A kind of preparation method of pitch-based spherical activated carbon with environmental protection and pore structure

A technology of spherical activated carbon and pore structure, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high cost, long preparation cycle, complex process, etc., reduce raw material cost, benefit environmental protection, source wide range of effects

Active Publication Date: 2021-05-07
平罗县盛达活性炭有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation of modified pitch-based spherical activated carbon is carried out in steps. First, activated carbon is prepared, and then substances with catalytic properties are introduced. The preparation cycle is long, the process is complicated, and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1. Preparation of raw materials: Coal tar pitch with a softening point of 180°C, coal tar pitch with a softening point of 60°C, and dry sorrel powder with a maximum particle size and diameter not higher than 0.01mm, according to a mass ratio of 1:0.5:0.05 , heating the mixture to 90° C., mechanically stirring for 1 hour, and mixing evenly. The sorrel grass is planted in copper-contaminated soil, and its plants contain 1.60 mg / g copper.

[0041] Step 2: Spray granulation and recover coal tar pitch, put the raw material prepared in step 1 into a spray granulator, heat the raw material to 140°C, and spray granulate in a drying room at 160°C with a spray pressure of 0.1Mpa , the hot air temperature is 160°C, the microsphere powder of coal tar pitch with a particle size of 0.12-0.18mm is produced, the sphericity is 91%, the air collection temperature is 20°C, and the coal with a softening point of 60°C is collected in the recovery air collection device Bitumen, its reco...

Embodiment 2

[0047] Step 1, raw material preparation, the softening point is the coal tar pitch of 220 ℃, the coal tar pitch that the softening point is 30 ℃ and the dried A. paniculata powder with particle size maximum diameter not higher than 0.01mm, according to mass ratio 1: 0.6:0.25, heat the mixture to 50°C, mechanically stir for 1 hour, and mix evenly. Among them, A. paniculata is planted in Pb, Zn and Cd polluted soil, and the Zn, Cd, and Pb contents of the plants are 720mg / g and 323mg / g , 1471 mg / g.

[0048] Step 2: Spray granulation and recover coal tar pitch, put the raw materials prepared in step 1 into a spray granulator, heat the raw materials to 160°C, and spray granulate in a drying room at 180°C with a spray pressure of 0.2Mpa , the hot air temperature is 180°C, the microsphere powder of coal tar pitch with a particle size of 0.16-2.2mm is produced, the sphericity is 92%, the air collection temperature is 22°C, and the coal with a softening point of 30°C is collected in th...

Embodiment 3

[0054] Step 1, raw material preparation, the coal tar pitch with a softening point of 220°C, the coal tar pitch recovered in Example 1 with a softening point of 60°C, and the dried oriental cattail powder with a maximum particle diameter not higher than 0.01mm, According to the mass ratio of 1:0.5:0.3, at 30°C, mechanically stir for 3 hours to carry out uniform mixing, wherein oriental cattail is planted in soil polluted by manganese, zinc, and cadmium, and its plants contain 12 mg / g of manganese;

[0055] Step 2: Spray granulation and recover coal tar pitch, put the raw materials prepared in step 1 into a spray granulator, heat the raw materials to 140°C, and spray granulate in a drying room at 160°C with a spray pressure of 0.3Mpa , the hot air temperature is 160°C, and the microsphere powder of coal tar pitch with a particle size of 1.8-2.3 mm is produced. Due to the volatilization of coal tar pitch with a softening point of 60°C, the microspheres have certain pores, and the...

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Abstract

The invention discloses a method for preparing pitch-based spherical activated carbon which is environmentally friendly and has a pore structure. The invention uses coal tar pitch with a softening point of 160-260°C, and coal tar pitch with a softening point of 30-60°C as solvent and pore-forming agent , using super-accumulated plants as catalytic metal raw materials, through mixing, spray granulation and recovery of coal tar pitch with a softening point of 30-60 °C, the microspheres were subjected to air oxidation, carbonization, water vapor activation and acid washing to obtain pitch-based spheres Activated carbon. The prepared pitch-based spherical activated carbon has a ball diameter of 0.1-2.0mm, a sphericity of 88-97%, and a density of 0.3-0.6g / cm 3 , The specific surface area is 900~1300m 2 / g, contains a large number of micropores and mesopores, and the macropore content is 8-16%. In this invention, the use of hyperaccumulator plants and the recovery and reuse of coal tar pitch with a softening point of 30-60°C avoid the use of metal salts and solvents, which not only reduces production costs, but also protects the environment and expands hyperaccumulation The use of plants is of great significance to the engineering and application of pitch-based spherical activated carbon.

Description

technical field [0001] The invention relates to a preparation method of pitch-based spherical activated carbon, in particular to a preparation method of modified pitch-based spherical activated carbon which is environmentally friendly and has a pore structure. Background technique [0002] Compared with ordinary granular activated carbon, columnar activated carbon or powder activated carbon, pitch-based spherical activated carbon has obvious performance advantages in terms of packing density, strength, and electrolysis. It has broad application prospects in key national defense projects, high-precision weapons and equipment, medicine, electronics, air and water purification, etc. [0003] Modified activated carbon, endowing activated carbon with new properties has become a research hotspot at home and abroad. Dong Shuangshi used the sol-gel method to convert TiO 2 doped with rare earth ions Er 3+ The up-converting luminescent agent Er 3+ :YAlO 3 combined, and then loaded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/336C01B32/33C01B32/318
CPCC01B32/318C01B32/33C01B32/336
Inventor 邱燕波
Owner 平罗县盛达活性炭有限公司
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