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Composite modified coal tar pitch and its preparation method

A compound modification and coal tar pitch technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of complicated process and poor modification effect of coal tar pitch, and achieve simple processing, reducing the content of toxic substances, The effect of the modification effect is obvious

Active Publication Date: 2016-05-25
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to use a large amount of organic solvent, and the process is complicated
[0006] In summary, the current modification effect on coal tar pitch is not very good, there are many problems, and the toxicity of coal tar pitch cannot be effectively solved.

Method used

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  • Composite modified coal tar pitch and its preparation method

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preparation example Construction

[0020] The preparation method of composite modified coal tar pitch of the present invention comprises the following steps: coal tar pitch, residual oil, and at least one selected from modifying agent, macromolecular material and additive are added in the reactor, and the reaction time is 0.1-7 hours, the temperature is 90-280°C.

[0021] The reaction time is preferably 0.5-5 hours, more preferably 0.5-3 hours. The temperature is preferably 100-250°C, more preferably 100-200°C, further preferably 100-180°C.

[0022] The preparation method of the composite modified coal tar pitch of the present invention comprises the following steps: adding the coal tar pitch and the modifier into the reactor, reacting for 0.1-2 hours, controlling the temperature at 90-280°C to make it fully react, and then Add residual oil, mix for 0.1-2 hours, control the temperature at 90-280°C, finally add polymer materials and additives and continue mixing for 0.1-3 hours.

[0023] The coal tar pitch has...

Embodiment 1

[0030] Add 70wt% medium-temperature coal tar pitch and 4wt% polyethylene glycol (600) into the reactor according to the above ratio, react for 0.7 hours, and control the temperature at 145°C to make it fully react, then add 25wt% residual oil, and mix for 0.5 hours , the temperature was controlled at 120°C, and finally 1 wt% elemental sulfur was added, and the mixing was continued for 0.5 hours.

Embodiment 2

[0032] Add 67.5wt% medium-temperature coal tar pitch and 2wt% paraformaldehyde into the reactor according to the above ratio, react for 0.5 hours, and control the temperature at 115°C to make it fully react, then add 27wt% residual oil, mix for 0.5 hours, and control the temperature At 145°C, a final 3.5 wt% polystyrene was added and mixing was continued for 0.5 hours.

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Abstract

The invention relates to a compound modified coal pitch and a preparation method thereof. The compound modified coal pitch, based on the total weight of the compound modified coal pitch, contains 20-80wt % of a coal pitch, 10-70wt % of residual oil, 0-20wt % of polymer materials, 0-20wt % of a modifier and 0-5wt % of additives.

Description

technical field [0001] The invention relates to a coal tar pitch, in particular to a composite modified coal tar pitch and a preparation method thereof. Background technique [0002] Coal tar pitch, also known as coal tar pitch, is a by-product of coal tar distillation produced in the deep processing of coal, and is a bulk product produced in the process of coal tar processing. At present, the output of coal tar in my country is about 6 million tons. Therefore, how to effectively utilize these coal tar pitch resources has become the focus of attention of the coal processing industry. [0003] In recent years, the scale of road construction in my country has been very large, requiring a large amount of road asphalt. However, oil resources are becoming increasingly scarce, international crude oil prices continue to rise, and the supply of petroleum-based asphalt is also tight. Therefore, it is necessary to make full use of my country's coal resource advantages, develop road...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L71/08C08L59/02C08L21/00C08L25/06
Inventor 曹东伟吴小维李佰昌何敏张海燕张艳君
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT