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High temperature resistant corrosion inhibitor and preparation method thereof

A corrosion inhibitor and high temperature resistant technology, applied in the chemical field, can solve the problems of weak adsorption, reduced continuous corrosion inhibition performance, and reduced corrosion inhibition effect, and achieve good corrosion inhibition performance and good continuous corrosion inhibition efficiency

Active Publication Date: 2019-10-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the environment for crude oil extraction is getting worse and worse, the formation temperature of oilfield water injection production is also getting higher and higher, and even some parts have a temperature exceeding 200°C, and imidazoline corrosion inhibitors have a very weak adsorption effect on metals in high temperature environments. Desorption occurs, greatly reducing the corrosion inhibition effect
In addition, imidazoline corrosion inhibitors will be hydrolyzed at high temperature, their own stability will decrease, and their continuous corrosion inhibition performance will be reduced.

Method used

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  • High temperature resistant corrosion inhibitor and preparation method thereof
  • High temperature resistant corrosion inhibitor and preparation method thereof
  • High temperature resistant corrosion inhibitor and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1 provides a kind of high temperature corrosion inhibitor, by weight, at least includes the following components:

[0067]

[0068] The basic catalyst is sodium hydroxide;

[0069] Described solvent is the mixture that Virahol and toluene mix by volume ratio 3:1;

[0070] The benzothiazole derivative is 2-amino-6-hydroxybenzothiazole, the CAS number is 26278795, provided by Beijing Bailingwei Technology Co., Ltd.

[0071] The preparation method of described imidazoline compound, comprises the following steps:

[0072] At 50°C, add 0.25mol oleic acid and 0.25mol diethylenetriamine into a three-necked flask connected with a water separator, add 0.25mol toluene and stir and reflux for 30 minutes to make the system completely in a molten state; then follow the three-stage Heating and dehydration, the first-stage system is heated to 140°C for 4 hours; the second-stage system is heated to 165°C for 2 hours; the third-stage system is heated to 180°C for 4 hours...

Embodiment 2

[0076] Embodiment 2 provides a kind of high temperature resistant corrosion inhibitor, by weight, at least includes the following components:

[0077]

[0078] The basic catalyst is sodium hydroxide;

[0079] Described solvent is the mixture that Virahol and toluene mix by volume ratio 3:1;

[0080] The benzothiazole derivative is 2-amino-6-hydroxybenzothiazole, the CAS number is 26278795, provided by Beijing Bailingwei Technology Co., Ltd.

[0081] The preparation method of described imidazoline compound, comprises the following steps:

[0082] At 50°C, add 0.25mol oleic acid and 0.25mol diethylenetriamine into a three-necked flask connected with a water separator, add 0.25mol toluene and stir and reflux for 30 minutes to make the system completely in a molten state; then follow the three-stage Heating and dehydration, the first-stage system is heated to 140°C for 4 hours; the second-stage system is heated to 165°C for 2 hours; the third-stage system is heated to 180°C f...

Embodiment 3

[0086] Embodiment 3 provides a kind of high temperature corrosion inhibitor, by weight, at least includes the following components:

[0087]

[0088]

[0089] The basic catalyst is sodium hydroxide;

[0090] Described solvent is the mixture that Virahol and toluene mix by volume ratio 3:1;

[0091] The benzothiazole derivative is 2-amino-6-hydroxybenzothiazole, the CAS number is 26278795, provided by Beijing Bailingwei Technology Co., Ltd.

[0092] The preparation method of described imidazoline compound, comprises the following steps:

[0093] At 50°C, add 0.25mol oleic acid and 0.25mol diethylenetriamine into a three-necked flask connected with a water separator, add 0.25mol toluene and stir and reflux for 30 minutes to make the system completely in a molten state; then follow the three-stage Heating and dehydration, the first-stage system is heated to 140°C for 4 hours; the second-stage system is heated to 165°C for 2 hours; the third-stage system is heated to 180°C...

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Abstract

The invention relates to the field of chemistry, in particular to a sulfur-resistant high-temperature-resistant corrosion inhibitor and a preparation method of the sulfur-resistant high-temperature-resistant corrosion inhibitor. The sulfur-resistant high-temperature-resistant corrosion inhibitor comprises, by weight, 15-30 parts of an imidazoline compound, 1.5-2 parts of benzothiazole derivative,0.15-0.5 part of a basic catalyst and 25-35 parts of a solvent. The basic catalyst is alkaline hydroxide, and the solvent is a mixture of alcohols and benzene or homolog of alcohols and benzene. Aftertesting, the sulfur-resistant high-temperature-resistant corrosion inhibitor has good corrosion inhibition performance and continuous corrosion inhibition efficiency at a high temperature of 180 DEGC.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a high temperature resistant corrosion inhibitor and a preparation method thereof. Background technique [0002] Corrosion is a relatively common and serious phenomenon in the oil production industry. The corrosion caused by oil pipelines will bring huge economic losses, and even cause catastrophic accidents and environmental pollution, seriously affecting the production and development of oil fields. In recent years, with the increasing demand for energy, the exploitation of acidic gas fields with high sulfur content has gradually increased. Gas fields with high sulfuric acid content are one of the most severe and harsh corrosive environments in the process of oil extraction, and have more corrosion characteristics and unfavorable factors than ordinary oil and gas fields. Dry acidic gases such as sulfur have little corrosive effect on metals, but they are severely corrosive to pipes an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G75/02C23F11/10C23F11/18
Inventor 何龙石鑫张志宏赵毅刘冬梅李芳许艳艳张江江罗攀登马清杰
Owner CHINA PETROLEUM & CHEM CORP