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Imidazoline amphoteric surfactant and preparation method thereof

A technology of surfactant and imidazoline, which is applied in the field of imidazoline amphoteric surfactant and preparation, can solve the problems of environmental friendliness and low toxicity, great harm to production personnel, unfriendly environment, etc., and achieve superior corrosion inhibition performance, Strong adsorption and low cost effect

Active Publication Date: 2016-05-11
陕西长海油田助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the above-mentioned experts have carried out different degrees of research on corrosion inhibitors, mostly using long-carbon chain organic acids as reactants, and mostly using benzyl chloride or dimethyl sulfate as quaternizing reagents during quaternization. The two reagents are highly toxic, volatile, harmful to production personnel, and unfriendly to the environment. Therefore, the above research does not solve the problems of environmental friendliness and low toxicity

Method used

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  • Imidazoline amphoteric surfactant and preparation method thereof
  • Imidazoline amphoteric surfactant and preparation method thereof
  • Imidazoline amphoteric surfactant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] The preparation method of imidazoline amphoteric surfactant comprises the following steps:

[0039] 1) Cinnamic acid, diethylenetriamine, xylene, Al 2 o 3 Add a reflux condenser, stirrer, 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. An imidazoline intermediate is obtained.

[0040] Wherein, the molar ratio of cinnamic acid and diethylenetriamine is 1:1.1, and the amount of xylene added is 20% of the total mass of cinnamic acid and diethylenetriamine; Al 2 o 3 The addition amount is 0.1% of the cinnamic acid quality.

[0041] 2) Add thiosemicarbazide and n-octanol to the imidazoline intermediate, react at 140°C for 2 hours, di...

Embodiment 2

[0046] The preparation method of imidazoline amphoteric surfactant comprises the following steps:

[0047] 1) Add cinnamic acid, diethylenetriamine, xylene, and magnesium chips to the equipment equipped 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 220°C, and the dehydration reaction was carried out for 5 hours. Imidazoline intermediate.

[0048] Among them, the molar ratio of cinnamic acid to diethylenetriamine is 1:1.2, the amount of xylene added is 25% of the total mass of cinnamic acid and diethylenetriamine; the amount of added magnesium chips is 0.2% of the mass of cinnamic acid.

[0049] 2) Add thiosemicarbazide and n-octanol to the imidazoline intermediate, ...

Embodiment 3

[0054] The preparation method of imidazoline amphoteric surfactant comprises the following steps:

[0055] 1) Cinnamic acid, diethylenetriamine, xylene, Al 2 o 3 Add a reflux condenser, stirrer, thermometer, water separator and N 2 In the four-necked flask of the protective device, dehydration reaction was carried out at 160°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 230°C, and the dehydration reaction was carried out for 6 hours. Imidazoline intermediate.

[0056] Wherein, the molar ratio of cinnamic acid and diethylenetriamine is 1:1.3, and the amount of xylene added is 30% of the total mass of cinnamic acid and diethylenetriamine; Al 2 o 3 The addition amount is 0.3% of cinnamic acid quality.

[0057] 2) Add thiosemicarbazide and n-octanol to the imidazoline intermediate, react at 160°C for 4 hours, distill under reduced...

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Abstract

The invention provides an imidazoline amphoteric surfactant and a preparation method thereof. The method comprises the steps: stirring and mixing cinnamic acid and diethylenetriamine in the presence of a water carrying agent and a catalyst, and carrying out amidation reaction and cyclization reaction dehydrating, so as to obtain an imidazoline intermediate; introducing a thiourea group into the imidazoline intermediate, and carrying out quaternization by using sodium chloroacetate, thereby obtaining the imidazoline amphoteric surfactant. According to the imidazoline amphoteric surfactant and the preparation method thereof, by taking sodium chloroacetate as a quaternization reagent, the reaction is easy to carry out, the product quality is good, and the water solubility of the product is improved. The imidazoline amphoteric surfactant provided by the invention is easy to synthesize and has good stability, and the raw materials are cheap and readily available.

Description

technical field [0001] The invention relates to a quaternary ammonium salt corrosion inhibitor, in particular to an imidazoline amphoteric surfactant and a preparation method. Background technique [0002] The widely used imidazoline derivatives in the field of water treatment corrosion inhibitors are mainly carboxylate type and sulfate type, etc., which are mainly used as oil field corrosion inhibitors, fungicides, pickling corrosion inhibitors; and imidazoline quaternary ammonium salts The synthesis process is simple, the product has good water solubility and high surface activity. At present, there are many reports on the synthesis of imidazoline derivatives at home and abroad, most of which use organic acids with long-chain alkyl groups as the main body of the reaction. However, due to the long-chain hydrophobic groups of this organic acid, water solubility is generally poor, and its quaternary During ammonization, benzyl chloride or dimethyl sulfate are often used as q...

Claims

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Application Information

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IPC IPC(8): B01F17/32B01F17/28C07D233/18C09K23/32C09K23/28
CPCC07D233/18C09K23/00
Inventor 郭睿程敏杨江月甄建斌王超李欢乐刘爱玉李晓芳
Owner 陕西长海油田助剂有限公司
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