Dicationic tertiary amide asphalt emulsifier and preparation method thereof

A technology of asphalt emulsifier and tertiary amide type, which is applied in the field of dicationic tertiary amide type asphalt emulsifier and its preparation, can solve the problems of high cost of emulsifier raw materials, increased energy consumption, and high requirements for production experimental equipment, and achieves good aggregates. The effect of adhesion, improved hydrolytic stability and excellent performance indicators

Inactive Publication Date: 2017-08-18
SHANDONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The general disadvantages of the above cationic asphalt emulsifiers and their preparation methods are: the cost of raw materials for the preparation of emulsifiers is high, the sources are limited, high temperature reactions are required during preparation, and the requirements for production and experimental equipment are relatively high
However, in subsequent further studies, it was found that there are still some areas for improvement in the preparation of asphalt emulsifiers using acrylamide as a raw material, such as: acrylamide is a solid raw material, which is inconvenient to add and mix with other raw materials; The reaction is an endothermic reaction, so it is necessary to increase the introduction of external heat during the preparation of asphalt emulsifier, which increases energy consumption

Method used

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  • Dicationic tertiary amide asphalt emulsifier and preparation method thereof
  • Dicationic tertiary amide asphalt emulsifier and preparation method thereof
  • Dicationic tertiary amide asphalt emulsifier and preparation method thereof

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preparation example Construction

[0047] In one embodiment of the present invention, the preparation method of above-mentioned biscation tertiary amide type asphalt emulsifier is provided, comprises the steps:

[0048] (1) Add octadecylamine into the reaction vessel, add alcohol solvent, heat and stir to dissolve, then add N,N-dimethylacrylamide in batches, after the addition, stir and react at 60-80°C for 2-4h , to obtain reaction intermediate I;

[0049] (2) Add low carbon number tertiary amine in another reactor, add industrial hydrochloric acid in batches, after adding industrial hydrochloric acid, then add epichlorohydrin in batches, after adding epichlorohydrin, at 47-55 ℃ Stirring and reacting for 2-3h to obtain reaction intermediate II, wherein the low carbon number tertiary amine is trimethylamine aqueous solution, triethylamine or triethanolamine aqueous solution;

[0050] (3) Add the reaction intermediate II to the reaction intermediate I in batches, and react at 60-80° C. for 2-4 hours to obtain a...

Embodiment 1

[0058] (1) Preparation of double cationic tertiary amide type asphalt emulsifier:

[0059] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then, 203.2 g of N,N-dimethylacrylamide was added gradually, and stirred at 70° C. for 3 h to obtain reaction intermediate I.

[0060] The above reaction intermediate I synthesized was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 2910cm -1 It is the asymmetric stretching vibration absorption peak of methylene, 2840cm -1 Closed peak for the symmetrical stretching vibration of methylene, 1650cm -1 and 1625cm -1 It is the C=O stretching vibration absorption peak in the amide group, 1460cm -1 is the asymmetric bending vibration of methylene, 1390cm -1 is the asymmetric bending vibration of the methyl group, 1263cm -1 and 1153cm -1 C-N stretching vibration absorption peak, 777cm -1 and 719cm -1 It is the in-plane rocking vibration absorption ...

Embodiment 2

[0071] (1) Preparation of double cationic tertiary amide type asphalt emulsifier:

[0072] 1) Add 269.5g octadecylamine, 260g isopropanol in the reactor, heat and stir to dissolve. Then, 203.2 g of N,N-dimethylacrylamide was added gradually, and stirred at 70° C. for 3 h to obtain reaction intermediate I.

[0073] 2) Add 109.1g triethylamine to another reactor, gradually add 131.2g 30% (mass fraction) industrial hydrochloric acid, then gradually add 97.1g epichlorohydrin, stir and react at 47°C for 3h to obtain reaction intermediate II.

[0074] 3) The prepared reaction intermediate II was added dropwise to the reaction intermediate I synthesized in the above step 1), and the reaction was stirred at 65° C. for 3 h. The dicationic tertiary amide type asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.

[0075] The synthesized product was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 3410cm ...

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Abstract

The invention discloses a dicationic tertiary amide asphalt emulsifier. A molecular structure is as shown in the specification, wherein R=methyl(-CH3), ethyl(-C2H5), ethoxy(-C2H4OH). The dicationic tertiary amide asphalt emulsifier is prepared from the following raw materials of octadecylamine, an alcohol solvent, N,N-dimethylacrylamide, low-carbon tertiary amine, industrial hydrochloric acid and epoxy chloropropane at the molar ratio of 1mol:(4.00-9.00)mol:(2.00-2.10)mol:(1.02-1.10)mol:(1.02-1.10)mol:(1.02-1.08)mol. The N,N-dimethylacrylamide is taken as a reaction raw material of the asphalt emulsifier and is a liquid raw material, so that charging and mixing with other raw materials are facilitated; and the reaction process is exothermic reaction, so that the reaction energy consumption is reduced. The asphalt emulsifier is low in production cost, simple in process and free of high-temperature reaction.

Description

technical field [0001] The invention relates to a dicationic tertiary amide type asphalt emulsifier and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] Emulsified asphalt, especially cationic emulsified asphalt, is widely used in road construction and road maintenance due to its energy-saving and environmental protection, improving construction conditions, and effectively reducing excessive aging of asphalt. [0003] The most critical factor affecting the road performance of emulsified asphalt is the asphalt emulsifier. At present, the main varieties of cationic asphalt emulsifiers at home and abroad include organic amines, quaternary ammonium salts, imidazolines, amides, etc., among which quaternary ammonium salt emulsifiers are The most widely used. With the application of cationic emulsified asphalt, the varieties of asphalt emulsifiers are gradually enriched. [0004] US Patent USP4338136 to C 12-18 The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/12C07C237/06C08J3/03C08L95/00
CPCC07C231/12C07C237/06C07D303/36C08J3/03C08J2395/00C08L95/005
Inventor 施来顺于小梦马存飞
Owner SHANDONG UNIV
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