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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 asphalt/petroleum asphalt/natural asphalt by distillation, processing tar asphalt/petroleum asphalt/natural asphalt by chemical methods, and processing tar asphalt/petroleum asphalt/natural asphalt by selective extraction and other directions, which can solve the problems of poor adhesion and poor applicability of product development, etc., and achieve the effect of good adhesion performance

Active Publication Date: 2015-06-03
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 too 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

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

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preparation example Construction

[0027] 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, a crosslinking agent, and a catalyst to obtain a mixture. The softening point of the above-mentioned high-temperature asphalt is 115-160° C., and the content of beta resin is 5-15 wt%. The ash content value is ≤0.5wt%; S2, heating and melting the above mixture to obtain a molten mixture; and S3, performing crosslinking polymerization on the above molten mixture at 80-120° C. to obtain modified asphalt.

[0028] 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%. In the prior art, the softening point of raw materials for preparing modified asphalt is as high as 75-95°...

Embodiment 1

[0046] Add the above-mentioned high-temperature asphalt with a particle size of 0.2mm, anthracene oil, paraformaldehyde, and p-toluenesulfonic acid into the stirring tank according to the proportions in Table 1, and under the protection of a nitrogen atmosphere, at a rate of 1°C / min The heating rate (V1) was raised to 120°C (T1) for melting, and stirred at a stirring speed of 100r / min for 60 minutes to obtain a molten mixture; then the temperature was lowered to 80°C (T2) at a cooling rate of 1°C / min (V2), And carry out cross-linking polymerization at this temperature until the material cannot be stirred, stop heating, and obtain the modified asphalt of Example 1.

Embodiment 2

[0048] Add the above-mentioned high-temperature asphalt with a particle size of 5mm together with catalytic cracking oil slurry, paraformaldehyde, and p-toluenesulfonic acid into the stirring tank according to the proportioning in Table 1, and under the protection of a nitrogen atmosphere, according to Example 1 The steps are prepared with the parameters in Table 1 to obtain the modified asphalt of Example 2.

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Abstract

The invention discloses modified asphalt and a preparation method thereof. The method comprises the following steps: S1, mixing high-temperature asphalt, heavy oil, crosslinking agent and a catalyst to form a mixture, wherein the softening point of the high-temperature asphalt is 115-160 DEG C, the beta resin content value is 5-15 wt%, and the ash content value is no more than 0.5 wt%; S2, heating to melt the mixture, thus obtaining a molten mixture; and S3, performing crosslinking polymerization on the molten mixture at 80-120 DEG C to obtain the modified asphalt. According to the invention, the heavy oil and crosslinking agent are added into the high-temperature asphalt used as a raw material, slow heating is performed to obtain molten asphalt, and then, crosslinking polymerization reaction is performed on the high-temperature asphalt under the action of the catalyst, thus obtaining the modified asphalt which has low softening point and high beta resin content; and the modified asphalt having high beta resin content has favorable binding property and can be used as medium-and-high-temperature binding agent asphalt and impregnated asphalt required in 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 Patents(China)
IPC IPC(8): C10C3/02C10C3/08C10C3/06
Inventor 李克健章序文舒成程时富常鸿雁周颖
Owner CHNA ENERGY INVESTMENT CORP LTD