Preparation method of asphalt-base hollow spherical active carbon

A spherical activated carbon and pitch-based technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems that the preparation technology of pitch-based activated carbon has yet to be developed, and achieve environmental protection, extensive sources of pitch, low cost The effect of production costs

Inactive Publication Date: 2019-01-22
宁波设会物联网科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the preparation and application of pitch-based spherical activated carbon have been widely studied and applied, and the preparation technology of pitch-based activated carbon with hollow spherical shape is yet to be developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1. Preparation of raw materials: 100 g of coal tar pitch with a softening point of 160° C. and 50 g of coal tar pitch with a softening point of 30° C. were mechanically stirred for 1 hour at 40° C. for uniform mixing.

[0043] Step 2: Spray granulation and recover coal tar pitch, put the raw material prepared in step 1 into the spray granulator, heat the raw material to 120°C, spray granulation in a drying room at 120°C with a spray pressure of 0.1Mpa , the hot air temperature is 120°C, and 94g of coal tar pitch microsphere powder with a particle size of 0.12-0.18mm is produced, the sphericity is 89%, the air collection temperature is 20°C, and the softening point is 30°C collected in the recovery air collection device. Coal tar pitch 40g, its recovery rate is 80%.

[0044] Step 3: Coal tar pitch microspheres do not melt, put the coal tar pitch microsphere powder produced in step 2 in a non-melting furnace, take room temperature as the initial temperature, raise th...

Embodiment 2

[0049] Step 1. Preparation of raw materials: 100 g of coal tar pitch with a softening point of 360° C. and 70 g of coal tar pitch with a softening point of 90° C. were mechanically stirred for 1 hour at 100° C. for uniform mixing.

[0050] 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 130°C, and spray granulate in a drying room at 200°C with a spray pressure of 0.5Mpa , the hot air temperature is 200°C, and 95g of coal tar pitch microsphere powder with a particle size of 0.12-0.18mm is produced, the degree of sphericity is 89%, the air collection temperature is 20°C, and the softening point is 90°C collected in the recovery air collection device Coal tar pitch 64.2g, its recovery rate is 92%.

[0051] Step 3: Coal tar pitch microspheres do not melt, put the coal tar pitch microsphere powder produced in step 2 in a non-melting furnace, take room temperature as the initial temperatu...

Embodiment 3

[0057] Step 1. Raw material preparation, 100g of coal tar pitch with a softening point of 360°C and 50g of natural asphalt with a softening point of 90°C were mechanically stirred for 1 hour at 100°C for uniform mixing.

[0058] Step 2: Spray granulation and recover coal tar pitch, add the raw material prepared in step 1 into the spray granulator, heat the raw material to 130°C, spray granulation in a drying room at 210°C with a spray pressure of 0.5Mpa , the hot air temperature is 210°C, and 96g of coal tar pitch microsphere powder with a particle size of 0.12-0.18mm is obtained, the degree of sphericity is 92%, the air collection temperature is 20°C, and the softening point is 90°C collected in the recovery air collection device. Coal tar pitch 41g, its recovery rate is 92%.

[0059] Step 3, coal tar pitch microspheres do not melt, put 96g of coal tar pitch microsphere powder produced in step 2 in a non-melting furnace, take room temperature as the initial temperature, raise...

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Abstract

The invention discloses a preparation method of asphalt-base hollow spherical active carbon. The asphalt-base hollow spherical active carbon is prepared from high-softening-point asphalt by taking low-softening-point asphalt as a solvent as well as a perforating agent through mixing, spray granulation, recovery of the low-softening-point asphalt, oxidization, carbonization, water steam activationand acid pickling. The prepared asphalt-based hollow spherical active carbon is 0.1 to 2.0mm in spherical diameter, is 0.7 to 1.0mm in spherical wall thickness, is 88 to 97 percent in spherical degree, is 0.1 to 0.3g/cm<3> in density, is 1300 to 1600m<2>/g in specific surface area, and contains a large quantity of micropores, mesopores and macropores of not greater than 15 percent. The prepared hollow spherical active carbon has the characteristics of low density, large specific surface area, insusceptibility to damage and the like. The low-softening-point asphalt is recovered to avoid the useof a solvent, so that the production cost is lowered, the environment is protected, and the preparation method has important significance to the engineering and application of the asphalt-based spherical active 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 pitch-based hollow spherical activated carbon. 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] In order to improve the electrochemical performance of ordinary activated carbon materials, Zeng Jun used Ni(NO 3 ) 2 Activated carbon was modified by solution impregnation and high temperature pyrolysis. Using nitrogen adsorption method, SEM, XPS and other methods to analyze and study the specific surface area, pore structure, morphology and comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/33
CPCC01B32/33C01B32/342
Inventor 邱燕波
Owner 宁波设会物联网科技有限公司
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