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A method for preparing millimeter-scale pitch balls containing naphthalene pitch micropowder

A technology of naphthalene pitch and pitch balls, which is applied in the field of preparation of pitch balls, can solve the problems of high preparation cost and waste generation, and achieve the effects of increasing production capacity, reducing costs, and speeding up the rate of oxidation and non-melting

Active Publication Date: 2019-01-11
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

Then, the asphalt powder that is not suitable for pelletizing, especially the micron-sized micropowder material, becomes waste, which makes its preparation cost high and waste is generated at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 5 liters of 63wt% HNO 3 Add 50 meshes of 1kg naphthalene-pitch-containing micropowder, wherein naphthalene accounts for 50% of the total weight of naphthalene-pitch-containing micropowder, leave it at room temperature for 3h, after solid-liquid separation, wash with deionized water until the pH is neutral, and dry; Asphalt powder: naphthalene: polyvinyl alcohol: ethanol = 1:0.1:0.4:0.5 mass ratio Add the above materials into an autoclave filled with water 50 times the weight of asphalt powder, start stirring after sealing, and the stirring rate is 50 rpm At a rate of 0.5 °C / min to 70 °C for 5 hours, then at a rate of 2 °C / min to 120 °C for 2 hours, then lower the temperature and separate the solid and liquid to obtain millimeter-sized asphalt balls; Add 2 liters of 40wt% HNO to the asphalt pellets 3 , reacted at 25°C for 10 hours, after solid-liquid separation, directly passed 100 liters of air, and raised the temperature from room temperature to 150°C at a rate of 0.2...

Embodiment 2

[0022] 400 liters of 40wt% HNO 3 Add 270 meshes of 10kg naphthalene-pitch-containing micropowders, wherein naphthalene accounts for 15% of the total weight of naphthalene-pitch-containing micropowders, leave it at room temperature for 30h, and after solid-liquid separation, wash with deionized water until the pH is close to neutral, and dry; Asphalt powder: naphthalene: sodium octadecylbenzenesulfonate: methanol = 1:0.5:0.1:3 mass ratio Add the above materials into the autoclave filled with water 300 times the weight of asphalt powder, start stirring after sealing, and stir The speed is 500 rpm, and the heating rate is raised to 110°C at a rate of 5°C / min for 1 hour, and then the temperature is increased to 170°C at a rate of 10°C / min for 0.5 hours, then the temperature is lowered, and the solid-liquid separation is obtained. Pitch balls; add 100 liters of 20wt% HNO to the millimeter-scale pitch balls 3 , react at 80°C for 1 hour, after solid-liquid separation, directly pass ...

Embodiment 3

[0025] 2000 liters of 50wt% HNO 3 Add 100 kg of naphthalene-pitch-containing micropowders of 90 meshes, wherein naphthalene accounts for 30% of the total weight of naphthalene-pitch-containing micropowders, leave standstill at room temperature for 10 h, and after solid-liquid separation, wash with deionized water until the pH is close to neutral, and dry; Asphalt powder: naphthalene: polyvinyl alcohol: ethylene glycol = 1:0.3:0.2:1 mass ratio Add the above materials into an autoclave filled with water 100 times the weight of asphalt powder, start stirring after sealing, and the stirring rate is 300 Turn per minute, raise the temperature at a rate of 3 °C / min to 90 °C and stay for 3 hours, then increase the rate of temperature at 5 °C / min to 150 °C and stay for 1 hour, then cool down and separate solid and liquid to obtain millimeter-sized asphalt balls; Add 500 liters of 30% HNO3 to millimeter-sized asphalt spheres, react at 50°C for 3 hours, and after solid-liquid separation,...

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Abstract

A method for preparing millimeter-sized asphalt balls from naphthalene-containing asphalt micropowder comprises steps as follows: HNO3 is added to the naphthalene-containing asphalt micropowder, and the asphalt micropowder is left to stand at the room temperature, subjected to solid-liquid separation, washed with deionized water to be neutral and dried; and the millimeter-sized asphalt-based activated carbon balls are prepared after micropowder balling, oxidation without melting, carbonization and activation treatment. The method has the advantages of being low in cost and free of waste.

Description

technical field [0001] The invention belongs to a method for preparing asphalt balls, in particular to a method for preparing millimeter-sized asphalt balls from naphthalene-containing asphalt micropowder. Background technique [0002] The preparation of spherical activated carbon from asphalt is the current method of high value-added asphalt, which can not only significantly increase the added value of asphalt in the coking industry, but also improve the product structure of current activated carbon enterprises and enhance their core competitiveness. [0003] Chinese invention patent 200410100531 "Method for preparing spherical activated carbon" is to use heavy hydrocarbon oil level raw materials such as petroleum tar, coal tar, low softening point asphalt or naphtha ethylene residues, by using an oxidant such as HNO 3 , air, etc. to oxidize to obtain oxidized asphalt, and then modify it with aromatic hydrocarbons such as naphthalene, extrude at a certain temperature, break...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/14
CPCC10C3/14
Inventor 李开喜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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