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Inhibitor for controlling carbon dioxide corrosion and production thereof

A technology of carbon dioxide and corrosion inhibitors, which is applied in the field of corrosion inhibitors for controlling carbon dioxide corrosion and its preparation, and can solve problems such as poor corrosion inhibitor effects

Inactive Publication Date: 2009-01-21
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the relatively poor shortcoming of existing corrosion inhibitors, provide a kind of corrosion inhibitor with good effect of controlling carbon dioxide corrosion and preparation method thereof

Method used

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  • Inhibitor for controlling carbon dioxide corrosion and production thereof
  • Inhibitor for controlling carbon dioxide corrosion and production thereof

Examples

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preparation example Construction

[0020] The preparation method of the corrosion inhibitor provided by the invention comprises contacting and reacting oleic acid and diethylenetriamine to obtain oleic acid imidazoline; uniformly mixing the oleic acid imidazoline with other components of the corrosion inhibitor.

[0021] The preparation process of the oleic acid imidazoline includes putting oleic acid into a reaction vessel, adding diethylenetriamine under the condition of reflux condensation and stirring, then reacting at 100-150° C. for 2-6 hours, and then reacting at 180-180° C. React at 250°C for 2-6 hours, and finally lower the temperature to 80-100°C to obtain oleic acid imidazoline. Reflux condensation and stirring are required during the reaction. The weight ratio of the amount of oleic acid and diethylenetriamine is 1-5, preferably 1.5-3.

[0022] Add thiourea and isopropanol into water at 40-80°C, and after they are completely dissolved, add polyoxyethylene ether and mix evenly, then add imidazoline o...

Embodiment 1

[0025] This example is used to prepare corrosive media.

[0026] Add 120 grams of sodium chloride into 3880 grams of water, stir to completely dissolve the sodium chloride, and obtain a 3.0% by weight sodium chloride solution as a corrosion medium.

Embodiment 2

[0028] This embodiment is used for preparing imidazoline oleate.

[0029] 50 grams of oleic acid was put into a 500 ml reaction kettle, and 20 grams of diethylenetriamine was slowly added under the conditions of reflux condensation and stirring. Then, the power was turned on, the oil bath was heated, and the reaction was carried out at 110° C. for 3 hours, and then at 200° C. for 5 hours. After that, the heating was stopped, and the temperature was lowered to 90° C. to obtain imidazoline oleate.

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Abstract

An inhibitor which can control the corrosion of the CO2 is made up of the imidazoline oleate 1-70%; the thiourea 0.01-30%; the water 0-60%; polyoxyethylene ether 0-30%; the isopropanol 0-40%. It has the good effect of controlling the corrosion of the CO2.

Description

technical field [0001] The invention relates to a corrosion inhibitor for controlling carbon dioxide corrosion and a preparation method thereof. Background technique [0002] Carbon dioxide widely exists in the development of oil and natural gas, and carbon dioxide is highly corrosive to metal materials after being dissolved in water, thus causing economic losses and safety accidents. In order to prevent and control carbon dioxide corrosion, adding corrosion inhibitors to production equipment is a convenient method. At present, organic compounds with adsorption and coordination functions, containing N, O, S atoms, carboxyl groups, mercapto groups and triple bonds, such as organic amines, amides, and quaternary ammonium salts, are widely used at home and abroad, but the corrosion inhibition effect is poor. The corrosion inhibition effect of using imidazoline or thiourea alone is also poor. Contents of the invention [0003] The purpose of the present invention is to overc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14C23F11/173
Inventor 梅平陈武王志龙艾俊哲熊洪录
Owner YANGTZE UNIVERSITY
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