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A kind of corrosion inhibitor for suppressing h2s/co2 corrosion and preparation method thereof

A corrosion inhibitor and CO2 technology, which is applied in earthwork drilling, wellbore/well components, etc., can solve the problems of cumbersome preparation, low efficiency and high cost of imidazoline quaternary ammonium compounds

Inactive Publication Date: 2011-12-07
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN1052151A discloses a heptadecenyl imidazoline oilfield corrosion inhibitor used for gathering pipelines and sewage treatment stations, but its usage is large, its efficiency is low, and its cost is high
CN1966774A discloses a kind of suppressing oil and gas field exploitation, gathering and transporting process associated H 2 S and CO 2 Corrosion inhibitor, but the preparation of imidazoline quaternary ammonium compound in the corrosion inhibitor is cumbersome, and the corrosion inhibition effect of the corrosion inhibitor is poor above 100°C and in a higher pressure environment

Method used

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  • A kind of corrosion inhibitor for suppressing h2s/co2 corrosion and preparation method thereof
  • A kind of corrosion inhibitor for suppressing h2s/co2 corrosion and preparation method thereof
  • A kind of corrosion inhibitor for suppressing h2s/co2 corrosion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Mix and stir thiourea and β-hydroxyethylethylenediamine according to the molar ratio of 1:1, heat up to 160°C and react for 4 hours; after cooling below 90°C, add oleic acid according to the molar ratio of 1:0.9 molar ratio of thiourea, After the addition is complete, react at a temperature of 150° C. for 3 hours, and obtain the imidazolidinethione derivative I after cooling.

Embodiment 2

[0028] According to the method similar to the preparation of imidazolidinethione derivative I in Example 1, linoleic acid was used instead of oleic acid to prepare imidazolidinethione derivative II.

Embodiment 3

[0030] Mix and stir thiourea and β-hydroxyethylethylenediamine according to the molar ratio of 1:1.5, heat up to 160°C and react for 4 hours; after cooling below 90°C, add oleic acid according to the molar ratio of 1:1 molar ratio of thiourea, After the addition, the reaction was carried out at 150°C for 3 hours, and the imidazolidinethione derivative III was obtained after cooling.

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PUM

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Abstract

The invention discloses a corrosion inhibitor for inhibiting H2S / CO2 corrosion and a preparation method thereof. The corrosion inhibitor is a composition, and its composition and content are: (A) imidazolidinethione derivative 20% by weight to 60% by weight %; (B) acetylene alcohol 5% by weight to 20% by weight; (C) surfactant 1% by weight to 10% by weight; (D) solvent 20% by weight to 50% by weight, wherein the preparation of imidazolidinethione derivatives The raw materials are thiourea, β-hydroxyethylethylenediamine and fatty acids. The corrosion inhibitor is especially suitable for inhibiting H2S / CO2 corrosion in oil fields.

Description

technical field [0001] The invention belongs to the field of metal corrosion inhibition, and more specifically relates to a method for inhibiting H 2 S / CO 2 Corrosion inhibitor and preparation method thereof, especially suitable for suppressing H in oil and gas fields 2 S / CO 2 corrosion. Background technique [0002] During the development of oil and gas fields, the CO contained in oil and gas 2 、H 2 S and other corrosive media, together with formation water and condensate water, is one of the main reasons for the damage of metal materials in the process of oil and gas well exploitation and transportation. With the rapid development of the oil and gas industry, CO 2 、H 2 Oil and gas fields where S and other corrosive media coexist have appeared one after another, and the accidents caused by them have become more and more serious, causing huge economic losses and serious social consequences. At present, there are three main anti-corrosion measures: selecting corrosion...

Claims

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Application Information

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IPC IPC(8): C23F11/16C09K8/54
Inventor 崔中强段永锋申明周李朝法刘希武唐应彪
Owner CHINA PETROCHEMICAL CORP
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