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Compound imidazoline corrosion inhibitor, and preparation method thereof

A technology for compounding imidazoline and imidazoline, applied in the direction of organic chemistry, etc., to achieve the effects of good water solubility, inhibition of metal corrosion, and good corrosion inhibition performance

Inactive Publication Date: 2017-09-22
TIANJIN ZHENGDA SCI &TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the limitation that the existing imidazoline corrosion inhibitors cannot have good corrosion inhibition performance in the pure carbon dioxide environment and the coexistence environment of hydrogen sulfide and carbon dioxide

Method used

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  • Compound imidazoline corrosion inhibitor, and preparation method thereof
  • Compound imidazoline corrosion inhibitor, and preparation method thereof
  • Compound imidazoline corrosion inhibitor, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] step one

[0030] Add triethylenetetramine and octadecenoic acid in a molar ratio of 1.2:1 into a high-temperature reaction kettle equipped with a stirring, condenser, water separator and thermometer, add 60 g of water-carrying agent xylene, and pass through N2 Exclude the air in the system, start stirring and gradually raise the temperature, control the temperature at 135°C for 2 hours, then continue to raise the temperature to 235°C for 3 hours, until the xylene and excess materials are distilled off, and the imidazoline compound I is obtained.

[0031] step two

[0032] Add the imidazoline compound I and 1,4-bis(chloromethyl)benzene obtained in step 1 into a high-temperature reaction kettle equipped with stirring, condenser, water separator and thermometer according to the molar ratio of 2.1:1, Add an appropriate amount of sodium methoxide as a catalyst, pass N2 to remove the air in the system, start stirring and gradually increase the temperature, control the tempe...

Embodiment 2

[0037] step one

[0038] Add diethylenetriamine and lauric acid in a molar ratio of 1.15:1 into a high-temperature reaction kettle equipped with a stirring, condenser, water separator and thermometer, add 60 g of water-carrying agent xylene, and pass N 2 Exclude the air in the system, start stirring and gradually heat up, control the temperature at 130-135°C for 2 hours, then continue to heat up to 235°C for 2-3 hours, until the xylene and excess materials are evaporated to obtain imidazoline Compound I.

[0039] step two

[0040] Add the imidazoline compound I and 1,4-bis(chloromethyl)benzene obtained in step 1 into a high-temperature reaction kettle equipped with stirring, condenser, water separator and thermometer according to the molar ratio of 2.1:1, Add an appropriate amount of sodium methoxide as a catalyst, pass N 2 Exclude the air in the system, start stirring and gradually raise the temperature, control the temperature at 135-140°C for 2 hours to obtain imidazolin...

Embodiment 3

[0046] step one

[0047] Add tetraethylenepentamine and octadecenoic acid in a molar ratio of 1.15:1 into a high-temperature reaction kettle equipped with a stirring, condenser, water separator and thermometer, add 60 g of water-carrying agent xylene, and pass N 2 Exclude the air in the system, start stirring and gradually heat up, control the temperature at 130-135°C for 2 hours, then continue to heat up to 235°C for 2-3 hours, until the xylene and excess materials are evaporated to obtain imidazoline Compound I.

[0048] step two

[0049] Add the imidazoline compound I and 1,4-bis(chloromethyl)benzene obtained in step 1 into a high-temperature reaction kettle equipped with stirring, condenser, water separator and thermometer according to the molar ratio of 2.1:1, Add an appropriate amount of sodium methoxide as a catalyst, pass N 2 Exclude the air in the system, start stirring and gradually raise the temperature, control the temperature at 135-140°C for 2 hours to obtain ...

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Abstract

The invention discloses a compound imidazoline corrosion inhibitor. The compound imidazoline corrosion inhibitor is formed through mixing 20%-30% of imidazoline compound II, 20%-30% of imidazoline compound III, 5% of ethanediol and water. The compound imidazoline corrosion inhibitor disclosed by the invention is applicable to an oil-water mixed liquid system during an oilfield exploitation, production, and storage and transportation process, good in corrosion inhibition performance in an environment of pure carbon dioxide and in an environment of coexistence of hydrogen sulphide and carbon dioxide, and capable of efficiently inhibiting corrosion caused due to H2S, CO2, salts and the like.

Description

technical field [0001] The invention belongs to the field of oilfield chemicals, and in particular relates to a composite imidazoline corrosion inhibitor and a preparation method thereof. Background technique [0002] The process of crude oil extraction, production, storage and transportation has always been accompanied by metal corrosion. From crude oil transmission pipelines to production process equipment, metal corrosion will be encountered to varying degrees. They have brought huge safety hazards to the stable production of oil fields. Corrosion and perforation of crude oil transmission pipelines resulted in severe environmental pollution. The main cause of corrosion is that the H contained in the oil-water mixture 2 S, CO 2 The direct corrosion of corrosive media such as high salt and so on will cause electrochemical corrosion, hydrogen embrittlement and other metal corrosion. [0003] Corrosion inhibitors to control metal corrosion is an effective method commonly u...

Claims

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Application Information

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IPC IPC(8): C23F11/14C07D233/06
CPCC07D233/06C23F11/149
Inventor 李家俊刘玉民吴涛曹阳刘学敏仇进城
Owner TIANJIN ZHENGDA SCI &TECH CO LTD
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