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Compound containing triple-bond imidazoline, carbon dioxide corrosion inhibitor containing triple-bond imidazoline, and preparation method of carbon dioxide corrosion inhibitor

A technology based on carbon dioxide and imidazoline, applied in chemical instruments and methods, drilling compositions, earthwork drilling and mining, etc., can solve problems such as poor water solubility, layered precipitation, and influence on the use of pharmaceuticals, and achieve good water solubility, good protective effect

Active Publication Date: 2015-04-15
YANAN SHUANG FENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Commonly used imidazoline and amide corrosion inhibitors are generally poor in water solubility. Even if water solubility modification or optimization (such as quaternization, etc.) It is often incompatible with organic phosphoric acid scale inhibitors, salt inhibitors and other oil and gas field chemical additives, and it is easy to cause layered precipitation and other phenomena, which seriously affects the use effect of various chemicals

Method used

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  • Compound containing triple-bond imidazoline, carbon dioxide corrosion inhibitor containing triple-bond imidazoline, and preparation method of carbon dioxide corrosion inhibitor
  • Compound containing triple-bond imidazoline, carbon dioxide corrosion inhibitor containing triple-bond imidazoline, and preparation method of carbon dioxide corrosion inhibitor
  • Compound containing triple-bond imidazoline, carbon dioxide corrosion inhibitor containing triple-bond imidazoline, and preparation method of carbon dioxide corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add sebacic acid and diethylenetriamine with a molar ratio of 1.0:1.5 into the reactor in a certain order, and raise the temperature to 110°C under stirring conditions. At this time, liquid separates and keeps reflux for 1h; then raise the temperature to 140°C, Reflux for 3 hours for amidation reaction; continue to heat up to 280°C and reflux for 3 hours for cyclization reaction to obtain a bis-imidazoline intermediate;

[0033] Lower the temperature of the bis-imidazoline intermediate to 70°C, add propyne chloride according to the molar ratio of bis-imidazoline intermediate: propyne chloride = 1.0:1.5, then raise the temperature to 100°C, and continue the reaction for 3 hours to obtain a brown-yellow uniform viscous liquid , which is the target product - bis-imidazoline compound containing triple bonds.

[0034] The contents are: bisimidazoline containing triple bonds: 40% by weight, OP-10: 3.0% by weight, ethanol: 57% by weight, mixed with each other, and stirred even...

Embodiment 2

[0036] Add adipic acid and triethylenetetramine with a molar ratio of 1.0:1.7 into the reactor in a certain order, and raise the temperature to 120°C under stirring conditions. At this time, liquid separates, and keep reflux for 1.4h; then raise the temperature to 160°C , reflux for 4h for amidation reaction; continue to heat up to 260°C and reflux for 4.5h for cyclization reaction to obtain a bis-imidazoline intermediate.

[0037] Lower the temperature of the bis-imidazoline intermediate to 85°C, add propyne chloride according to the molar ratio of bis-imidazoline intermediate: propyne chloride = 1.0:1.8, then raise the temperature to 130°C, and continue the reaction for 4 hours to obtain a brown-yellow uniform viscous liquid , which is the target product - bis-imidazoline compound containing triple bonds.

[0038] The contents are: triple-bond-containing bis-imidazoline: 45% by weight, OP-10: 3.5% by weight, methanol: 51.5% by weight, mixed with each other, and stirred evenl...

Embodiment 3

[0040] Add sebacic acid and tetraethylenepentamine with a molar ratio of about 1.0:2.05 into the reactor in a certain order, and raise the temperature to 135°C under stirring conditions. At this time, liquid separates and keeps reflux for 1.8h; °C, reflux for 5 hours for amidation reaction; continue to heat up to 240 °C and reflux for 6 hours for cyclization reaction to obtain a bis-imidazoline intermediate.

[0041] Lower the temperature of the bis-imidazoline intermediate to 90°C, add propyne chloride according to the molar ratio of bis-imidazoline intermediate:propyne chloride=1.0:1.7, then raise the temperature to 145°C, and continue the reaction for 5 hours to obtain a brown-yellow homogeneous viscous The liquid is the target product - bis-imidazoline compound containing triple bonds.

[0042] The contents are: bisimidazoline containing triple bonds: 50% by weight, OP-10: 4.0% by weight, methanol: 46% by weight, mixed with each other, and stirred evenly.

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Abstract

The invention relates to a compound containing triple-bond imidazoline, a carbon dioxide corrosion inhibitor containing triple-bond imidazoline, and a preparation method of the carbon dioxide corrosion inhibitor. The carbon dioxide corrosion inhibitor comprises a compound containing triple-bond imidazoline, a non-ionic surfactant, and a solvent composed of alcohols with a low molecular weight. The corrosion inhibitor is used to protect oil well, gas well, and ground gathering pipelines in oil-gas field, and equipment and pipelines of a water treatment system from carbon dioxide corrosion. The triple-bond diimidazoline compound is prepared through the following steps: carrying out intramolecular dehydration reactions and intermolecular dehydration reactions between dicarboxylic acid and polyamine, and then making the reaction products carry out reactions with compounds containing triple-bonds. The triple-bond diimidazoline compound contains a plurality of active adsorption centers such as two five-membered diazaheterocycles, groups containing triple-bonds, and the like. The organic adsorption film formed by the compound has a better protective effect on carbon steel. The provided corrosion inhibitor has good water solubility, so that the corrosion inhibitor can be dissolved in oil-gas filed output liquid with a high mineralization degree without using a solvent composed of alcohols with a lower molecular weight. The carbon dioxide corrosion inhibitor has the advantages of good corrosion inhibiting performance, good compatibility, and high water solubility.

Description

technical field [0001] The invention belongs to the technical field of corrosion protection, and in particular relates to a triple bond-containing imidazoline compound, a triple bond-containing imidazoline carbon dioxide corrosion inhibitor and a preparation method of the carbon dioxide corrosion inhibitor. Background technique [0002] In the process of oil and gas exploitation, oil and gas well corrosion basically involves all types of corrosion, but H 2 S corrosion and CO 2 Corrosion is the most prevalent form of corrosion encountered in oil and gas wells. Dosing corrosion inhibitors is an effective corrosion protection measure, especially in high CO 2 、H 2 During the exploitation of acidic oil and gas such as S, corrosion inhibitors are used to prevent and control acid gas corrosion damage. [0003] At present, the corrosion inhibitors used at home and abroad are basically adsorption corrosion inhibitors, such as chain organic amines and their derivatives, imidazolin...

Claims

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Application Information

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IPC IPC(8): C07D233/16C09K8/54
CPCC07D233/16C09K8/54
Inventor 袁彦峰黄金营景建坤李天降王宪刚
Owner YANAN SHUANG FENG GRP
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