioned materials into a vibrating mill, continuously grind for 40 minutes, until the average particle size is 1 to 2 μm, and then heat treatment at 500°C for 45 minutes;

[0027] (3) The treated material is then pickled with 10% hydrochloric acid solution for 30 minutes; then washed with deionized water to pH 6.5, and after the water is qualified, it is moved to an oven and dried for 1.5 hours at 105 ℃ to obtain performance Good powdery activated carbon with developed micropores.

Embodiment 3

[0029] A method for preparing activated carbon by mechanochemical method, the specific preparation steps of the method are:

[0030] (1) According to the weight ratio of pure potassium hydroxide to dry husks of 3:1, put the husks in potassium hydroxide with a mass fraction of 70%, stir well, and then place them at room temperature for 2 hours;

[0031] (2) Load the above-mentioned materials into the grinding equipment, and continuously grind for 60 minutes until the average particle size is 1~2μm, and then heat treatment at 700℃ for 30 minutes;

[0032] (3) The treated material is then pickled with 10% hydrochloric acid solution for 30 minutes; then washed with deionized water to pH 7, and after the water is qualified, it is transferred to an oven and dried at 110 ℃ for 2 hours to obtain performance Good powdery activated carbon with developed micropores.

[0033]

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Abstract

The invention relates to a method for preparing active carbon by a mechanical-chemical method. The method comprises the following specific steps of: (1) putting a dried carbon source material into 10 to 70 mass percent of solution of a pure aid in a mass ratio of 3:1-1, uniformly stirring and soaking at room temperature for 2 to 8 hours; (2) charging the material into grinding equipment, continuously grinding until average particle size is between 1 and 2 mu m and thermally treating at the temperature of between 300 and 700 DEG C for 30 to 60 minutes; and (3) washing the treated material with 10 percent solution of hydrochloric acid for 30 minutes, washing with deionized water until pH value is between 6 and 7 and transferring the material into a drying oven for drying after water washing is qualified so as to obtain powder active carbon. The method has the advantages of low reaction temperature, short time and low energy consumption. The prepared active carbon has the advantages of developed micropores, large specific surface area, rich surface functional group, higher pollutant adsorption efficiency, higher environmental compatibility, higher uniformity and low cost, and is convenient to operate and easy to regenerate.

Description

Technical field [0001] The invention belongs to the chemical industry field, and more specifically relates to a method for preparing activated carbon by a mechanochemical method. Background technique [0002] In modern production and life, both the industrial "three wastes" and the urban life "three wastes" must be purified before they can be discharged. As a kind of adsorption and purification material, activated carbon is widely used in the fields of industry, agriculture and environmental protection. However, the current activated carbon industry still has problems such as high production costs and easy pollution during the production process. Therefore, new production methods are sought to reduce production costs, reduce secondary pollution during the production process, and at the same time improve the performance of activated carbon and expand its application range It has become the focus of current research. Some researchers have conducted some low-cost activated carbon ...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 黄彪林冠烽陈学榕李素琼黄锦锋李涛谭非唐丽荣陈燕丹曾巧玲陈卫群陈翠霞
Owner FUJIAN AGRI & FORESTRY UNIV
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