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Preparation method of high performance active carbon

A kind of activated carbon, high-performance technology, applied in the field of preparation of high-performance activated carbon, can solve the problems of complicated production process, unfavorable smooth implementation, high production cost, etc., and achieve the effect of simple process, low production cost and low pollution degree

Inactive Publication Date: 2008-07-02
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patents all use acid and alkali to repeatedly treat the activated coal-based activated carbon to produce high-performance activated carbon, which not only causes a certain degree of pollution, but also greatly increases the production cost, and the production process is also very complicated. Conducive to the smooth implementation of industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Grind anthracite to 50-80 mesh, mix it with KOH in a weight ratio of 1:6, place it in the reactor, and feed it with N 2 Protection, rising from room temperature to 500°C at a rate of 2°C / min, constant temperature for 2h; then rising to 900°C at a rate of 5°C / min, constant temperature for 0.5h, and naturally cooling to room temperature to obtain an activated material. Wash the activation material with tap water until it is nearly neutral, then impregnate it with hydrochloric acid twice, each time for 3 hours, and then wash it with distilled water until it is neutral. After drying, the ash content is 1.8%, and the specific surface area is 3345m 2 / g of super activated carbon.

Embodiment 2

[0017] Embodiment 2: Grind the weakly caking coal to 80-120 mesh, mix it with KOH in a weight ratio of 1:1, place it in the reactor, feed N2 protection, and rise from room temperature to 650°C, constant temperature for 1h; then raise to 950°C at a rate of 8°C / min, constant temperature for 1h, cool down to room temperature naturally, to obtain activated material. Wash the activation material with tap water until it is nearly neutral, then use hydrochloric acid to impregnate it for 3 times, each time for 2 hours, and then wash it with distilled water until it is neutral. After drying, the ash content is 4.2%, and the specific surface area is 2438m 2 / g of super activated carbon.

Embodiment 3

[0019] Example 3: Grind the coking coal to 100-150 mesh, mix it with KOH in a weight ratio of 1:4, place it in the reactor, feed N2 protection, and rise from room temperature to 600°C at a rate of 10°C / min. Keep the temperature constant for 0.5h; then raise it to 800°C at a rate of 8°C / min, keep the temperature constant for 2h, and cool down to room temperature naturally to obtain the activated material. Wash the activation material with tap water until it is nearly neutral, then impregnate it with hydrochloric acid twice, each time for 2 hours, and then wash it with distilled water until it is neutral. After drying, the ash content is 3.5%, and the specific surface area is 2985m 2 / g of super activated carbon.

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Abstract

A preparation method of a high performance activated carbon is provided. Raw material coal is ground to 50-100 meshes and evenly mixed with KO according to weight ratio of 1:1-6. The mixture is placed in a reactor which is pumped in N2 for protection and heated according to a speed of 2-10 DEG C / min from room temperature to the temperature of 500 to 650 DEG C; the temperature is maintained for 0.5-2 hours; then the mixture is heated according to a speed of 5-10 DEG C to the temperature of 800 to 950 DEG C which is maintained for 0.5-2 hours and cooled to room temperature; an activated material is obtained, which is washed by water to a pH value of 7-7.5, then dipped with hydrochloric acid for 2-3 times and 2-3 hours each time, then washed by distilled water to be neutral and dried; the super activated carbon is obtained. The activated carbon prepared by the invention has the advantages that the ash content is small; the specific area is large; the method adopted is simple and accurate with small pollution degree, low cost and simple technical process, which is beneficial to successful implementation of industrialization.

Description

technical field [0001] The invention belongs to a preparation method of high-performance activated carbon. Background technique [0002] With the development of society, the improvement of people's living standards and the stricter environmental protection regulations, the application of activated carbon will expand to many fields, and the application of high-performance activated carbon will also show a rapid development. High-performance activated carbon requires high comprehensive performance, such as specific surface area, pore structure, ash content, etc., all require a reasonable value. At present, the raw materials that can be used to prepare high-performance activated carbon are mainly petroleum coke, resins, and coconut shell-based low-ash carbon-containing precursors. 200610139415 and 200510010965 use coconut shells. The common feature of the above-mentioned raw materials is that they contain little or no ash, and the final activated carbon has very little ash. Ho...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 李开喜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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