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Metallic ionic liquid corrosion inhibitor and preparation method thereof

A metal ion and corrosion inhibitor technology, which is applied in chemical instruments and methods, bulk chemical production, drilling composition, etc. , a wide range of effects

Inactive Publication Date: 2018-01-19
浙江星丰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent application number 201310545698.0 discloses an imidazolium salt ionic liquid acidification corrosion inhibitor and its preparation method and application. The ionic liquid corrosion inhibitor has a good inhibitory effect on the corrosion of N80 steel sheets below 70 °C, and solves the problem of Insufficiency of existing corrosion inhibitors with large toxic and side effects

Method used

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  • Metallic ionic liquid corrosion inhibitor and preparation method thereof
  • Metallic ionic liquid corrosion inhibitor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Mix 1mmol hexafluoroacetylacetone and 1.5mmol ammonia water in acetonitrile, neutralize and react at 20°C for 10h; add copper chloride for coordination reaction after the reaction; react at 80°C for 8h and add 1-tetradecyl 3- Methylimidazolium chloride, remove the solvent to obtain a crude product; dissolve the obtained crude product in ethyl acetate, then add an equal volume of water, shake for 5 minutes, static layer, separate the liquid to remove the water layer, repeat the above steps 3 times , collecting the ionic liquid-rich phase; removing ethyl acetate by rotary evaporation, and vacuum-drying the obtained product for 24 hours to obtain the metal ionic liquid corrosion inhibitor.

Embodiment 2

[0031] Mix 1mmol hexafluoroacetylacetone and 2mmol ammonia water in acetone, neutralize and react at 40°C for 15h; add ferrous chloride for coordination reaction after the reaction; add 1-hexadecyl 3- Methylimidazolium chloride, remove the solvent to obtain a crude product; dissolve the obtained crude product in ether, then add an equal volume of water, shake for 10 minutes, static layer, separate liquid to remove the water layer, repeat the above steps 5 times, collect The ionic liquid-rich phase; the ether was removed by rotary evaporation, and the obtained product was vacuum-dried for 22 hours to obtain the metal ionic liquid corrosion inhibitor.

Embodiment 3

[0033] Mix 1mmol hexafluoroacetylacetone and 1.7mmol ammonia water in acetone, neutralize at 30°C for 20h: after the reaction, add manganese chloride for coordination reaction; react at 70°C for 36h, add 1-dodecyl 3- Methylimidazolium chloride, remove the solvent to obtain a crude product; dissolve the obtained crude product in ethyl acetate, then add an equal volume of water, shake for 3 minutes, static layer, separate the liquid to remove the water layer, repeat the above steps 4 times , collecting the ionic liquid-rich phase; removing ethyl acetate by rotary evaporation, and vacuum-drying the obtained product for 20 hours to obtain the metal ionic liquid corrosion inhibitor.

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Abstract

The invention relates to the field of metallic corrosion prevention and discloses a metallic ionic liquid corrosion inhibitor and a preparation method thereof. The corrosion inhibitor has metal-chelating type anions and imidazole cations, has stable property under high temperature, can be applied to the high-temperature operation environment, such as an oil-well acidizing process under high temperature condition, can form an adsorbing layer on the metal surface, can increase the concentration of the corresponding metal ions in the environment, has excellent corrosion inhibition property and isan efficient green corrosion inhibitor.

Description

technical field [0001] The invention relates to the field of metal anticorrosion, in particular to a metal ionic liquid corrosion inhibitor and a preparation method thereof. Background technique [0002] Acidizing of oil and gas wells has become one of the main measures to increase production of oil and gas fields at home and abroad. However, during the acidizing process, during the process of injecting acid into the tubing, the acid liquid will cause metal corrosion of oil and gas well tubing and downhole equipment, and sometimes may cause downhole tubing and casing. Equipment pitting and corrosion fractures cause sudden accidents. At the same time, after acidification, the dissolved metal ions will produce hydroxide precipitation with the increase of pH value, causing serious damage to the formation. Therefore, slowing down must be added to the acid solution etchant. [0003] As an economical and efficient anti-corrosion method, corrosion inhibitor plays an important role...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C07D233/58
CPCY02P20/54
Inventor 谢土根
Owner 浙江星丰科技有限公司
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