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Modified asphalt and preparation method thereof

A technology for modifying asphalt and high-temperature asphalt, which is applied to processing tar pitch/petroleum pitch/natural pitch by distillation, processing tar pitch/petroleum pitch/natural pitch by chemical methods, and processing tar pitch/petroleum pitch/natural pitch by selective extraction and other directions, can solve the problems of poor applicability and poor adhesion of product development, achieve the effect of low softening point and avoid volatilization loss

Active Publication Date: 2014-04-23
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has been no report on the modification of high-temperature asphalt with high softening point (115-160°C) and low β resin content (5-15wt%). Such high-temperature asphalt with high softening point has poor cohesiveness. The disadvantages of product development are not strong, and it is not suitable as raw materials for tamping coking, activated carbon and graphite electrode binders, waterproof membranes, waterproof coatings, etc., so it needs to continue to be modified to meet market needs

Method used

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  • Modified asphalt and preparation method thereof
  • Modified asphalt and preparation method thereof
  • Modified asphalt and preparation method thereof

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preparation example Construction

[0032] In a typical embodiment of the present invention, a method for preparing modified asphalt is provided. The preparation method includes the following steps: S1, mixing high-temperature asphalt with heavy oil and a cross-linking agent to obtain a mixture, the softening point of the high-temperature asphalt is 115-160°C, the content of beta resin is 5-15wt%, and the ash content is ≤0.5 wt%; S2, the mixture is subjected to stage-by-stage cross-linking polymerization under the action of a catalyst to obtain modified asphalt. The cross-linking polymerization temperature of different stages is different and the cross-linking polymerization temperature of each stage is between 60 and 180 °C.

[0033] As described in the background technology of the present invention, the softening point of the high-temperature bitumen produced from the residue of direct coal liquefaction is 115-160°C, the content of β resin is 5-15wt%, and the ash content is ≤0.5wt%. Compared with the prior art ...

Embodiment 1

[0056] According to attached figure 1 According to the preparation process shown in , 50 g of the above-mentioned high-temperature pitch with a particle size of 0.2 mm is mixed with 2.5 g of anthracene oil and 0.5 g of paraformaldehyde to obtain a mixture; the mixture is added to a stirring tank, and under the protection of a nitrogen atmosphere, the ℃ / min heating rate (V1) to 60°C (T1), add 0.5g p-toluenesulfonic acid, cross-linking polymerization lasts 10min, then raise the temperature to 80°C (T2), then add 0.5g p-toluenesulfonic acid Sulfonic acid, cross-linking polymerization continued for 10 minutes, then the temperature was raised to 100°C (T3), and then 1 g of p-toluenesulfonic acid was added, cross-linking polymerization continued for 60 minutes, and heating was stopped to obtain the modified asphalt of Example 1.

Embodiment 2

[0058] According to attached figure 1 In the preparation process shown in , select the above-mentioned high-temperature asphalt with a particle size of 0.5mm as raw material, select the heavy oil, crosslinking agent and catalyst type in Example 2 in Table 1, and use the corresponding parameters in Table 2 according to Example 1 The steps are prepared to obtain the modified asphalt of Example 2.

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Abstract

The invention discloses modified asphalt and a preparation method thereof. The preparation method comprises the following steps: S1. mixing high temperature asphalt with heavy oil and a cross-linking agent to obtain a mixture, wherein the softening point of the high temperature asphalt is 115-116 DEG C, the content of beta resin is 5-15 wt%, and the ash content is not greater than 0.5 wt%; S2. carrying out segmented cross-linking polymerization on the mixture under the action of a catalyst to obtain modified asphalt, wherein the cross-linking polymerization temperatures in different stages are different, and the cross-linking polymerization temperatures in the stages are 60-180 DEG C. According to the preparation method disclosed by the invention, the cross-linking polymerization is carried out in stages to avoid large amount of volatilization loss of the cross-linking agent due to high temperature caused by direct heating, the reaction conditions in the stages can be flexibly controlled to obtain the modified asphalt, which can meet the market demand and has decreased softening point and increased beta resin content, and the modified asphalt has good caking property, thereby being available as medium and high temperature binder asphalt and impregnated asphalt needed on the market.

Description

technical field [0001] The invention relates to the technical field of asphalt deep processing, in particular to a modified asphalt and a preparation method 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 resources and the tight supply and demand of petroleum products. First, it is also an important me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02C10C3/08C10C3/06
Inventor 舒成李克健章序文程时富常鸿雁周颖
Owner CHNA ENERGY INVESTMENT CORP LTD
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