Method for preparing amphoteric betaine asphalt emulsifier

A technology of asphalt emulsifier and betaine, which is applied in the field of preparation of amphoteric betaine type asphalt emulsifier, can solve the problems of high temperature reaction, cumbersome preparation steps and high cost, and achieve good storage stability, simple process and low production cost Effect

Inactive Publication Date: 2014-08-13
SHANDONG UNIV
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  • Abstract
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The disadvantage of this method is that the preparation steps are...

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  • Method for preparing amphoteric betaine asphalt emulsifier

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Embodiment 1

[0021] (1) Preparation of amphoteric betaine type asphalt emulsifier:

[0022] 1) Add 284.5g cocoyl propyl dimethyl tertiary amine, 253g absolute ethanol in the reactor, stir and dissolve. Then 98.0 g of epichlorohydrin was added dropwise, and the mixture was stirred and reacted at 50° C. for 5 hours. The synthesized product was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 3292cm -1 Absorption peak for amide N-H asymmetric stretching vibration; 3015cm -1 It is the C-H stretching vibration of epoxy group; 2800~3100cm -1 At the C-H stretching vibration absorption peak: 2920cm -1 It is the asymmetric stretching vibration of methylene, 2853cm -1 It is the symmetric stretching vibration of methylene; 1645cm -1 and 1549cm -1 The characteristic absorption peak of secondary amides is at 1645cm -1 The strong absorption peak is C=O stretching vibration absorption peak; 1466cm -1 The absorption peak is the C-N stretching vibra...

Embodiment 2

[0030] (1) Preparation of amphoteric betaine type asphalt emulsifier:

[0031] 1) Add 284.5g cocoyl propyl dimethyl tertiary amine, 253g isopropanol in the reactor, stirring and dissolving. Then 101.7 g of epichlorohydrin was added dropwise, and the mixture was stirred and reacted at 40°C for 6 hours.

[0032]2) Continue to add 144.5 g of 33% dimethylamine aqueous solution dropwise to the above reaction solution, and stir and react at 80° C. for 2 hours to obtain an asphalt emulsifier.

[0033] 3) Dissolve 42.4g of sodium hydroxide in 80.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 100.2g of chloroacetic acid in 200.0g of water to obtain an aqueous solution of chloroacetic acid; add the aqueous solution of sodium hydroxide dropwise to an aqueous solution of chloroacetic acid to obtain an aqueous solution of sodium chloroacetate . The prepared sodium chloroacetate aqueous solution was added dropwise to the product synthesized in step 2) above, and s...

Embodiment 3

[0039] (1) Preparation of amphoteric betaine type asphalt emulsifier:

[0040] 1) Add 284.5g cocoyl propyl dimethyl tertiary amine, 253g methyl alcohol in reactor, stir and dissolve. Then 101.7 g of epichlorohydrin was added dropwise, and the mixture was stirred and reacted at 60° C. for 2 hours.

[0041] 2) Continue to add 144.5 g of 33% dimethylamine aqueous solution dropwise to the above reaction solution, and stir and react at 60° C. for 7 hours to obtain an asphalt emulsifier.

[0042] 3) Dissolve 42.4g of sodium hydroxide in 80.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 100.2g of chloroacetic acid in 200.0g of water to obtain an aqueous solution of chloroacetic acid; add the aqueous solution of sodium hydroxide dropwise to an aqueous solution of chloroacetic acid to obtain an aqueous solution of sodium chloroacetate . The prepared sodium chloroacetate aqueous solution was added dropwise to the product synthesized in step 2) above, and stirr...

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Abstract

The invention discloses a method for preparing an amphoteric betaine asphalt emulsifier. The method comprises the following steps: by adopting coconut oil acyl propyl dimethyl tertiary amine as a raw material, reacting with epoxy chloropropane to obtain an intermediate in an alcohols solvent; and continuing to react with a dimethylamine aqueous solution and sodium chloroacetate, so as to obtain the amphoteric betaine asphalt emulsifier. The asphalt emulsifier is easily available in synthetic raw material, low in production cost, simple in process, and free of high-temperature reaction. The prepared emulsified asphalt is even, fine and smooth, good in storage stability, and applicable to spreading of penetrated oil or a tack coat for a high-way, and has the characteristics of a medium breaking asphalt emulsifier; each performance of the prepared emulsified asphalt can meet the standard of cationic emulsified asphalt formulated by the China's Ministry of transportation.

Description

technical field [0001] The invention relates to a preparation method of an amphoteric betaine type asphalt emulsifier, belonging to the technical field of fine chemicals. Background technique [0002] Surfactants are classified into anionic, cationic, zwitterionic and nonionic. The asphalt emulsifiers used in the initial stage of research are mainly anionic emulsifiers, mainly long-chain sulfonates and carboxylates. Finally, it is replaced by cationic emulsifier with better emulsifying performance. Cationic asphalt emulsifiers mainly include organic amines, quaternary ammonium salts, imidazolines, 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. [0003] US Patent USP4338136 to C 12-18 The asphalt emulsifier was prepared by reacting long carbon chain fatty acid with diethylenetriamine under certain conditions. The disadvantage...

Claims

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Application Information

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IPC IPC(8): C07C233/36C07C231/12C08J3/03C08L95/00
Inventor 施来顺陶翔孙梅杰谢朝仁
Owner SHANDONG UNIV
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