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A kind of amine derivative corrosion inhibitor and its application

A technology of amine derivatives and corrosion inhibitors, applied in the application of amine derivatives corrosion inhibitors, the field of amine derivatives corrosion inhibitors, can solve the problem of poor adsorption, poor film formation, poor corrosion inhibition effect, and easy coking and other problems, to achieve the effects of tightness suppression, small environmental impact, and control of metal corrosion

Active Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing corrosion inhibitors have poor adsorption and film-forming properties, are easy to coke, have poor corrosion inhibition effects, and contain low boiling point, volatile and highly toxic substances C Defects such as acetylenic alcohol components, providing an amine derivative corrosion inhibitor

Method used

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  • A kind of amine derivative corrosion inhibitor and its application
  • A kind of amine derivative corrosion inhibitor and its application
  • A kind of amine derivative corrosion inhibitor and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a reactor with a stirrer and a thermometer, add 50 parts of absolute ethanol, add 34 parts of alachlor, 21 parts of homocysteine ​​thiolactone, and 45 parts of sodium hydroxide in parts by mass, and stir until completely Dissolve, heat up to 80°C, ethanol boil and reflux and keep reacting for 4 hours, replace the rotary evaporator, remove ethanol by evaporation and suction filtration, and obtain light yellow viscous amine derivative corrosion inhibitor M1, chemical name is S-( 2',6'-diethyl-N-methoxymethyl-acetanilide)-N-acetyl-2-amino-3-mercaptopropionic acid, molecular weight 400, its molecular formula is:

[0019]

Embodiment 2

[0021] In a reactor with a stirrer and a thermometer, add 50 parts of absolute ethanol, add 27 parts of acetochlor, 17 parts of homocysteine ​​thiolactone, and 56 parts of potassium hydroxide in parts by mass, and stir until completely Dissolve, heat up to 80°C, ethanol boils and reflux and keep reacting for 4 hours, replace the rotary evaporator, remove ethanol by evaporation and suction filtration, and obtain a light yellow viscous amine derivative corrosion inhibitor M2, the chemical name is S-( 2'-Ethyl-6'-methyl-N-ethoxymethyl-acetanilide)-N-acetyl-2-amino-3-mercaptopropionic acid, the molecular weight is 380, and its molecular formula is:

[0022]

Embodiment 3

[0024] In the reactor with agitator and thermometer, add 50 parts of absolute ethanol, add 35 parts of metolachlor, 19 parts of homocysteine ​​thiolactone, 46 parts of sodium hydroxide according to the mass fraction, stir Until it is completely dissolved, heat up to 80°C, boil and reflux the ethanol and keep the reaction for 4 hours, replace the rotary evaporator, remove the ethanol by evaporation and suction filtration, and obtain a light yellow viscous amine derivative corrosion inhibitor M3, the chemical name is S -(2'-Ethyl-6'-methyl-N-1-methyl-2-methoxyethyl-acetanilide)-N-acetyl-2-amino-3-mercaptopropionic acid, molecular weight 394 , whose molecular formula is:

[0025]

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Abstract

The invention relates to an amine derivative corrosion inhibitor and application thereof, and belongs to the technical field of chemical agents for oil and gas fields. An amine derivative corrosion inhibitor M contains a structural general formula shown in the specification. A compound corrosion inhibitor containing amine derivatives is prepared from the following materials in percentage by mass: 5 to 10 percent of an amine derivative corrosion inhibitor M, 5 to 10 percent of alkynol, 5 to 10 percent of organic amine, 10 to 16 percent of alkylphenol polyoxyethylene ether, 10 to 20 percent of polycyclic aromatic hydrocarbon oil, 10 to 16 percent of a pitting inhibitor and 20 to 40 percent of low molecule alcohol. According to the amine derivative corrosion inhibitor, nitrogen, oxygen and sulfur elements of which the outermost layers are provided with nonbonding electron pairs respectively are gathered on one compound, so that a multi-adsorption center is generated on the surface of metal, and metal corrosion is controlled; tight adsorption of the corrosion inhibitor on the surface of the metal at a high temperature is guaranteed by virtue of an alkynol corrosion inhibitor.

Description

technical field [0001] The invention relates to an amine derivative corrosion inhibitor, in particular to the application of an amine derivative corrosion inhibitor, and belongs to the technical field of chemical agents for oil and gas fields. Background technique [0002] During the production of high-sulfur natural gas, it was found that most of the gas wells were clogged, and the clogging location was mainly concentrated in the production zone, which affected the development of production testing, reservoir reconstruction and other technological measures, and also affected the productivity of gas wells. Therefore, it is necessary to Unblock. According to the characteristics of blockages, it is relatively feasible to use coiled tubing acid injection to flush out wellbore plugging, but in the process of wellbore plugging removal with hydrochloric acid-based acid liquid, coiled tubing is required to have better corrosion resistance, hydrogen embrittlement resistance and The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C319/14C07C323/59C09K8/54
Inventor 惠小敏张庆生张文昌黄雪松张诚王树涛汪沈阳董琴刚
Owner CHINA PETROLEUM & CHEM CORP