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Organosilicon-modified corrosion inhibitor and preparation method thereof

A corrosion inhibitor and organosilicon technology, which is applied in the fields of corrosion inhibitors and their preparation, organosilicon-modified corrosion inhibitors and their preparations, and can solve the problems of weak temperature adaptability, unstable film formation on the surface of metal internal components, etc. , achieve strong hydrophobicity and insulation, strengthen surface adsorption and binding force, and improve electron donating ability

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems and deficiencies of the prior art, in order to overcome the defects such as weak temperature adaptability of existing alkylimidazolines and amides and other corrosion inhibitors, and unstable film formation on the surface of some metal internal components, the present invention provides a Composite corrosion inhibitor of nitrogen heterocyclic compound modified with polysiloxane macromolecule with excellent thermal stability, excellent surface adsorption characteristics and stable anti-corrosion film structure and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 400mL of ethylene glycol, first add 200mL of ethylene glycol into a 1000mL round bottom flask, preheat to 75±5°C, add 1.5g of 3-methyl-6-oxindazole under the condition of nitrogen protection and continuous stirring, After completely dissolving, take 20g of hydrogen-containing linear polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 2000, add continuously and slowly, and then pour all the remaining 200mL of ethylene glycol into the container, Heat up to 105±5°C while stirring, then add about 4g of 0.1mol / L sodium hydroxide solution dropwise with a dropper, the reaction process is carried out under nitrogen protection for 7 hours, and finally filter the reaction mixture to remove insoluble matter and reduce pressure The solvent is distilled off to obtain the target product, an organosilicon-modified corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magneti...

Embodiment 2

[0024] Take 500mL of ethylene glycol, first add 250mL of ethylene glycol into a 1000mL round bottom flask, preheat to 85±5°C, add 2.5g of 3-methyl-6-oxindazole under the condition of nitrogen protection and continuous stirring, After completely dissolving, take 20g of hydrogen-containing linear polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 2000, add continuously and slowly, and then pour all the remaining 250mL of ethylene glycol into the container, Heat up to 105±5°C while stirring, then add about 4g of 0.1mol / L sodium hydroxide solution dropwise with a dropper, the reaction process is carried out under nitrogen protection for 7 hours, and finally filter the reaction mixture to remove insoluble matter and reduce pressure The solvent is distilled off to obtain the target product, an organosilicon-modified corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magneti...

Embodiment 3

[0026] Take 400mL of ethylene glycol, first add 200mL of ethylene glycol into a 1000mL round bottom flask, preheat to 75±5°C, add 1.5g of 6-hydroxyindazole under the condition of nitrogen protection and continuous stirring, after completely dissolving, take Add 20g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) with an average molecular weight of about 2000, continuously and slowly, and then pour all the remaining 200mL of ethylene glycol into the container, and heat up to 105±5°C, then drop about 4g of 0.1mol / L sodium hydroxide solution with a dropper, the reaction process was carried out under nitrogen protection for 7 hours, and finally the reaction mixture was filtered to remove insoluble matter and the solvent was distilled off under reduced pressure, that is The target product, an organosilicon-modified corrosion inhibitor, was obtained. The content of residual active hydrogen in the target product is determined by nu...

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Abstract

The invention relates to an organosilicon-modified corrosion inhibitor and a preparation method thereof, especially to the organosilicon-modified corrosion inhibitor capable of reducing the surface corrosion rate of metal and improving the corrosion resistance of an oil refining apparatus, and the preparation method thereof, belonging to the field of corrosion protection of metal materials. The organosilicon-modified corrosion inhibitor employs hydrogen-containing linear polydimethylsiloxane and indazole derivatives as basic raw materials and is prepared through reaction at certain temperature and under the action of a certain catalyst and other conditions. Compared with the prior art, the prepared organosilicon-modified corrosion inhibitor has higher application temperature and stronger adsorption and film-forming stability; a film formed by the macro-molecular corrosion inhibitor has better hydrophobicity and insulating properties, presents better protection effect, is lower in usage amount and has good continuous corrosion resistance; and the macro-molecular corrosion inhibitor is a novel high-efficiency surface corrosion inhibitor for metal.

Description

technical field [0001] The invention relates to a corrosion inhibitor and a preparation method thereof, in particular to an organosilicon-modified corrosion inhibitor capable of inhibiting the corrosion rate of a corrosive medium on the inner wall of a metal pipeline and a preparation method thereof, belonging to the field of metal corrosion protection. Background technique [0002] Corrosion inhibitor (also known as corrosion inhibitor) is a kind of anti-corrosion chemical, which is a chemical substance or a mixture of several chemical substances that exist in the environment in an appropriate concentration and form to prevent or slow down corrosion. With the continuous updating of its varieties and continuous improvement of quality, it has played an irreplaceable role in slowing down corrosion and prolonging the life of equipment, and has become one of the important anti-corrosion measures. Corrosion inhibitors have the characteristics of high selectivity, loss, pollution,...

Claims

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Application Information

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IPC IPC(8): C23F11/173
Inventor 孙鹏刘纾言王鑫
Owner CHINA PETROLEUM & CHEM CORP
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