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Acidizing corrosion inhibitor based on dimer indolizine derivative and preparation method and application of acidizing corrosion inhibitor

A technology of acidification corrosion inhibitor and indolezine, which is applied in the field of acidification corrosion inhibitor and its preparation, can solve problems such as application limitations, and achieve the effect of small influence, fast dissolution speed and good acid solubility

Inactive Publication Date: 2018-08-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of related acidification corrosion inhibitors is also often affected by economic costs and environmental protection requirements, so that its application is limited

Method used

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  • Acidizing corrosion inhibitor based on dimer indolizine derivative and preparation method and application of acidizing corrosion inhibitor
  • Acidizing corrosion inhibitor based on dimer indolizine derivative and preparation method and application of acidizing corrosion inhibitor
  • Acidizing corrosion inhibitor based on dimer indolizine derivative and preparation method and application of acidizing corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take pyridine and benzyl chloride with a molar ratio of 1:1, use the same molar amount of water as a solvent, heat and stir at 90-100°C for 8 hours, and obtain a dark yellow transparent liquid, which is a quaternary benzylpyridine chloride. Ammonium salt solution.

[0039] After the solvent water of the above-mentioned benzylpyridinium chloride quaternary ammonium salt solution is removed by heating and evaporating, N,N dimethylformamide is added as a solvent in the system, and triethylamine in an equimolar ratio with the initial raw material is added, and the process continues at 80 Heating and stirring at -100°C for 2 hours, benzylpyridinium chloride quaternary ammonium salt undergoes an intermolecular dimerization reaction to obtain a dimer indoleazine derivative, which is a dark brown liquid, evaporates and removes the solvent under heating, and becomes a corrosion inhibitor main agent.

[0040] The acidified corrosion inhibitor product can be obtained by mixing th...

Embodiment 2

[0042] Take quinoline and benzyl chloride with a molar ratio of 1:1, use the same molar amount of water as a solvent, heat and stir under reflux at 90-100°C for 6 hours, and obtain an orange-red transparent liquid, which is benzylquinoline chloride Quaternary ammonium salt solution.

[0043]After heating and evaporating the solvent water of the above-mentioned benzylquinoline quaternary ammonium salt solution, add acetonitrile to the system as a solvent, and add triethylamine in an equimolar ratio to the initial raw material, and continue heating and stirring at 80-100°C After 2 hours of reaction, benzylquinoline quaternary ammonium chloride undergoes an intermolecular dimerization reaction to obtain a dimer indolezine derivative, which is a dark brown liquid, and evaporates to remove the solvent under heating, which is the main agent of the corrosion inhibitor.

[0044] The acidified corrosion inhibitor product can be obtained by mixing the obtained main agent of corrosion in...

Embodiment 3

[0046] Take pyridine and ethyl α-bromoacetate with a molar ratio of 1:1, use the same molar amount of water as a solvent, heat and stir under reflux at 90-100°C for 4 hours, and obtain a dark yellow transparent liquid, which is brominated acetic acid Ethylpyridinium quaternary ammonium solution.

[0047] After heating and evaporating the solvent water of the above-mentioned bromoacetate-based pyridinium quaternary ammonium salt solution, add N,N dimethylformamide as a solvent to the system, and add triethylamine in an equimolar ratio to the initial raw material, and continue Heating and stirring reaction at 80-100°C for 2 hours, brominated ethyl acetate pyridinium quaternary ammonium salt undergoes intermolecular dimerization reaction to obtain dimer indoleazine derivatives, which are dark orange-red liquids, evaporate and remove the solvent under heating, It is the main agent of corrosion inhibitor.

[0048] The acidified corrosion inhibitor product can be obtained by mixing...

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Abstract

The invention discloses an acidizing corrosion inhibitor based on a dimer indolizine derivative and a preparation method and application of the acidizing corrosion inhibitor. The acidizing corrosion inhibitor contains the dimer indolizine derivative; and the dimer indolizine derivative is mainly obtained by further intermolecular dimerization of active alpha-cetyl trimethyl ammonium chloride of heterocyclic alkali such as (substituted) quinolone and (substituted) pyridine under alkali acceleration. The acidizing corrosion inhibitor has good corrosion inhibition under the condition that a common corrosion inhibition synergist such as alkynol does not need to be compounded, the use amount is small, and when the acidizing corrosion inhibitor is used independently, requirements of first-levelto third-level standard in an acidizing corrosion inhibitor performance testing method and an evaluation index SY / T 5405-1996 can be met and are even higher.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors used in oilfield acidification construction, and in particular relates to an acidification corrosion inhibitor based on dimer indolezine derivatives, a preparation method and application thereof. Background technique [0002] Acidizing refers to a technology that injects a large amount of high-concentration acid liquid into the formation to restore or increase the permeability of the formation, and realize the increase of production of oil and gas wells and the increase of injection of water wells. In acidizing construction, especially when acidizing concentrated hydrochloric acid or a large amount of soil acid (a mixture of hydrochloric acid and hydrofluoric acid prepared in a certain proportion) in high-temperature deep wells, the primary task is to solve the problem of corrosion of oil well casing equipment by acidizing fluid . In addition, the hydrogen gas produced after the reaction betwe...

Claims

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Application Information

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IPC IPC(8): C09K8/74C09K8/54C07D471/14E21B43/22
CPCC09K8/74C07D471/14C09K8/54C09K2208/32E21B43/16
Inventor 王业飞杨震王任卓战风涛陈五花丁名臣吕志凤韩成友
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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