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Preparation method and application of Mannich base quaternary ammonium salt high-temperature resistant acidification corrosion inhibitor

一种酸化缓蚀剂、曼尼希碱的技术，应用在化学仪器和方法、有机化学、钻孔的组合物等方向，能够解决不利安全生产和环境保护、制备工艺要求高等问题，达到抑制腐蚀、吸附牢固、制备方法简单的效果

Active Publication Date: 2019-05-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials such as lithium hydroxide are highly toxic substances, which have high requirements on the preparation process, which is not conducive to safe production and environmental protection.

Method used

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  • Preparation method and application of Mannich base quaternary ammonium salt high-temperature resistant acidification corrosion inhibitor
  • Preparation method and application of Mannich base quaternary ammonium salt high-temperature resistant acidification corrosion inhibitor
  • Preparation method and application of Mannich base quaternary ammonium salt high-temperature resistant acidification corrosion inhibitor

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Effect test

Embodiment 1

[0021] A preparation method of Mannich base quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0022] (1) Add 1.97g of dibenzylamine into a 250mL three-necked flask, then slowly add 1.88g of 3-(2-thienyl)benzaldehyde, while adding 70mL of absolute ethanol as a solvent and stir evenly, and put the reaction system Put it into a constant temperature water bath, stir and react at 70°C for 1h;

[0023] (2) Add 1.46 g of benzylidene acetone to the flask, use hydrochloric acid solution to adjust the pH value of the reaction system to 4, react for 8 hours, and after cooling to room temperature, remove the solvent by distillation under reduced pressure to obtain the Mannich base;

[0024] (3) Add 5.13 g of the above-mentioned Mannich base product into a 250 mL three-necked flask, add 110 mL of absolute ethanol as a solvent and stir evenly, slowly add 1.27 g of benzyl chloride and stir evenly, stir and react at 80°C for 12 hour...

Embodiment 2

[0029] A preparation method of Mannich base quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0030] (1) Add 2.51g of benzhydrylpiperidine into a 250mL three-necked flask, then slowly add 1.32g of cinnamaldehyde, and at the same time add 100mL of absolute ethanol as a solvent and stir evenly, and put the reaction system into a constant temperature water bath , stirred and reacted at 70°C for 1h;

[0031] (2) Add 3.12g stilbene acetone to the flask, use hydrochloric acid solution to adjust the pH value of the reaction system to 4, react for 8h, after cooling to room temperature, remove the solvent by distillation under reduced pressure to obtain the Mannich base;

[0032] (3) Add 6.77g of the above-mentioned Mannich base product into a 250mL three-necked flask, add 120mL of acetonitrile as a solvent and stir well, slowly add 1.76g of chloromethylnaphthalene and stir well, stir and react at 85°C for 12h, and cool to A...

Embodiment 3

[0035] A preparation method of Mannich base quaternary ammonium salt high temperature acidification corrosion inhibitor, comprising the following steps:

[0036] (1) Add 1.17g of indole to a 250mL three-necked flask, then slowly add 1.32g of cinnamaldehyde, and at the same time add 90mL of absolute ethanol as a solvent and stir evenly, and put the reaction system in a constant temperature water bath. Stir the reaction for 1h;

[0037] (2) Add 1.46 g of benzylidene acetone to the flask, use hydrochloric acid solution to adjust the pH value of the reaction system to 3, react for 9 hours, and after cooling to room temperature, remove the solvent by distillation under reduced pressure to obtain the Mannich base;

[0038] (3) Add 3.77g of the above-mentioned Mannich base product into a 250mL three-necked flask, add 110mL of absolute ethanol as a solvent and stir evenly, slowly add 2.78g of triphenylchloromethane and stir evenly, and stir and react at 80°C for 13h, After cooling to...

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Abstract

The invention discloses a preparation method and application of a Mannich base quaternary ammonium salt high-temperature resistant acidification corrosion inhibitor. The preparation method comprises the following steps that (1) amine indole, benzhydrylpiperidine, diphenylethylamine, dibenzylamine or diisopropanolamine is dissolved in an organic solvent; aldehyde substances of 3 (2 thienyl) benzaldehyde or cinnamyl aldehyde is slowly added; the mixture is put into a thermostat water bath pot; stirring reaction is performed for 1 to 3h at 60 to 80 DEG C; then, ketone substances of benzalacetone,acetone or 1,1 diphenylacetone are added; the PH value is regulated to 3 to 4; reaction is performed for 7 to 10h; cooling is performed to room temperature; reduced pressure distillation is performedfor removing solvents to obtain Mannich base; (2) Mannich base is dissolved in the organic solvent; quaternization reagents of chloromethyl naphthalene, benzyl chloride or triphenylchlorometha are added; reaction is performed for 14 to 16h at 70 to 90 DEG C; cooling is performed to room temperature; reduced pressure distillation is performed. The method is simple and feasible; raw materials are nontoxic; the safe and environment-friendly effects are achieved; the prepared acidification corrosion inhibitor has an obvious inhibition effect on acid corrosion of oil gas well carbon steel.

Description

technical field [0001] The invention relates to a preparation method and application of a Mannich base quaternary ammonium salt high-temperature acidification corrosion inhibitor in the field of corrosion inhibitor materials. Background technique [0002] In the process of oil and gas field stimulation and transformation, fracturing and acidification has become the mainstream way of oil and gas field stimulation and transformation. In the process of acid fracturing, the injection of acid liquid can largely relieve oil and gas wellbore and formation plugging, improve matrix permeability, and thus enhance oil and gas recovery. However, acidizing construction will also bring many problems to the oil field. During the acidizing construction process, the injection of hydrochloric acid and other acid liquids will cause corrosion of oil and gas well pipe strings, construction pipelines and metal equipment, and may lead to sudden rupture of downhole pipes in severe cases. , The pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/08C07D211/14C07D333/22C09K8/74
CPCC07D209/08C07D211/14C07D333/22C09K8/035C09K8/54C09K8/74C09K2208/32
Inventor 王鼎立李勇明陈曦宇江有适朱炬辉
Owner SOUTHWEST PETROLEUM UNIV
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