Alkynol-based imidazoline compound, corrosion inhibitor for carbon dioxide oil displacement, and preparations of alkynol-based imidazoline compound and corrosion inhibitor

A technology based on imidazoline and carbon dioxide, which is applied in drilling compositions, organic chemistry, mechanical equipment, etc., can solve the problems of small amount of corrosion inhibitor and poor corrosion inhibition performance, and achieve good corrosion inhibition effect

Active Publication Date: 2017-03-08
武汉楚博士科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide acetylenic alcohol-based imidazoline compounds, corrosion inhibitors for carbon dioxide flooding and their preparation, wherein through the key acetylenic alcohol-based imidazoline compounds Preparation method (especially the overall process setting of the preparation process, and the reaction parameters in each reaction step, such as the proportion of reactants, reaction temperature, time), and the application and application method of the alkynyl imidazoline compound (such as The proportioning amount of acetylenic imidazoline compound in the corrosion inhibitor, and the proportioning amount of other constituent raw materials) etc. are improved, and compared with the prior art, it can effectively solve the problem of CO 2 The problem of poor corrosion inhibition performance of corrosion inhibitors, the corrosion inhibitors prepared by using the acetylenic imidazoline compound for carbon dioxide flooding can effectively inhibit the corrosion of pipelines in the process of carbon dioxide flooding, especially for the carbon dioxide flooding process Supercritical CO in the process 2 Corrosion has a significant inhibitory effect, and the amount of corrosion inhibitor used in the carbon dioxide flooding process is small, the corrosion inhibition effect is remarkable, and it has good resistance to high temperature carbon dioxide corrosion

Method used

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  • Alkynol-based imidazoline compound, corrosion inhibitor for carbon dioxide oil displacement, and preparations of alkynol-based imidazoline compound and corrosion inhibitor
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  • Alkynol-based imidazoline compound, corrosion inhibitor for carbon dioxide oil displacement, and preparations of alkynol-based imidazoline compound and corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 282 grams of oleic acid and 103 grams of diethylenetriamine were dropped into the three-necked flask, and the heating and stirring reaction was started. When the reaction temperature reaches 150°C, maintain the temperature for 3 hours; continue to raise the temperature to 200°C, maintain the temperature for 3 hours; further raise the temperature to 230°C, maintain the temperature for 3 hours to obtain the oleic acid-based imidazoline intermediate.

[0043]

[0044] Put 174.5 grams of oleic acid-based imidazoline prepared above, 35 grams of formaldehyde solution (40% in mass concentration) and 35 grams of 3-butyn-1-ol into a three-necked flask, raise the temperature to 90° C., and maintain the temperature for 6 hours, the acetylenol-based imidazoline intermediate was obtained.

[0045]

[0046] In the there-necked flask, add 40 grams of acetylenyl imidazoline prepared above, 25 grams of isopropanol, 15 grams of OP-10, 3 grams of potassium iodide and 17 grams of wat...

Embodiment 2

[0054] 338 grams of erucic acid and 195 grams of tetraethylenepentamine were dropped into the three-necked flask, and the heating and stirring reaction was started. When the reaction temperature reaches 150°C, maintain the temperature for 3 hours; continue to raise the temperature to 200°C, maintain the temperature for 3 hours; further raise the temperature to 230°C, maintain the temperature for 3 hours to obtain the erucic acid imidazoline intermediate.

[0055]

[0056] Put 245.5 grams of erucyl imidazoline prepared above, 37 grams of formaldehyde solution (38% in mass concentration) and 28 grams of 2-propyn-1-ol into a three-necked flask, heat up to 90° C., and maintain the temperature for 6 hours, the acetylenol-based imidazoline intermediate was obtained.

[0057]

[0058] In the there-necked flask, add 48 grams of acetylenyl imidazoline prepared above, 20 grams of ethylene glycol, 20 grams of OP-10, 2 grams of potassium iodide and 10 grams of water and stir to obta...

Embodiment 3

[0066] 200 grams of lauric acid and 148 grams of triethylenetetramine were dropped into a three-necked flask, and the heating and stirring reaction was started. When the reaction temperature reaches 150°C, maintain the temperature for 3 hours; continue to raise the temperature to 200°C, maintain the temperature for 3 hours; further raise the temperature to 230°C, maintain the temperature for 3 hours to obtain the lauryl imidazoline intermediate.

[0067]

[0068] Put 155 grams of the above-prepared lauryl imidazoline, 35 grams of formaldehyde aqueous solution (mass concentration of 40%) and 45 grams of 4-pentyn-1-ol into a three-necked flask, raise the temperature to 90 ° C, and maintain the temperature for 6 hours , to obtain the alkynol-based imidazoline intermediate.

[0069]

[0070] In the there-necked flask, add 35 grams of the above-prepared acetylenol-based imidazoline, 30 grams of ethanol, 10 grams of OP-10, 5 grams of sodium iodide and 20 grams of water and sti...

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Abstract

The present invention discloses an alkynol-based imidazoline compound, a corrosion inhibitor for carbon dioxide oil displacement, and preparations of the alkynol-based imidazoline compound and the corrosion inhibitor, wherein the alkynol-based imidazoline compound has the following structure formula represented by a formula (I), and the corrosion inhibitor for carbon dioxide oil displacement comprises the alkynol-based imidazoline compound. According to the present invention, by improving the key alkynol-based imidazoline compound preparation method, the applications of the alkynol-based imidazoline compound, the application method and the like, the poor corrosion inhibition of the CO2 corrosion inhibitor can be effectively solved, and the corrosion inhibitor used for carbon dioxide oil displacement and prepared by using the alkynol-based imidazoline compound can effectively inhibit the corrosion on the pipeline during the carbon dioxide oil displacement process. The formula (I) is defined in the specification.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and more specifically, relates to an alkynyl imidazoline compound, a corrosion inhibitor for carbon dioxide flooding and their preparation. The alkynyl imidazoline compound is a corrosion inhibitor for carbon dioxide flooding An important component of the corrosion inhibitor is very suitable for carbon dioxide flooding process. Background technique [0002] When CO 2 When the temperature exceeds 31.1°C and the pressure is higher than 7.38MPa, it enters the supercritical state. At present, supercritical CO is widely used at home and abroad 2 Carry out oil displacement and gas displacement for low permeability oil and gas reservoirs. Due to supercritical CO 2 No surface tension, low viscosity, large diffusion coefficient, so supercritical CO 2 After being injected into the formation, it can enter various tiny voids and displace the crude oil in the voids; at the same time, supercritical CO 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/16C09K8/54C09K8/594F16L58/00
CPCC07D233/16C09K8/54C09K8/594F16L58/00
Inventor 陈振宇魏莉莎岑宏宇方璐张佑庭
Owner 武汉楚博士科技股份有限公司
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