Low energy one-step method for preparing asphalt balls

A technology of asphalt balls and low energy consumption is applied in the field of one-step emulsification to prepare asphalt balls, which can solve the problems of high energy consumption, low heavy metal content and demand, and achieve the effects of low energy consumption, high safety, and reduced product cost.

Active Publication Date: 2014-04-02
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

[0003] There are many patents for preparing spherical activated carbon with asphalt as the precursor. In the Chinese invention patent 201010143602 "a method for preparing asphalt spheres", the viscosity reducer is melted in advance and mixed with high softening point asphalt to obtain modulated asphalt, and then the asphalt enters the Under the liquid surface of the suspension medium, it is heated and stirred into balls, that is, at least 2 steps are used to obtain asphalt balls; Chinese invention patent 201210317727 "Preparation method of pitch-based spherical activated carbon with low energy consumption" uses curing agent and high softening point pitch first After mixing evenly, add it to the polyvinyl alcohol solution at 80-95°C and stir, then transfer it to a hydrotherm

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0013] Add pitch, naphthalene, polyvinyl alcohol and water with a weight ratio of 1:0.35:0.01:20 and a softening point of 230°C directly into the reactor, and raise the temperature to 75°C at a stirring rate of 200 rpm and stay for 5 hours. Then the solid-liquid separation is carried out directly without cooling down, and asphalt balls with a ball diameter of 1.3-1.5 mm up to 89% and a sphericity of 95% are obtained.

Embodiment 2

[0015] Add pitch, naphthalene, sodium octadecylsulfonate and water with a weight ratio of 1:0.4:0.1:30 and a softening point of 280°C directly into the reactor, and heat up to 80°C at a stirring rate of 300 rpm. ℃ and stay for 3 hours, and then directly carry out solid-liquid separation without cooling down, and obtain asphalt balls with a ball diameter of 0.8-1.1mm up to 92% and a sphericity of 92%.

Embodiment 3

[0017] Add pitch, naphthalene, polyethylene glycol and water with a weight ratio of 1:0.5:0.3:40 and a softening point of 290°C directly into the reactor, and raise the temperature to 95°C at a stirring rate of 500 rpm and stay for 4 hours , and then directly carry out solid-liquid separation without cooling down to obtain asphalt balls with a ball diameter of 0.3-0.5mm up to 95% and a sphericity of 98%.

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Abstract

The invention relates to a low energy one-step method for preparing asphalt balls. The method comprises steps of directly adding high softening point asphalt, naphthaline, dispersing agent and water into a normal pressure reaction kettle according to weight ratio of 1:(0.35-0.5):(0.01-0.3):(20-40), rising temperature up to 75-95DEG C at stirring rate of 200-500rpm, keeping warm for 1-5 hours at the temperature, then separating solid and liquid directly without cooling down so as to obtain the asphalt balls. The one-step method has the advantages of directly preparing the asphalt balls by one step, having low equipment cost due to the use of normal pressure reaction kettle, and having high safety and low energy consumption.

Description

technical field [0001] The invention belongs to a technology for preparing asphalt balls, in particular to a technology for preparing asphalt balls by one-step emulsification. Background technique [0002] Pitch-based spherical activated carbon is a high-performance activated carbon that is used in many fields. The precursor prepared by it is asphalt, which is further turned into asphalt balls to prepare spherical activated carbon. Therefore, the preparation of asphalt balls is necessary. [0003] There are many patents for preparing spherical activated carbon with asphalt as the precursor. In the Chinese invention patent 201010143602 "a method for preparing asphalt spheres", the viscosity reducer is melted in advance and mixed with high softening point asphalt to obtain modulated asphalt, and then the asphalt enters the Under the liquid surface of the suspension medium, it is heated and stirred into balls, that is, at least 2 steps are used to obtain asphalt balls; Chines...

Claims

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Application Information

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IPC IPC(8): C10C3/16
Inventor 李开喜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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