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Modified bitumen, modification method and application of high temperature bitumen for direct coal liquefaction

A technology for direct liquefaction of coal and high-temperature pitch, which is applied in the direction of chemically processing tar pitch/petroleum pitch/natural pitch, etc., to achieve the effects of low softening point, easy to scale up production, and conventional equipment.

Active Publication Date: 2015-11-11
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to reduce the softening point of direct coal liquefaction high-temperature asphalt and at the same time increase its β resin content and carbon residue rate only by the above three methods
So far, there are few reports on how to modify coal liquefaction high-temperature asphalt with high softening point (115-160°C) and low β-resin content (5-15wt%)

Method used

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  • Modified bitumen, modification method and application of high temperature bitumen for direct coal liquefaction
  • Modified bitumen, modification method and application of high temperature bitumen for direct coal liquefaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The coal direct liquefaction residue was processed by thermal extraction, solid-liquid separation, and vacuum distillation to obtain direct coal liquefaction high-temperature pitch with an ash content of 0.45wt%, a β resin content of 7wt%, and a softening point of 130°C.

[0040] 1) Add 200Kg coal direct liquefaction high-temperature asphalt, anthracene oil and cross-linking agent tere-phenylenedimethanol into a stirring tank, stir and mix to obtain the first mixture. The added anthracene oil is 70wt% of the direct coal liquefaction high temperature asphalt, and the terephthalmic alcohol is 10wt% of the coal direct liquefaction high temperature asphalt. The first mixture was placed under a nitrogen atmosphere, heated to 160° C. at a heating rate of 5° C. / min, and stirred at constant temperature for 1 hour to obtain a second mixture.

[0041] 2) Add sulfuric acid (concentration: 70wt%) accounting for 10wt% of direct coal liquefaction high-temperature asphalt to the secon...

Embodiment 8

[0049] Firstly, the direct coal liquefaction residue is used for thermal extraction, solid-liquid separation, and vacuum distillation to obtain direct coal liquefaction high-temperature pitch. The ash content is 0.35wt%, the β resin content is 5wt%, and the softening point is 115°C.

[0050] 1) Add 200Kg of the above-mentioned coal liquefaction high-temperature pitch, 100Kg of anthracene oil and 2Kg of terephthalmic alcohol into a stirring tank, stir and mix to obtain the first mixture. Under the protection of a nitrogen atmosphere, the temperature was raised to 200° C. at a heating rate of 1° C. / min and stirred at a constant temperature to obtain a second mixture.

[0051] 2) Add 2Kg of sulfuric acid with a concentration of 98wt% to the second mixture at 200°C, pressurize to 10Mpa and react for 36h, stop heating, and take out to obtain the coal direct liquefaction modified pitch. The measured softening point of coal direct liquefaction modified asphalt is 117°C, the content o...

Embodiment 9

[0053] The direct coal liquefaction high temperature bitumen is obtained by hot solution extraction, solid-liquid separation and vacuum distillation from the coal direct liquefaction residue, the ash content is 0.01wt%, the beta resin content is 15wt%, and the softening point is 160°C.

[0054] 1) Add 200Kg of the above-mentioned coal liquefaction high-temperature bitumen, 200Kg of vacuum residue and 100Kg of terephthalmic dimethanol into the stirring tank to obtain the first mixture. The first mixture was placed under a nitrogen atmosphere, and the temperature was raised to 350° C. at a heating rate of 10° C. / min for constant temperature stirring to obtain a second mixture.

[0055] 2) Then add 200Kg of sulfuric acid with a concentration of 40wt% to the second mixture, then pressurize to 5Mpa and react for 10h, stop heating, and take out the obtained coal liquefaction modified pitch. The measured softening point of the product is 112°C, the beta resin content is 27 wt%, and t...

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Abstract

The invention discloses modified asphalt, a modification method of direct coal liquefaction high-temperature asphalt and application thereof. The modification method comprises the following steps: S1, adding heavy oil and a cross-linking agent to the direct coal liquefaction high-temperature asphalt, stirring and mixing, so as to obtain a first mixture; S2, adding a catalyst to the first mixture, carrying out heating and pressure polymerization, so as to obtain direct coal liquefaction modified asphalt. The modified asphalt with a low softening point, high beta resin content and low quinoline insoluble matter content is obtained by carrying out heating and pressure polymerization reaction on the coal liquefaction high-temperature asphalt with a high softening point and low beta resin content. The product is strong in development applicability, and is a novel material with high performance and high additional value. The modification method has the advantages of being simple in process route, mild in condition, conventional in equipment, easy to amplify and produce and the like, and a new path is provided for deep utilization of the direct coal liquefaction high-temperature asphalt with the high softening point and low beta resin content, especially the direct coal liquefaction residue.

Description

technical field [0001] The invention relates to the technical field of deep processing of coal direct liquefaction residue, in particular to a modified asphalt, a modification method of direct coal liquefaction high-temperature asphalt and an application thereof. Background technique [0002] With the rapid development of the national economy, the process of modernization and social development continues to accelerate, my country's consumption of petroleum products continues to grow, greatly exceeding the growth rate of crude oil production during the same period, resulting in an increase in our petroleum imports year by year, and has exceeded the natural Yield. However, my country is a country rich in coal and poor in oil. Making full use of abundant coal resources and developing advanced clean coal technologies such as direct coal liquefaction is one of the important ways to reduce the excessive dependence on foreign crude oil and alleviate the shortage of my country's oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02
Inventor 李克健章序文舒成程时富常鸿雁周颖
Owner CHNA ENERGY INVESTMENT CORP LTD
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