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Preparation method of active carbon with high adsorptive capacity

A technology of activated carbon and high adsorption, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of limited adsorption capacity and limited adsorption capacity, and achieve the effect of convenient operation, excellent adsorption capacity and wide source of raw materials

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

[0003] The specific surface area of ​​activated carbon in the prior art is usually 800-1500m 2 / g, limited adsorption capacity, limited adsorption capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using walnut shells as raw materials, air-dry the walnut shells and crush them to 100-300 μm, then add them to 30wt% phosphoric acid solution and soak for 10 hours, the weight ratio of walnut shells to phosphoric acid solution is 1:2, and filter; Activate in a muffle furnace, the activation temperature is 450°C, the time is 6h, the heating rate is controlled at 6°C / min, and then cooled to room temperature to obtain the activated product; the activated product is washed to neutral, and then dried at 110°C for 3 hours, Pass through a 100 mesh sieve to obtain activated carbon with a yield of 82%.

[0021] According to the experimental measurement, the specific surface area is 3028m 2 / g, the total pore volume is 3.12cm 3 / g, the iodine value is 2156mg / g, and the methylene blue value is 695mg / g.

Embodiment 2

[0023] Using coconut shell as raw material, air-dry the coconut shell and crush it to 100-300 μm, then add it to 35wt% phosphoric acid solution and soak for 12 hours, the weight ratio of coconut shell and phosphoric acid solution is 1:3, and filter; Activate in a muffle furnace, the activation temperature is 500°C, the time is 5h, the heating rate is controlled at 7°C / min, and then cooled to room temperature to obtain the activated product; the activated product is washed to neutral, and then dried at 110°C for 4 hours, Pass through a 100-mesh sieve to obtain activated carbon with a yield of 79%.

[0024] According to the experimental measurement, the specific surface area is 3126m 2 / g, the total pore volume is 2.89cm 3 / g, the iodine value is 2098mg / g, and the methylene blue value is 705mg / g.

Embodiment 3

[0026] Using apricot shells as raw materials, dry the apricot shells and crush them to 100-300 μm, then add them to 30wt% phosphoric acid solution and soak for 10 hours, the weight ratio of the apricot shells to the phosphoric acid solution is 1:4, and filter; Activate in a muffle furnace, the activation temperature is 550°C, the time is 4h, the heating rate is controlled at 8°C / min, and then cooled to room temperature to obtain the activated product; the activated product is washed to neutral, and then dried at 110°C for 4h, Pass through a 100-mesh sieve to obtain activated carbon with a yield of 71%.

[0027] According to the experimental measurement, the specific surface area is 3210m 2 / g, the total pore volume is 3.28cm 3 / g, the iodine value is 2023mg / g, and the methylene blue value is 720mg / g.

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Abstract

The invention relates to a preparation method of active carbon with high adsorptive capacity. The preparation method comprises the following steps: taking hard fruit shells as raw materials, air-drying the hard fruit shells, crushing to 100-300mu m, then adding into a phosphoric acid solution of which the concentration is 30-40wt% for soaking for 8-12h, and filtering, wherein the weight ratio of the hard fruit shells to the phosphoric acid solution is 1:(2-4); putting filter residues obtained by filtering into a muffle furnace for activating, and then cooling to the room temperature so as to obtain an activator; and washing the activator with water to be neutral, and then, drying and sieving so as to obtain the active carbon. The method provided by the invention is simple in process, convenient in operation, wide in raw material source and low in cost; and the prepared active carbon has a high specific surface area, a high specific pore volume and an excellent adsorptive capacity.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon with high adsorption capacity, 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] The specific surface area ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342
CPCC01P2006/12C01P2006/14
Inventor 叶孙龙
Owner 句容市百诚活性炭有限公司
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