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Medium temperature coal pitch modification method and product

A technology of coal tar pitch and medium temperature, which is applied in the field of modification of medium temperature coal tar pitch, can solve the problems of complex modification process, difficult industrial application, expensive modifier, etc., and achieves simple process, increased β resin content, increased softening point and high temperature. The effect of the focus value

Inactive Publication Date: 2016-01-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modifiers used in the above method are more expensive, or the modification process is complicated, and it is difficult for industrial application

Method used

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  • Medium temperature coal pitch modification method and product
  • Medium temperature coal pitch modification method and product
  • Medium temperature coal pitch modification method and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the anhydrous AlCl 3 Mix with medium-temperature coal tar pitch crushed to a particle size below 0.1mm at a weight ratio of 6wt% in a V-type mixer for 60 minutes, and then send it into the reactor; freely raise the temperature to 100°C and keep it for half an hour, and then set the temperature at 5°C / min Raise the temperature to 220°C and keep it warm for 3 hours. After cooling, take out the modified coal tar pitch and wash it three times with hydrochloric acid with a concentration of 0.1mol / L to remove the modifier. This is the prepared modified coal tar pitch. attached figure 1 That is the optical microstructure of the prepared modified coal tar pitch after carbonization at 420°C for 60 minutes.

Embodiment 2

[0024] Anhydrous AlCl 3 Mix with medium-temperature coal tar pitch crushed to a particle size below 0.1mm at a weight ratio of 6wt% in a V-type mixer for 1 hour and then send it into the reactor; freely raise the temperature to 100°C and keep it for half an hour, and then set the temperature at 5°C / min Raise the temperature to 260°C and keep it warm for 3 hours. After cooling, take out the modified coal tar pitch and wash it three times with hydrochloric acid with a concentration of 0.1mol / L to remove the modifier. This is the prepared modified coal tar pitch. attached figure 2 This is the optical microstructure of the prepared modified coal tar pitch after being carbonized at 420°C for 60 minutes in a crucible resistance furnace.

Embodiment 3

[0026] Anhydrous AlCl 3 Mix with medium-temperature coal tar pitch crushed to a particle size below 0.1mm at a weight ratio of 6wt% in a V-type mixer for 1 hour and then send it into the reactor; freely raise the temperature to 100°C and keep it for half an hour, and then set the temperature at 5°C / min The heating rate was raised to 300°C, and the temperature was kept for 3 hours. After cooling, the modified coal tar pitch was taken out, and washed three times with hydrochloric acid with a concentration of 0.1mol / L to remove the modifier. The modified coal tar pitch was obtained. attached image 3 That is the optical microstructure of the prepared modified coal tar pitch after carbonization at 420°C for 60 minutes.

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Abstract

A medium temperature coal pitch modification method includes the following steps: (1) mixing anhydrous AlCl3 and medium temperature coal pitch which is crushed to the particle size of 0.1 mm or less according to the weight ratio of (2-12):100 in a V-shaped mixer, and then sending into a reaction kettle; (2) introducing N2 to exclude air in the reaction kettle, heating up to 100 DEG C, carrying out heat preservation for 25-35 min, then heating up to 200-320 DEG C, carrying out a reaction for 1-5 h, cooling, and then taking out; and (3) crushing the material obtained after reaction in the step (2), then washing with dilute hydrochloric acid, filtering, carrying out vacuum drying, removing the modifier AlCl3, and thus obtaining the modified medium temperature coal pitch. Compared with raw material pitch, the modified medium temperature coal pitch obtained from modification by the method has higher softening point and coking value, and especially has the QI and beta resin greatly improved; and with the modified medium temperature coal pitch as a binder, a carbon material with excellent structure and properties can be prepared.

Description

technical field [0001] The invention relates to the modification method and product field of medium-temperature coal tar pitch. Background technique [0002] At present, the relatively mature and widely used modified asphalt production technologies are thermal polymerization technology and hard asphalt vacuum flashing technology. These two technologies can improve the performance of coal tar pitch to a certain extent, but the degree of improvement is limited. Adding chemical active agents to coal tar pitch is the main direction of research on coal tar pitch modification. Using chemical active agents to modify coal tar pitch can not only promote the mutual crosslinking of coal tar pitch molecules, increase the average molecular weight of coal tar pitch, but also prevent the carbonization process. The volatilization of medium and light components increases the residual carbon rate of coal tar pitch. [0003] People such as B.Grzyb used polyacrylonitrile and polyvinylpyridine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02
Inventor 陈石林谢少朋郭建光李轩科
Owner HUNAN UNIV
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