Corrosion inhibitor and preparation method thereof

A technology of corrosion inhibitors and surfactants, applied in the field of high temperature resistant corrosion inhibitors and its preparation, can solve the problems of inconvenient use of corrosion inhibitors, achieve good acid gas corrosion resistance, excellent resistance to general corrosion and localized corrosion , Good anti-H2S hydrogen embrittlement effect

Active Publication Date: 2013-09-11
安东地质工程技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This shows that above-mentioned existing corrosion inhibitor obviously still has inconvenience and defective in use, and demands urgently further improving

Method used

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  • Corrosion inhibitor and preparation method thereof
  • Corrosion inhibitor and preparation method thereof
  • Corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 250mL three-necked grinding bottle with a condensing reflux tube, add sinapinic acid, diethylenetriamine and aluminum oxide as a catalyst, and at the same time add water-carrying agent xylene to stir and reflux, react for 4h to 6h, and the reaction temperature is 180 °C to 200 °C, distill off xylene under reduced pressure at 140 °C to obtain an intermediate product of imidazoline.

[0023] Add benzyl chloride to the above intermediate product and react at 90-100°C for 3 hours, then add 1,4 dichlorobutane to carry out splicing reaction, react for 3h-4h, and the reaction temperature is 80°C-90°C to obtain the final product It is a brown thick liquid, and the mass percentage of active ingredients is 81%-85%. The structural formula of the active ingredient is as follows:

[0024]

[0025] Gemini imidazoline quaternary ammonium salts with other structures can be obtained by replacing sinapinic acid with oleic acid or other fatty acids, which will not be repeated her...

Embodiment 2

[0027] Add pyridine and triethylamine to a 250mL three-neck ground flask with a condensing reflux tube, and at the same time add water-carrying agent xylene for stirring and reflux, react for 3h to 4h, and the reaction temperature is 140°C to 180°C, at 120°C The xylene was distilled off under reduced pressure to obtain the intermediate product of pyridine base.

[0028] Add benzyl chloride to the above intermediate product, react at 120-140°C for 3-4 hours, then add 1,4 dichlorobutane to carry out splicing reaction, react for 2h-3h, and the reaction temperature is 80°C-90°C , the final product obtained is a brown thick liquid, and the mass percentage of the active ingredient is 79%-81%. The structural formula of the active ingredient is as follows:

[0029]

[0030] Gemini pyridinium quaternary ammonium salts of other structures can be obtained by replacing pyridine with pyridine homologues, which will not be repeated here.

Embodiment 3

[0032] In the reactor, add the following components in mass percentage successively:

[0033]

[0034] Stir well at 50-60°C for 1-2 hours to prepare corrosion inhibitor.

[0035] The performance test of the corrosion inhibitor obtained in this example was carried out at 90°C, and the results are shown in Table 1:

[0036] Table 1 Performance test of the corrosion inhibitor obtained in Example 1

[0037]

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PUM

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Abstract

The invention discloses a corrosion inhibitor and a preparation method thereof. The corrosion inhibitor is composed of the following components in percentage by mass: 10-30% of a bis-imidazoline quaternary-ammonium-salt surfactant, 10-60% of a bis-pyridine quaternary-ammonium-salt surfactant, 5-10% of a mutual solvent, 2-5% of a synergist, and 15-60% of a solvent. The corrosion inhibitor disclosed by the invention is good in corrosion inhibition effect, and capable of being used at a high temperature.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors, in particular to a high temperature resistant corrosion inhibitor used for acidizing treatment in the development process of oil and gas wells and a preparation method thereof. Background technique [0002] Oil well acidizing operation is the main measure to increase oil production. With the continuous emergence of deep wells and ultra-deep wells, for the complex acidizing operations of these oil wells, the existing corrosion inhibitors on the market show problems such as poor acid solubility, poor temperature resistance, and poor corrosion inhibition performance. If the protective ability of corrosion inhibitors to downhole metal equipment and pipelines is improved by increasing the dosage of corrosion inhibitors, it will not only increase the cost of acidizing operations, but also have adverse effects on acidizing operations, and may cause damage to the formation. At the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/54
Inventor 徐太平方也王鹏
Owner 安东地质工程技术研究院(北京)有限公司
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