Anti-sulfur corrosion inhibitor and preparation method thereof

A technology of corrosion inhibitors and solvents, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems that anti-sulfur corrosion inhibitors cannot meet the market demand, etc., to overcome the poor effect, Improve the effect and strengthen the anti-corrosion effect

Inactive Publication Date: 2018-09-07
西安瑞杰实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of oil and gas fields in the middle and later stages, the existing anti-sulfur corrosion inhibi

Method used

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Examples

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preparation example Construction

[0024] The present invention also proposes a preparation method of the above-mentioned anti-sulfur corrosion inhibitor, comprising the following steps:

[0025] 1) According to the mass ratio, first add oleic acid and dioctyl sebacate into the reaction kettle, stir evenly and heat to 120°C for 1-2h;

[0026] 2) Then add diethylenetriamine, heat the temperature to 200°C, and keep it warm for 1-3h;

[0027] 3) Add triethanolamine, continue to stir and stop heating; in this step, it is required to add triethanolamine within 1 hour.

[0028] 4) When the temperature is lower than 80°C, add the surfactant and continue stirring; the stirring time is about 0.5h.

[0029] 5) When the temperature drops to 40°C, add a surfactant and stir evenly to obtain the anti-sulfur corrosion inhibitor.

Embodiment 1

[0032] In the present embodiment, the anti-sulfur corrosion inhibitor includes: 5% oleic acid, 10% dioctyl sebacate, 10% diethylenetriamine, 15% triethanolamine, 5% acetone, surfactant 25% and solvent 30%. Wherein the solvent is ethanol. The surfactant is R 1 -R 2 -R 3 One of them; where R 1 for C 6 -C 22 the alkyl group, R 2 is a benzene ring, R 3 for C(CH 2 CH 2 O) nH, n is 3-60. The preparation method of the anti-sulfur corrosion inhibitor of the present embodiment is as follows:

[0033] According to the mass ratio, first add oleic acid and dioctyl sebacate into the reaction kettle, stir evenly and heat to 120°C for 1-2h; then add diethylenetriamine, heat to 200°C, and keep warm for 1-2 hours 3h; after adding triethanolamine within 1 hour, continue stirring and stop heating; when the temperature is lower than 80°C, add surfactant, continue stirring for 0.5h; when the temperature drops to 40°C, add surfactant, stir evenly to get the obtained product anti-sulfur...

Embodiment 2

[0035] In the present embodiment, the anti-sulfur corrosion inhibitor includes: 30% oleic acid, 20% dioctyl sebacate, 20% diethylenetriamine, 5% triethanolamine, 10% acetone, surfactant 10% and solvent 5%. Wherein the solvent is ethanol. The surfactant is R 1 -R 2 -R 3 Various mixtures in; where R 1 for C 6 -C 22 the alkyl group, R 2 is a benzene ring, R 3 for C(CH 2 CH 2 O) nH, n is 3-60. The preparation method of the anti-sulfur corrosion inhibitor of the present embodiment is as follows:

[0036] According to the mass ratio, first add oleic acid and dioctyl sebacate into the reaction kettle, stir evenly and then heat to 120°C for 2h; then add diethylenetriamine, heat to 200°C, and keep warm for 3h; After adding triethanolamine within one hour, continue stirring and stop heating; when the temperature is lower than 80°C, add surfactant, and continue stirring for 0.5h; when the temperature drops to 40°C, add surfactant, and stir evenly to obtain the antisulfur buff...

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PUM

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Abstract

The invention discloses an anti-sulfur corrosion inhibitor and a preparation method thereof. The anti-sulfur corrosion inhibitor comprises the following components in percentage by mass: 5-30% of oleic acid, 10-35% of dioctyl sebacate, 10-20% of diethylenetriamine, 5-20% of triethanolamine, 5-25% of acetone, 10-35% of surfactant and 5-30% of solvent. The corrosion inhibitor is prepared by taking oleic acid, dioctyl sebacate, diethylenetriamine, triethanolamine, acetone and the like as main components, so that the problem of poor effect of an existing anti-sulfur corrosion inhibitor is solved,the effect of the corrosion inhibitor is further improved, and the corrosion resistance of an anti-sulfur environment is enhanced.

Description

technical field [0001] The invention belongs to the technical field of oil field chemistry and relates to an anti-sulfur corrosion inhibitor, in particular to an anti-sulfur corrosion inhibitor and a preparation method thereof. Background technique [0002] The natural deposition of sulfides in the earth's crust and the formation of sulfides during petroleum evolution inevitably bring about sulfide corrosion problems in all aspects of oil and gas field production. Adding corrosion inhibitors is the most commonly used measure for oil and gas fields to resist sulfide corrosion. Sulfide corrosion includes mercaptan, sulfide, hydrogen sulfide corrosion, etc. Among them, hydrogen sulfide corrosion is the most common, which will cause hydrogen embrittlement of metals, stress failure, etc., and bring safety hazards, accidents and economic losses to oil and gas field production. Adding corrosion inhibitors is the most common measure for oil and gas fields to resist sulfide corrosion...

Claims

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Application Information

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IPC IPC(8): C09K8/54
CPCC09K8/54C09K2208/32
Inventor 郝靖
Owner 西安瑞杰实业股份有限公司
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