Preparation method of cationic asphalt emulsifier with corrosion inhibition function

A technology of asphalt emulsifier and cation, which is applied in the field of preparation of cationic asphalt emulsifier with corrosion inhibition function, can solve the problems that do not cause domestic and foreign researchers, equipment corrosion, emulsified asphalt production unit safety hazards, etc., and achieve simple preparation method, Good corrosion inhibition performance, high surface activity effect

Inactive Publication Date: 2018-03-20
SHAANXI HUANKE BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical core of cationic asphalt is cationic asphalt emulsifier, and currently widely used cationic asphalt emulsifier needs to adjust the pH value to 2~5 when preparing emulsifier aqueous solution, and the acid adjustment process will prepare storage tank and colloid for emulsifier aqueous solution Grinding head, conveying pump and pipeline, emulsified asphalt storage tank, paver and other equipment cause corrosion, which brings safety hazards to emulsified asphalt production units
However, this hidden danger has not attracted enough attention from domestic and foreign researchers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of cationic asphalt emulsifier with corrosion inhibiting function comprises the following steps:

[0020] (1) According to the molar ratio of 1:1:1, mix lauric acid, tetraethylenepentamine, and xylene, stir and react at 160°C for 3h, then distill at 180°C for 30min, and then distill at 0.092MPa, 230 Under the condition of ℃, react for 3.5h to obtain long-chain alkyl imidazoline;

[0021] (2) According to the molar ratio of 1:2.2, mix dibutylamine and epichlorohydrin, use absolute ethanol as solvent, and add hydrochloric acid solution with a concentration of 0.1mol / L to the reaction system until the pH is 5 , stirred and reacted at 35°C for 10 h, after the reaction was completed, rotary evaporated at 0.095 MPa and 40°C for 30 min, and then vacuum-dried at 0.09 MPa and 60°C for 8-10 h to obtain N-butyl-N , N-two (3-chloro-2-hydroxypropyl) butane-1 ammonium salt;

[0022] (3) According to the molar ratio of 1:2.1, the N-butyl-N,N-bis(3-chloro-2-hyd...

Embodiment 2

[0024] The preparation method of cationic asphalt emulsifier with corrosion inhibiting function comprises the following steps:

[0025] (1) According to the molar ratio of 1:1:1, mix lauric acid, tetraethylenepentamine, and xylene, stir and react at 180°C for 4h, then distill at 1200°C for 50min, then distill at 0.092MPa, 250 Under the condition of ℃, react for 4h to obtain long-chain alkyl imidazoline;

[0026] (2) According to the molar ratio of 1:2.2, mix dibutylamine and epichlorohydrin, use absolute ethanol as the solvent, and add hydrochloric acid solution with a concentration of 0.1mol / L to the reaction system until the pH is 6 , stirred and reacted at 35°C for 10 h, after the reaction was completed, rotary evaporated at 0.095 MPa and 60°C for 50 min, and then vacuum-dried at 0.1 MPa and 70°C for 10 h to obtain N-butyl-N, N-di(3-chloro-2-hydroxypropyl)butane-1 ammonium salt;

[0027] (3) According to the molar ratio of 1:2.1, the N-butyl-N,N-bis(3-chloro-2-hydroxyprop...

Embodiment 3

[0029] The preparation method of cationic asphalt emulsifier with corrosion inhibiting function comprises the following steps:

[0030] (1) According to the molar ratio of 1:1:1, mix lauric acid, tetraethylenepentamine, and xylene, stir and react at 170°C for 3.5h, then distill at 180-200°C for 40min, and then distill at 0.092 Reaction under the conditions of MPa and 230-250°C for 3.5-4h to obtain long-chain alkyl imidazoline;

[0031] (2) According to the molar ratio of 1:2.2, mix dibutylamine and epichlorohydrin, use absolute ethanol as solvent, and add hydrochloric acid solution with a concentration of 0.1mol / L to the reaction system until the pH is 5 -6, stirred and reacted at 35°C for 10 h, after the reaction was completed, rotary evaporated at 0.095 MPa and 50°C for 30-50 min, and then vacuum-dried at 0.1 MPa and 65°C for 9 h to obtain N-butyl Ammonium-N,N-di(3-chloro-2-hydroxypropyl)butane-1 ammonium salt;

[0032] (3) According to the molar ratio of 1:2.1, the N-buty...

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PUM

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Abstract

The invention discloses a preparation method of a cationic asphalt emulsifier with corrosion inhibiting function, comprising the following steps: (1) mixing lauric acid, tetraethylenepentamine and xylene, stirring and reacting, distilling, and heating at 0.092MPa, 230-250°C Under the conditions of reaction for 3.5-4h, long-chain alkyl imidazolines are obtained; (2) Dibutylamine and epichlorohydrin are mixed, and absolute ethanol is used as a solvent, and hydrochloric acid solution is added dropwise until the pH is 5-6, and the reaction is completed Finally, rotary evaporation, and then dry in vacuo to obtain N-butyl-N, N-two (3-chloro-2-hydroxypropyl) butane-1 ammonium salt; (3) N-butyl-N, N-bis(3-chloro-2-hydroxypropyl) butane-1 ammonium salt is mixed with long-chain alkyl imidazoline, and isopropanol is added as a solvent. After the reaction is completed, vacuum distillation is completed. The preparation method of the invention is simple, and the synthetic product has good corrosion inhibition performance under different pH value environments.

Description

technical field [0001] The invention belongs to the technical field of asphalt emulsifiers, and in particular relates to a preparation method of a cationic asphalt emulsifier with corrosion inhibiting function. Background technique [0002] Emulsified asphalt has the advantages of saving energy, prolonging the construction season and reducing environmental pollution. It is considered to be the most effective and economical means to repair road surface diseases. [0003] Cationic emulsified asphalt has become the most widely used emulsified asphalt due to its high adhesion to various mineral materials and less dosage. [0004] The technical core of cationic asphalt is cationic asphalt emulsifier, and currently widely used cationic asphalt emulsifier needs to adjust the pH value to 2~5 when preparing emulsifier aqueous solution, and the acid adjustment process will prepare storage tank and colloid for emulsifier aqueous solution The grinding head, conveying pump and pipeline,...

Claims

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Application Information

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IPC IPC(8): C07D233/24C08J3/03C08L95/00
CPCC07D233/24C08J3/03C08J2395/00
Inventor 郝青
Owner SHAANXI HUANKE BIOLOGICAL TECH CO LTD
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