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Mixed fatty group di(benzimidazoline-ammonium-salt) as well as preparation method and application thereof

A technology of imidazoline quaternary ammonium salt and benzimidazoline, which is applied in the field of mixed aliphatic bismuth and its preparation, can solve problems such as poor corrosion inhibition effect, achieve the effects of protecting the environment, increasing hydrophobicity, and reducing production costs

Active Publication Date: 2016-11-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a kind of mixed fat-based bis(benzimidazolium quaternary ammonium salt) and its preparation method and application, which are used to solve the technical defect of poor corrosion inhibition effect of corrosion inhibitors in the prior art

Method used

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  • Mixed fatty group di(benzimidazoline-ammonium-salt) as well as preparation method and application thereof
  • Mixed fatty group di(benzimidazoline-ammonium-salt) as well as preparation method and application thereof
  • Mixed fatty group di(benzimidazoline-ammonium-salt) as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example is a specific example of preparing 1,4-bis(2-mixed aliphatic-1-benzoimidazoline phenyl quaternary ammonium)-2-butene corrosion inhibitor.

[0023] The chemical reaction formula of the reaction principle of the present embodiment is:

[0024]

[0025] Hydrolyze waste oil to obtain mixed fatty acids, set aside.

[0026] In a three-necked flask equipped with a water separator, a thermometer, a condenser, and a stirring device, add 27.2g of mixed fatty acids, 16.6g of N-phenyl-o-phenylenediamine, and 60ml of xylene, and pass into nitrogen protection. The by-product water is separated from the system by a device, slowly heated to 140°C, and reacted for 3.5-4.0 hours. When the amount of collected water is close to the theoretical water yield, then raise the temperature to 170-180°C to distill the solvent, and heat to reflux for 4-5 hours. After continuing the cyclization reaction at 210-220°C for 3 hours, distill under reduced pressure of 20-25 mmHg until no...

Embodiment 2

[0029] This example is a specific example of preparing 1,4-bis(2-mixed aliphatic-1-benzimidazolinylmethylmethylenequaternary ammonium)benzene corrosion inhibitor.

[0030] The chemical reaction formula of the reaction principle of the present embodiment is:

[0031]

[0032] Hydrolyze waste oil to obtain mixed fatty acids, set aside.

[0033] In a three-necked flask equipped with a water separator, a thermometer, a condenser and a stirring device, add 27.2g of mixed fatty acids, 17.5g of N-methyl-o-phenylenediamine and 80ml of xylene, pass into nitrogen protection, and continuously use water during the reaction The by-product water is separated from the system by a device, slowly heated to 140°C, and reacted for 3.5-4.0 hours. When the amount of collected water is close to the theoretical water yield, then raise the temperature to 170-180°C to distill the solvent, and heat to reflux for 4-5 hours. After continuing the cyclization reaction at 210-220°C for 3 hours, distill...

Embodiment 3

[0036] This example is a specific example of preparing 1,4-bis(2-mixed aliphatic-1-benzoimidazolinylmethyl quaternary ammonium)-2-butene corrosion inhibitor.

[0037] The chemical reaction formula of the reaction principle of the present embodiment is:

[0038]

[0039] Hydrolyze waste oil to obtain mixed fatty acids, set aside.

[0040] In a three-necked flask equipped with a water separator, a thermometer, a condenser, and a stirring device, add 27.2g of mixed fatty acids, 18.5g of N-methyl-o-phenylenediamine, and 40ml of xylene, and pass into nitrogen protection. The by-product water is separated from the system by a device, slowly heated to 140°C, and reacted for 3.5-4.0 hours. When the amount of collected water is close to the theoretical water yield, then raise the temperature to 170-180°C to distill the solvent, and heat to reflux for 4-5 hours. After continuing the cyclization reaction at 210-220°C for 3 hours, distill under reduced pressure of 20-25 mmHg until no...

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Abstract

The invention belongs to the field of fine organic chemical engineering, and in particular relates to a mixed fatty group di(benzimidazoline-ammonium-salt) as well as a preparation method and application thereof. The invention provides a structure of the mixed fatty group di(benzimidazoline-ammonium-salt), and further provides a preparation method and application of the mixed fatty group di(benzimidazoline-ammonium-salt). After a mixed fatty group and a quaternary ammonium group are introduced into benzimidazoline molecules, the hydrophobicity of a protection membrane can be improved, the metal corrosion velocity can be reduced, and the water solubility of a corrosion inhibitor can be improved. Results of experimental determination show that the corrosion inhibition effect of the corrosion inhibitor provided by the technical scheme of the invention is remarkably superior to that of a conventional corrosion inhibitor. The technical defects that in the prior art a corrosion inhibitor is poor in corrosion inhibition effect and poor in water solubility are solved. In addition, swill-cooked dirty oil is used as a raw material of the mixed fatty group di(benzimidazoline-ammonium-salt), so that the production cost is lowered, and furthermore the environment can be protected.

Description

technical field [0001] The invention belongs to the field of fine organic chemical industry, and in particular relates to a mixed aliphatic-based bis(benzimidazolium quaternary ammonium salt) and its preparation method and application. Background technique [0002] In the process of oil and gas well mining and pickling of industrial thermal equipment, in order to prevent acid liquid from corroding oil pipes, casings and boilers and other equipment, adding corrosion inhibitors to acid liquid is an essential anti-corrosion measure. In recent years, imidazoline Corrosion inhibitors are widely used in oilfield pipeline anticorrosion and pickling industry. [0003] At present, the synthesis of benzimidazoline is mainly prepared from organic carboxylic acid and o-phenylenediamine or substituted o-phenylenediamine through amidation and cyclodehydration by step heating technology. The specific preparation method of the prior art is: using C7-C20 fatty acids, o-phenylenediamine or s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D235/08C23G1/26
CPCC07D235/08C23G1/26
Inventor 袁斌胡薇吕松
Owner GUANGDONG UNIV OF TECH
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