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Compounded imidazoline corrosion inhibitor and preparation method thereof

A technology for compounding imidazoline and corrosion inhibitor, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of single application scope, high production cost, toxicity, etc. corrosion efficiency, inhibition of acid corrosion, and simple preparation process

Inactive Publication Date: 2014-02-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current corrosion inhibitors have more or less disadvantages such as toxicity, instability, large dosage, high production cost and single application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example first provides a compound imidazoline corrosion inhibitor, its raw material composition includes: oleic acid, diethylenetriamine, quaternizing agent, compound, wherein, the compound is pyroantimony acid potassium.

[0025] The present invention also provides the preparation method of above-mentioned composite imidazoline corrosion inhibitor, it comprises the following steps:

[0026] Step 1: Slowly add diethylenetriamine dropwise to the uniformly dissolved oleic acid containing 8mL water-carrying agent and 0.5g ceramic zeolite particles. The molar ratio of oleic acid and diethylenetriamine is 1:1. Stir at ℃, carry out acylation reaction for 2-4h, then raise the temperature to 210-220°C, stir evenly, carry out cyclization reaction for 3-5h, and obtain the imidazoline intermediate;

[0027] Step 2: Cool the imidazoline intermediate to 70-80°C, stir evenly, add a quaternizing agent dropwise to the imidazoline intermediate, the molar ratio of the imidazoline i...

Embodiment 2

[0030] In this implementation, a compound imidazoline corrosion inhibitor is firstly provided, and its raw material composition includes: oleic acid, diethylenetriamine, a quaternizing agent, and a compound, wherein the compound is pyroantimony acid potassium.

[0031] The present invention also provides the preparation method of above-mentioned composite imidazoline corrosion inhibitor, it comprises the following steps:

[0032] Step 1: Slowly add diethylenetriamine dropwise to the uniformly dissolved oleic acid containing 12mL water-carrying agent and 1g ceramic zeolite particles, the molar ratio of oleic acid and diethylenetriamine is 1:1.1, at 150-160°C Stir, carry out 2-4h acylation reaction, then raise the temperature to 210-220°C, stir evenly, carry out cyclization reaction for 3-5h, and obtain the imidazoline intermediate;

[0033] Step 2: Cool the imidazoline intermediate to 70-80°C, stir evenly, add a quaternizing agent dropwise to the imidazoline intermediate, the ...

Embodiment 3

[0036] In this implementation, a compound imidazoline corrosion inhibitor is firstly provided, and its raw material composition includes: oleic acid, diethylenetriamine, a quaternizing agent, and a compound, wherein the compound is pyroantimony acid potassium.

[0037] The present invention also provides the preparation method of above-mentioned composite imidazoline corrosion inhibitor, it comprises the following steps:

[0038] Step 1: Slowly add diethylenetriamine dropwise to the uniformly dissolved oleic acid containing 10mL water-carrying agent and 0.75g ceramic zeolite particles, the molar ratio of oleic acid and diethylenetriamine is 1:1.2, at 150-160℃ Stir under low temperature, carry out acylation reaction for 2-4h, then raise the temperature to 210-220°C, stir evenly, carry out cyclization reaction for 3-5h, and obtain the imidazoline intermediate;

[0039] Step 2: Cool the imidazoline intermediate to 70-80°C, stir evenly, add a quaternization reagent dropwise to th...

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PUM

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Abstract

The invention provides a compounded imidazoline corrosion inhibitor. Raw materials of the compounded imidazoline corrosion inhibitor comprise oleic acid, diethylenetriamine, a quaternizing agent and a compound, wherein the complex is potassium pyroantimonate. The compounded imidazoline corrosion inhibitor is obtained through a step of reacting oleic acid with diethylenetriamine to obtain an imidazoline intermediate, a step of reacting the imidazoline intermediate with the quaternizing agent to obtain an imidazoline quaternary ammonium salt corrosion inhibitor, and a step of compounding by adding the compound. The invention also provides a preparation method of the compounded imidazoline corrosion inhibitor. The complex and the corrosion inhibitor are compounded to form the compounded imidazoline corrosion inhibitor, so the synergistic effect allows the compounded imidazoline corrosion inhibitor to have the advantages of increased corrosion inhibition efficiency, low production cost and simple preparation technology.

Description

technical field [0001] The invention relates to a compound imidazoline corrosion inhibitor and a preparation method thereof, belonging to the technical field of petroleum exploitation and environmental protection materials. Background technique [0002] Metal corrosion is an important destructive factor in modern industry, which brings huge losses to the national economy and production. Therefore, anti-corrosion work is related to a series of major social and economic issues such as protecting resources, saving materials, protecting the environment, saving energy, ensuring personal safety and normal production. Among them, combined with the current actual situation of the oil field, the problem of pipeline corrosion has become increasingly prominent, seriously affecting the production of the oil field. In order to ensure the stability and production increase of the oilfield, it has become an urgent problem to be solved in the development of the oilfield to solve the corrosi...

Claims

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Application Information

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IPC IPC(8): C09K8/54C23F11/14C23F11/18
CPCC09K8/54C09K2208/32C23F11/149C23F11/184
Inventor 张群王浩许占双郑猛周飞梁凌熏刘晶晶柳燕丽赵大朋王培凇
Owner PETROCHINA CO LTD
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