Preparation method of bitumen balls

A technology of asphalt balls and asphalt, which is applied in the direction of solidification/crushing and processing tar asphalt/petroleum asphalt/natural asphalt, etc. It can solve the problems of mutual collision and adhesion of asphalt balls, rough surface of asphalt balls, complex process, etc., and achieve uniform ball diameter and surface The effect of smooth and simplified preparation process

Inactive Publication Date: 2010-08-04
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the surface of the asphalt balls prepared by the disc granulation method and the spray method is rough, and the formed asphalt balls are prone to collision and adhesion to form i

Method used

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  • Preparation method of bitumen balls
  • Preparation method of bitumen balls

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Embodiment 1

[0022] Embodiment 1, prepare asphalt ball

[0023] 1) Naphthalene (viscosity reducer) is placed in the reactor, heated to melt it, and under the condition of stirring, add petroleum asphalt with a softening point of 180° C. with a mass ratio of 70:30 to naphthalene in the reactor. After installing the reaction kettle, raise the temperature of the reaction kettle to 180°C at a stirring rate of 70r / min, keep the temperature constant for 1 hour, and cool down naturally to prepare modulated asphalt.

[0024] 2) Prepare 300 ml of an aqueous solution of polyvinyl alcohol (polymerization degree: 500) with a mass concentration of 5% as a suspension medium, and heat it to 80° C. at a stirring speed of 720 r / min.

[0025] 3) Heat the modulated asphalt prepared in step 1) to 110°C to make it have a certain fluidity, and use figure 1 The adding device shown absorbs 15g of prepared asphalt, and adds the prepared asphalt at a constant speed of 10ml / min below the surface of the suspension m...

Embodiment 2

[0026] Embodiment 2, prepare asphalt ball

[0027] 1) Put dimethylnaphthalene (viscosity reducer) in the reaction kettle, heat it to melt, and add the viscosity reducer to the reaction kettle with a mass ratio of 57:43 and a softening point of 280 ℃ coal tar pitch. After installing the reactor, raise the temperature of the reactor to 280°C at a stirring rate of 70r / min, keep the temperature constant for 2 hours, and cool down naturally to prepare modulated asphalt.

[0028] 2) Prepare 300 ml of 5% polyvinyl alcohol (polymerization degree 1000) aqueous solution as the suspension medium, and heat it to 85° C. at a stirring speed of 720 r / min.

[0029] 3) Heating the modulated asphalt prepared in step 1) to 180°C to make it have a certain fluidity, use figure 1 The adding device shown draws 10g of modulated asphalt, and adds the modulated asphalt at a constant speed of 6ml / min below the surface of the suspension medium; keep the temperature at 86°C for 10min, and then cool down...

Embodiment 3

[0030] Embodiment 3, prepare asphalt ball

[0031] 1) Put methylnaphthalene (viscosity reducer) in the reactor, heat it to melt it, and under the condition of stirring, add to the reactor the high Softening point asphalt, the asphalt is obtained by heat condensation at 400°C for 3 hours. After installing the reactor, raise the temperature of the reactor to 280°C at a stirring rate of 70r / min, keep the temperature constant for 1.5h, and cool down naturally to prepare modulated asphalt.

[0032] 2) Prepare 300 ml of 5% polyvinyl alcohol (polymerization degree: 2000) aqueous solution as a suspension medium, and heat it to 86° C. at a stirring speed of 720 r / min.

[0033] 3) Heating the modulated asphalt prepared in step 1) to 180°C to make it have a certain fluidity, use figure 1 The adding device shown draws 15g of modulated asphalt, and adds the modulated asphalt at a constant speed of 3ml / min below the liquid surface of the suspension medium; keep the temperature at 86°C for...

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Abstract

The invention discloses a preparation method of bitumen balls, which comprises the following steps: 1) putting viscosity depressants into a reaction kettle, heating and melting; under the condition of stirring, adding bitumen with high softening point; under the condition of stirring, heating the reaction kettle to a temperature not lower than the softening point of the bitumen with the high softening point and keeping the temperature for 1-3 hours; and cooling to obtain the prepared bitumen, wherein the softening point of the bitumen with high softening point is 180-300 DEG C; and 2) heating the prepared bitumen to 90-180DEG C, and enabling the bitumen has mobility, in the state of heat preservation, adding the prepared bitumen below the suspending medium liquid level of which the temperature is 80-90 DEG C, keeping for 1-10min at the temperature of 80-90 DEG C, and cooling to obtain the bitumen balls, wherein the suspending medium is polyving alcohol aqueous solution. The method of the invention has the characteristics of full utilization of raw materials of bitumen, reduced waste of raw materials, simple preparation process, and low production cost; and the bitumen ball prepared by the method is more uniform, and has smoother surface, thus avoiding the crash and adhesion of bitumen balls.

Description

technical field [0001] The invention relates to a preparation method of asphalt balls. Background technique [0002] Asphalt pellets are the precursor for the production of pitch-based spherical activated carbon, and their quality and specifications have an important impact on the performance and application of the final product. Therefore, the spheroidization of pitch is one of the key processes to prepare pitch-based spherical activated carbon with good sphericity and particle size distribution. At present, the spheroidization methods mainly include disc granulation method, spray method and suspension method. Among them, the surface of the asphalt balls prepared by the disc granulation method and the spray method is rough, and the formed asphalt balls are prone to collision and adhesion to form irregular different spheres; at the same time, these traditional processes have high energy consumption during the preparation process. Disadvantages such as high cost and complica...

Claims

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Application Information

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IPC IPC(8): C10C3/16
Inventor 王成扬张玉贞梁吉锋陈明鸣郑嘉明杨致华李明
Owner CHINA NAT OFFSHORE OIL CORP
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