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Modified imidazoline quaternary ammonium salt type asphalt warm mixing agent and preparation method thereof

The technology of imidazoline quaternary ammonium salt and imidazoline is applied in the field of preparation of road asphalt additives, which can solve the problems of poor universality, high price of warm-mixing agents, few types, etc., and achieves simple and easy-to-obtain cost and remarkable cooling effect. , the effect of adding less amount

Pending Publication Date: 2022-05-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of warm mix agent is expensive, there are relatively few types, and the universality is poor.

Method used

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  • Modified imidazoline quaternary ammonium salt type asphalt warm mixing agent and preparation method thereof
  • Modified imidazoline quaternary ammonium salt type asphalt warm mixing agent and preparation method thereof
  • Modified imidazoline quaternary ammonium salt type asphalt warm mixing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Add tall oil and diethylenetriamine with a molar ratio of 1:1 into the reactor, and add a certain amount of water-carrying agent toluene, accounting for 20% of the total mass. Stir and heat up to reflux, amidation reaction occurs at the reflux temperature, the reaction temperature is 150°C, and the reaction takes 4 hours. Evaporate the xylene, evacuate to a vacuum degree of 0.095MPa and raise the temperature to 240°C for cyclization reaction for 5h to obtain an imidazoline intermediate. Prepare a 50% ethanol solution with methyl acrylate in a molar ratio of 1:1.2 to the imidazoline intermediate, slowly add it dropwise to the imidazoline, and react for 12 hours under stirring at 40°C. The methyl acrylate of reaction, obtains product, is warm mixing agent product of the present invention.

Embodiment 2

[0037] Add tall oil and diethylenetriamine with a molar ratio of 1:1.2 into the reactor, and add a certain amount of water-carrying agent xylene, accounting for 30% of the total mass. Stir and heat up to reflux, amidation reaction occurs at the reflux temperature, the reaction temperature is 140°C, and the reaction takes 4 hours. Evaporate the xylene, evacuate to a vacuum degree of 0.095 MPa and raise the temperature to 240°C for cyclization reaction for 4 hours to obtain an imidazoline intermediate. Prepare a 50% ethanol solution with methyl acrylate in a molar ratio of 1:1.2 to the imidazoline intermediate, slowly add it dropwise to the imidazoline, and react for 12 hours under stirring at 40°C. The methyl acrylate of reaction, obtains product, is warm mixing agent product of the present invention.

Embodiment 3

[0039] Add tall oil and diethylenetriamine with a molar ratio of 1:1.4 into the reactor, and add a certain amount of water-carrying agent toluene, accounting for 40% of the total mass. Stir and heat up to reflux, amidation reaction occurs at the reflux temperature, the reaction temperature is 150°C, and the reaction takes 4 hours. Evaporate the xylene, evacuate to a vacuum degree of 0.095 MPa and raise the temperature to 240°C for cyclization reaction for 4 hours to obtain an imidazoline intermediate. Prepare a 50% ethanol solution with methyl acrylate in a molar ratio of 1:1.2 to the imidazoline intermediate, slowly add it dropwise to the imidazoline, and react for 12 hours under stirring at 40°C. The methyl acrylate of reaction, obtains product, is warm mixing agent product of the present invention.

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Abstract

The preparation method comprises the following steps: weighing the following components according to a molar ratio: tall oil and organic polyamine in a molar ratio of 1: (1-2) into a reactor, adding a water carrying agent which accounts for 20-40% of the total mass, stirring, heating and refluxing, and carrying out amidation reaction at the refluxing temperature at the reaction temperature of 120-160 DEG C for 2-10 hours; the water carrying agent is evaporated out, the vacuumizing degree is 0.09-0.1 MPa, the temperature is increased to 230-250 DEG C, a cyclization reaction is carried out for 1-10 h, and an imidazoline intermediate is prepared; and preparing an ethanol solution with the mass fraction of 50% from a quaternization reagent with the molar ratio of 1: (1-1.5) to the imidazoline intermediate, slowly dropwise adding the ethanol solution into the imidazoline intermediate, reacting for 4-24 hours under the stirring condition of 30-60 DEG C, and distilling off ethanol and the unreacted quaternization reagent under reduced pressure to obtain the asphalt warm mixing agent. The asphalt warm mixing agent disclosed by the invention does not contain water, does not need a catalyst in a reaction process, can be added through an internal doping method and an external doping method, has a low addition amount, and can remarkably reduce the mixing and compacting temperature of an asphalt mixture by 30-50 DEG C.

Description

technical field [0001] The invention relates to a preparation method of an asphalt additive for roads, in particular to a modified imidazoline quaternary ammonium salt type asphalt warm mix agent and a preparation method thereof. Background technique [0002] With the rapid development of expressways, asphalt pavement is widely used in the construction of high-grade highways because of its good driving comfort, low noise and rapid open traffic. [0003] However, hot mix asphalt mixture technology is widely used during the construction of asphalt pavement in my country. This technology generally has major problems such as high energy consumption and high pollution, which will not only cause damage to the surrounding environment, but also affect the health of construction workers. In the process of paving and compaction, a high temperature of about 150°C must be maintained. According to statistics, the production of one ton of hot mix asphalt mixture will release 2.7mg / m 3 CO...

Claims

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Application Information

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IPC IPC(8): C07D233/26C08K5/3445C08L95/00
CPCC07D233/26C08K5/3445C08L95/00Y02A30/30
Inventor 李剑新时敬涛王体宏李纯袁野
Owner PETROCHINA CO LTD
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