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Imidazoline quaternary ammonium salt compound and preparation method therefor

A technology of imidazoline quaternary ammonium salts and compounds, which is applied in the field of imidazoline quaternary ammonium salt compounds and their preparation, can solve the problems of environmental friendliness and cost, complex preparation process of naphthenic acid, and great harm to production personnel, and achieve superiority Corrosion inhibition performance, low toxicity, low price effect

Inactive Publication Date: 2016-01-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lei Liangcai, Xiao Kai, Shen Yu, etc. (Corrosion and Protection, 2001, 22(10): 420-423) synthesized imidazoline corrosion inhibitors using naphthenic acid and diethylenetriamine as raw materials, and the preparation process of naphthenic acid It is more complicated, and naphthenic acid itself has certain risks, which will affect the follow-up tests
[0004] To sum up, the above-mentioned experts have carried out different degrees of research on corrosion inhibitors, and most of them use benzyl chloride or dimethyl sulfate as the quaternization reagent. These two reagents are highly toxic and volatile, and are very harmful to production personnel. Unfriendly to the environment, therefore, the above research does not address the issues of environmental friendliness and cost

Method used

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  • Imidazoline quaternary ammonium salt compound and preparation method therefor
  • Imidazoline quaternary ammonium salt compound and preparation method therefor
  • Imidazoline quaternary ammonium salt compound and preparation method therefor

Examples

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preparation example Construction

[0026] A kind of preparation method of imidazoline quaternary ammonium salt compound, comprises the following steps:

[0027] 1) Add lauric acid, hydroxyethylethylenediamine, water-carrying agent, catalyst and magnesium chips to the equipment equipped with reflux condenser, stirrer, thermometer, water separator and N 2 In the reactor of the protection device, the dehydration reaction is carried out at 150°C-160°C for 4-5 hours. During the reaction process, water can be seen to be carried out by the solvent. Dehydration reaction for 4-6 hours to obtain an imidazoline intermediate; recrystallize the imidazoline intermediate with acetone to obtain a purified imidazoline intermediate.

[0028] Among them, the molar ratio of lauric acid to hydroxyethylethylenediamine is 1: (1.1-1.3), the amount of water-carrying agent added is 20%-30% of the total mass of lauric acid and hydroxyethylethylenediamine, and the water-carrying agent The agent is xylene or toluene; the addition amount o...

Embodiment 1

[0034] The preparation of imidazoline quaternary ammonium salt compound comprises the following steps:

[0035] 1) Add lauric acid, hydroxyethylethylenediamine, xylene, Al 2 o 3 and magnesium scraps are added with a reflux condenser, agitator, thermometer, water separator and N 2 In the four-necked flask of the protection device, dehydration reaction was carried out at 150°C for 4 hours. During the reaction process, water was gradually taken out by the solvent, and the water output was basically stable after 4 hours of reaction. Then the temperature was raised to 210°C, and the dehydration reaction was carried out for 4 hours to obtain the imidazoline intermediate. ; After the imidazoline intermediate is distilled under reduced pressure and recrystallized from acetone, the purified imidazoline intermediate is obtained.

[0036] Wherein, the molar ratio of lauric acid and hydroxyethylethylenediamine is 1:1.1, and the amount of xylene added is 20% of the total mass of lauric a...

Embodiment 2

[0040] The preparation of imidazoline quaternary ammonium salt compound comprises the following steps:

[0041] 1) Add lauric acid, hydroxyethylethylenediamine, xylene, Al 2 o 3 and magnesium scraps are added with a reflux condenser, agitator, thermometer, water separator and N 2 In the four-neck flask of the protective device, dehydration reaction at 150°C for 4 hours, then heated up to 220°C, dehydration reaction for 5 hours, to obtain the imidazoline intermediate; after the imidazoline intermediate was distilled under reduced pressure and recrystallized from acetone, the purified imidazole was obtained Phenyl intermediates.

[0042] Wherein, the molar ratio of lauric acid and hydroxyethylethylenediamine is 1:1.2, and the amount of xylene added is 25% of the total mass of lauric acid and hydroxyethylethylenediamine; Al 2 o3 , The addition of magnesium chips is 0.2% of the quality of lauric acid.

[0043] 2) Add ethanol to the purified imidazoline intermediate, then heat ...

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Abstract

Provided are an imidazoline quaternary ammonium salt compound and a preparation method therefor. Lauric acid and hydroxyethyl ethylenediamine are employed as raw materials, a dehydration reaction is carried out, imidazoline intermediates are synthesized, and then after quaternization, an imidazoline quaternary ammonium salt compound is obtained, wherein a quaternized reagent is sulfamic acid. Sulfamic acid is employed as a quaternized reagent, thus the quaternization reaction is carried out easily, and the product water solubility is raised. The imidazoline quaternary ammonium salt employs sulfamic acid as a quaternized reagent, and sulfamic acid has low toxicity, and is cheap and easily available. An imidazoline sulfuric ester salt is obtained through the method, and the imidazoline sulfuric ester salt is an amphoteric substance. The product contains -SO3 hydrophilic groups, the water solubility is good, the inhibition efficiency is high, water solubility requirements of imidazoline products can be met, and popularization in the industrial process is worthy. The synthetic technology is simple, the production processes are environmentally friendly, and the purposes of lowering the corrosion inhibitor cost and raising the operation safety are achieved.

Description

technical field [0001] The invention relates to a corrosion inhibitor containing imidazoline quaternary ammonium salt, in particular to an imidazoline quaternary ammonium salt compound and a preparation method thereof. Background technique [0002] Imidazoline quaternary ammonium salt corrosion inhibitor is widely used in the field of water treatment corrosion inhibitors, mainly used as oilfield corrosion inhibitors, fungicides, and pickling corrosion inhibitors. At present, there are many reports on the synthesis of imidazoline quaternary ammonium salts both at home and abroad. When quaternization, benzyl chloride or dimethyl sulfate are mostly used as quaternization reagents. These two reagents are highly toxic and volatile, which is harmful to production personnel. Harmful, not friendly to the environment. Therefore, selecting low-toxicity quaternizing reagents to synthesize new water-soluble imidazoline quaternary ammonium salts can produce certain environmental benefit...

Claims

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Application Information

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IPC IPC(8): C07D233/14
CPCC07D233/14
Inventor 郭睿程敏杨江月李晓芳刘爱玉李欢乐王超甄建斌
Owner SHAANXI UNIV OF SCI & TECH
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