Mannich base corrosion inhibitor against CO2 corrosion under high flow rate environment and preparation method thereof

A Mannich base, high flow rate technology, applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as unpleasant odor, easy desorption, easy hydrolysis, etc., and achieve simple and fast production. High corrosion inhibition efficiency and good dispersion effect

Active Publication Date: 2015-10-28
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of corrosion inhibitor has a good corrosion inhibition effect, but its disadvantages are its unpleasant smell, easy hydrolysis, short validity period, and easy desorption under high flow conditions, such as a patented new organic amine adsorption membrane for oil fields A method for preparing a type corrosion inhibitor (CN 201210010433), a water-soluble imidazoline amide corrosion inhibitor and its preparation and use method (CN101705112A) and a corrosion inhibitor composition (201210380382) are based on imidazoline derivatives main component
However, this corrosion inhibitor is easy to desorb in a high flow rate environment, resulting in a sharp drop in anticorrosion effect

Method used

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  • Mannich base corrosion inhibitor against CO2 corrosion under high flow rate environment and preparation method thereof
  • Mannich base corrosion inhibitor against CO2 corrosion under high flow rate environment and preparation method thereof
  • Mannich base corrosion inhibitor against CO2 corrosion under high flow rate environment and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Anti-CO in high flow environment 2 Corrosion Mannich base corrosion inhibitor, by weight fraction ratio, comprises the following components:

[0028] Main ingredient 1-Diallylaminomethylbenzimidazole 30%, its structural formula is:

[0029]

[0030] Acetic acid 8%;

[0031] Benzyl alcohol 15%;

[0032] Triethanolamine 10%;

[0033] Octylphenol polyoxyethylene ether 6%;

[0034] Methanol 31%.

[0035] Described acetic acid is hydrochloric acid, and mass concentration is 36.5%.

Embodiment 2

[0037] Anti-CO in high flow environment 2 Corrosion Mannich base corrosion inhibitor, by weight fraction ratio, comprises the following components:

[0038] Main ingredient 1-Diallylaminomethylbenzimidazole 30%, its structural formula is:

[0039]

[0040] Acetic acid 8%;

[0041] Benzyl alcohol 20%;

[0042] Diethanolamine 5%;

[0043] Octylphenol polyoxyethylene ether 6%;

[0044] Ethanol 31%.

[0045] Described acetic acid is hydrochloric acid, and mass concentration is 36.5%.

Embodiment 3

[0047] Anti-CO in high flow environment 2 Corrosion Mannich base corrosion inhibitor, by weight fraction ratio, comprises the following components:

[0048] Main agent 1-diallylaminomethylbenzimidazole 35%, its structural formula is:

[0049]

[0050] Acetic acid 9%; Benzyl alcohol 20%; Triethanolamine 6%; Polyoxyethylene sorbitan monooleate (Tween-80) 7%; Methanol 23%.

[0051] Described acetic acid is hydrochloric acid, and mass concentration is 36.5%.

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Abstract

The invention discloses a mannich base corrosion inhibitor for preventing CO2 corrosion in a high flow speed environment. The mannich base corrosion inhibitor is a compound which is prepared from the following components in percentage by weight: 30-40% of a main agent 2-dipropylene amino-methyl benzimidazole, 10-20% of benzyl alcohol, 5-10% of monoethanolamine, 5-7% of an emulsifier and 23-50% of a solvent, wherein a preparation method of the main agent comprises the following steps: 1) pouring benzimidazole and acetic acid into an enamel reaction kettle according to a mole ratio of 1:1, and uniformly mixing; 2) sequentially adding paraformaldehyde and dipropylene amino, uniformly stirring, heating to be 80-90 DEG C, and reacting for 12 hours, thereby obtaining 2-dipropylene amino-methyl benzimidazole, wherein the mole ratio of benzimidazole and paraformaldehyde to dipropylene amino is 1:1.5:1. The mannich base corrosion inhibitor has the advantages that no bad irritation odor is generated, the dosage small corrosion efficiency is high, the production is simple, rapid and convenient, good dispersion is achieved, an adsorption membrane is uniform and dense, and a material can be protected without spot corrosion or pitting corrosion.

Description

technical field [0001] The invention belongs to the technical field of protection of metal materials in petrochemical industry, and in particular relates to anti-CO 2 Corrosion Mannich base corrosion inhibitor and preparation method thereof, suitable for pipeline steel CO in oil and gas field surface gathering and transportation system 2 Corrosion corrosion protection. Background technique [0002] In the process of oil and gas field development, carbon dioxide corrosion not only causes huge economic losses, but also brings some catastrophic consequences. Carbon dioxide dissolved in water is extremely corrosive to some metal materials, and the resulting corrosion is collectively referred to as CO 2 corrosion. At the same pH value, CO 2 Aqueous solutions are more corrosive than hydrochloric acid. Especially in recent years containing CO 2 The continuous development of sour oil and gas fields and foreign countries containing CO 2 The continuous increase of crude oil inp...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C23F11/04C07D235/06
CPCC09K8/54C09K2208/32C23F11/10C23F11/149
Inventor吕祥鸿赵国仙郭霄鹏薛艳张钧李丹平李健
OwnerXI'AN PETROLEUM UNIVERSITY