A kind of warm mix flame retardant asphalt and preparation method thereof

An asphalt and warm mix technology, applied in the field of warm mix flame retardant asphalt and its preparation, can solve the problems of the degree of reaction between intermediates and aromatic hydrocarbon oil, the depth of reaction is not easy to control, the application effect of asphalt is affected, and the properties of warm mix agents are unstable. , to achieve the effect of improving anti-peeling and anti-water damage performance, improving thermal aging resistance, and improving anti-aging performance

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of the warm mix agent, not only the reaction speed of the intermediate is slow, but also the activity of the intermediate is low, resulting in the degree of reaction between the intermediate and the aromatic oil, and the depth of reaction is not easy to control, and the obtained warm mix agent is unstable. , affecting the application effect in asphalt

Method used

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Examples

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preparation example Construction

[0046] The concrete preparation method of warm mixing agent of the present invention comprises:

[0047] a. Heat and melt the mixed polymer alkanes and place them in a closed container, keep the temperature at 400°C~480°C, fill the space of the reaction container with protective gas (such as nitrogen), and keep the pressure at 3~5MPa, and put the halogen element Pass into the molten polymer alkanes, and in the presence of the first catalyst, react for 30-60 minutes to obtain the intermediate;

[0048] b. Add the complex compound to the aromatic hydrocarbon oil, and stir at a constant temperature of 270°C~350°C for 120~180min to obtain the aromatic hydrocarbon complex component;

[0049] c. Add the aromatic hydrocarbon complexing component to the above intermediate, make the temperature 350°C~400°C, fill with protective gas (such as nitrogen) to keep the pressure at 2~4MPa, and react at constant temperature for 60~120min to obtain the described warm mix.

[0050] Further, a s...

Embodiment 1

[0058] (1) Preparation of warm mix agent

[0059] a. Weigh 100kg of coal gasification and then carry out the synthesis reaction of mixed alkanes, the carbon number of mixed alkanes is 30-60, heat the mixed alkanes to 480°C, add 0.3kg of catalyst anhydrous CuCl 2 , placed in a closed container, maintain this temperature and introduce 89 moles of chlorine gas, and feed nitrogen to keep the pressure of the reaction container at 3MPa, and react for 30 minutes to obtain intermediate-1;

[0060] b. take by weighing aromatics content and be 700kg of the four-line extraction oil of 70 wt%, add 44.1kg of complexes [Cu(NH 3 ) 4 ] SO 4 , placed in another airtight container and heated to 350°C, and kept stirring at this temperature for 180min to obtain the aromatic hydrocarbon complex component-1;

[0061] c. Add aromatic hydrocarbon complexing component-1 to the above-mentioned intermediate-1, make the temperature 400°C, fill with nitrogen to keep the pressure at 2MPa, and react at c...

Embodiment 2

[0066] (1) Preparation of warm mix agent

[0067] a. Weigh 700kg of mixed alkanes obtained by synthetic reaction with natural gas as raw material, the carbon number of mixed alkanes is 110-130, heat the mixed alkanes to 400°C, add 2.1kg of catalyst anhydrous CrCl 3 , placed in a closed container, maintain this temperature to introduce 115 moles of bromine, and feed nitrogen to keep the pressure of the reaction container at 4MPa, react for 45min to obtain intermediate-2;

[0068] b. take by weighing the furfural refining extraction oil 100kg that aromatics content is 57wt%, add 1.7kg complex (NH 4 ) 3 [Cr(NCS) 6 ], placed in another airtight container and heated to 310°C, stirred at a constant temperature for 160min at this temperature to obtain the aromatic complex component-2;

[0069] c. Add aromatic hydrocarbon complexing component-2 to the above-mentioned intermediate-2, make the temperature 375°C, fill with nitrogen to keep the pressure at 3MPa, and react at constant t...

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Abstract

The invention discloses warm-mixed flame retardant asphalt and a preparation method thereof. The warm-mixed flame retardant asphalt is prepared from a warm mixing agent, matrix asphalt and a flame retardant. A preparation method of the warm mixing agent comprises the following steps: firstly, enabling high molecular alkane to react with a halogen element in presence of a first catalyst to obtain an intermediate; evenly mixing aromatic hydrocarbon oil with a complex to obtain an aromatic hydrocarbon complex component; then, mixing the aromatic hydrocarbon complex component with the intermediatefor carrying out a reaction to obtain the warm mixing agent. The warm-mixed flame retardant asphalt is not only good in flame-retardant effect and low in use temperature, but also can improve the heat stability and heat aging resistance of the asphalt, so that the generation amount of harmful gases is obviously reduced during asphalt construction.

Description

technical field [0001] The invention relates to a warm-mix flame-retardant asphalt and a preparation method thereof, belonging to the fields of petroleum industry and basic material chemistry. Background technique [0002] With the continuous increase of asphalt road mileage, the number of road tunnels is also increasing, and the length varies from tens of meters to several kilometers or tens of kilometers. During the process of paving asphalt pavement in the tunnel, due to the poor ventilation in the tunnel, the asphalt smoke generated is not easy to spread, which affects the physical and mental health of construction workers. For this reason, some people add flame retardants or smoke suppressants to asphalt to reduce the generation of asphalt smoke and reduce the harm to construction workers, but the results are not ideal. The study found that during the use of asphalt, the amount of asphalt fume generated is closely related to the use temperature of asphalt. With the inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08K3/22C08K3/26
CPCC08L95/00C08L2201/02C08L2201/08C08L2555/24C08L2555/50C08L91/00C08K2003/2206C08K2003/2224C08K2003/265C08K2003/2227Y02A30/30
Inventor 陈保莲徐青柏陈杰范思远张静宋乐春宁爱民李志军程国香
Owner CHINA PETROLEUM & CHEM CORP
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