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Dication asphalt emulsifier and preparation method thereof

An asphalt emulsifier and dication technology, which is applied in the field of dication asphalt emulsifier and its preparation, can solve the problems of high cost, high temperature reaction, source limitation, etc., and achieve enhanced charge strength, good storage stability and low production cost. low effect

Inactive Publication Date: 2014-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation steps are cumbersome, the cost is high, and high temperature reaction is required
[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

Method used

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  • Dication asphalt emulsifier and preparation method thereof
  • Dication asphalt emulsifier and preparation method thereof
  • Dication asphalt emulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of double cationic asphalt emulsifier:

[0032] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 90.3 g of methyl acrylate was added dropwise, and stirred at 70° C. for 4 h to obtain a reaction intermediate.

[0033] The obtained reaction intermediate was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 3275cm -1 N-H stretching vibration absorption peak, 2917cm -1 and 2854cm -1 The asymmetric stretching vibration and symmetric stretching vibration absorption peaks of methylene respectively, 1735cm -1 It is the ester group C=O stretching vibration absorption peak, 1569cm -1 It is the bending vibration absorption peak of N-H, 1470cm -1 It is the methylene scissor vibration absorption peak, 1376cm -1 It is the methyl symmetrical bending vibration absorption peak, 1207cm -1 C-N stretching vibration absorption peak, 1125c...

Embodiment 2

[0044] (1) Preparation of double cationic asphalt emulsifier:

[0045] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 175.5 g of methyl acrylate was added dropwise, and stirred at 75° C. for 3 h to obtain a reaction intermediate.

[0046] 2) Dissolve 83.2g of sodium hydroxide in 160.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 196.6g of chloroacetic acid in 400.0g 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 1) above, and stirred at 75° C. for 3 h. The dicationic asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.

[0047] The synthesized product was separated a...

Embodiment 3

[0056] (1) Preparation of double cationic asphalt emulsifier:

[0057] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 261.6 g of methyl acrylate was added dropwise, and stirred at 70° C. for 4 h to obtain a reaction intermediate.

[0058] 2) Dissolve 83.2g of sodium hydroxide in 160.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 196.6g of chloroacetic acid in 400.0g 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 1) above, and stirred at 60° C. for 7 h. The dicationic asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.

[0059] The synthesized product was separated a...

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Abstract

The invention discloses a dication asphalt emulsifier. The molecular structure of the dication asphalt emulsifier is shown in the description, wherein when x is equal to 1, y is equal to 1 and i is equal to 0; when x is equal to 2, y is equal to 0, z is equal to 1 or 0, and i plus z is equal to 1. The dication asphalt emulsifier is prepared from the following raw material in molar ratio: 1 mol of N-Hydrogenated tallow-1, 3-diaminopropane, 6.00-13.00 mol of alcohols solvent, 1.02-3.05 mol of methyl acrylate, and 2.02-2.10 mol of sodium chloroacetate. The alcohols solvent adopts ethyl alcohol, methyl alcohol or isopropyl alcohol. The synthetic raw material of the dication asphalt emulsifier is easy to get, the production cost is low, the technology is simple, and high-temperature reaction is not required. Different types of asphalt can be emulsified, the prepared asphalt emulsifier is exquisite and uniform, the storage stability is good, dication emulsified asphalt can be prepared, and the dication asphalt emulsifier is applied to spreading of road penetrated oil layers or bonding oil as well as slurry surfacing and micro-surfacing parts, and has the characteristics of a medium breaking asphalt emulsifier and a slow breaking asphalt emulsifier.

Description

technical field [0001] The invention relates to a dicationic 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 pavement maintenance because of its energy-saving and environmental protection, can improve construction conditions, and can effectively reduce excessive aging of asphalt and many other excellent application characteristics. [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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/16C07C227/18C08J3/03C08L95/00
Inventor 施来顺孙梅杰任雨晴陈晶晶孙久洲谭江华徐麒麟王帅
Owner SHANDONG UNIV
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