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Method for preparing active carbon by use of semicoke and coal tar and active carbon obtained by method

A technology for preparing activated carbon and activated carbon, which is applied in the field of activated carbon, can solve the problems of cumbersome procedures, low production efficiency, acid corrosion resistance, and alkali corrosion resistance, and achieve high production efficiency, high production efficiency and simple process

Active Publication Date: 2018-04-17
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional activated carbon preparation process has the following disadvantages: (1) A variety of chemical reagents (including acids, alkalis, activators, rinse agents, etc.) need to be used in the production process of activated carbon; (2) The production process is long and requires acid leaching Or multiple steps such as alkali immersion pretreatment, activation, rinsing, drying, etc., the process is cumbersome, the production efficiency is low, and the cycle is long; (3) the requirements for the device are relatively high (for example, the sealing requirements for gas protection, acid corrosion resistance , alkali corrosion resistance), so that the production cost is greatly increased

Method used

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  • Method for preparing active carbon by use of semicoke and coal tar and active carbon obtained by method
  • Method for preparing active carbon by use of semicoke and coal tar and active carbon obtained by method
  • Method for preparing active carbon by use of semicoke and coal tar and active carbon obtained by method

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preparation example Construction

[0040] The method for preparing activated carbon according to the present invention has at least the following three advantages: (1) there are fewer types of raw materials and relatively low prices, semi-carbon small materials, coal tar and water; (2) the process is simple and the production cycle is short; (3) The requirements for the device are relatively low, and no special corrosion-resistant device is required. The method of the invention can improve the production efficiency of the activated carbon, reduce the production cost, increase the added value of the product of the coking plant, prolong the industrial chain and improve the economic benefit.

[0041] In another aspect, the invention provides activated carbon obtained according to the method of the invention. The activated carbon obtained according to the method of the invention exhibits a very high adsorption and mechanical strength. Preferably, the activated carbon of the present invention has a particle strengt...

Embodiment 1

[0054] The semi-coke small material is crushed with a pulverizer until 95% of the particles pass through a 100-mesh sieve. According to the weight ratio of semi-coke small material: coal tar: water of 62:28:10, coal tar and water are added to the broken semi-coke small material. Knead the mixture evenly in the kneading pot for at least 20 minutes, and the kneading temperature is 30-50°C. Use an extruder to make the material into strips with a diameter of about 3mm. In a carbonization furnace, at a temperature of 150-200°C, pre-oxidize with air for 90 minutes, and then carbonize at 850°C for 2 hours. After cooling, activated carbon is obtained. The performance of the prepared activated carbon product is as follows:

[0055] Granular strength (%) 96.3

[0056] Iodine adsorption value (mg / g) 836.29

Embodiment 2

[0058] The semi-coke small material is crushed with a pulverizer until 95% of the particles pass through a 100-mesh sieve. According to the weight ratio of semi-coke small material: coal tar: water of 62:28:10, coal tar and water are added to the broken semi-coke small material. Knead the mixture evenly in the kneading pot for at least 20 minutes, and the kneading temperature is 30-50°C. Use an extruder to make the material into strips with a diameter of about 3mm. In the carbonization furnace, the temperature is 150-200°C, the air is pre-oxidized for 90 minutes, and then carbonized at 850°C for 2.5 hours. After cooling, activated carbon is obtained. The performance of the prepared activated carbon product is as follows:

[0059] Granular strength (%) 97.6

[0060] Iodine adsorption value (mg / g) 907.54

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Abstract

The invention relates to a method for preparing active carbon by the use of semicoke and coal tar and the active carbon obtained by the method. The method of the invention comprises the following steps: (1) pretreatment: crushing semicoke until D95 of particles is less than or equal to 0.15 mm; (2) moulding: uniformly mixing the particles obtained in the step (1) and medium and low temperature coal tar and water, and carrying out extrusion moulding on the mixture to obtain an active carbon precursor, wherein weight ratio of the particles to the medium and low temperature coal tar is within therange of 1.5-3.0:1; and (3) charing: carrying out air pre-oxidation on the active carbon precursor at the temperature of 150-200 DEG C, charing at 780-920 DEG C, and cooling to obtain the active carbon. The method of the invention has the following characteristics: production technology is simplified; production efficiency is raised; production cost is reduced; and the prepared active carbon hasvery good mechanical strength and adsorptive property.

Description

technical field [0001] The invention relates to activated carbon preparation technology, in particular to a method for preparing activated carbon by using blue charcoal small material and coal tar, and the activated carbon obtained by the method. Background technique [0002] Blue coke is a low volatile solid carbon product obtained by dry distillation and pyrolysis of non-caking or weakly caking high-volatile bituminous coal under medium and low temperature conditions. Semi-coke is widely used in the production of calcium carbide, ferroalloy, ferrosilicon, silicon carbide and other products, and its appearance is light black block semi-coke. According to the particle size, semi-coke can be roughly divided into large-block semi-coke, medium-block semi-coke, small-block semi-coke (or semi-coke small material), semi-coke powder (coke powder or burnt surface). In the production of semi-coke, it will be accompanied by the production of coal tar as a by-product. With the advant...

Claims

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Application Information

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IPC IPC(8): C01B32/33C01B32/342
Inventor 赵宁刘东
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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