A kind of silicon-based macromolecular composite corrosion inhibitor and preparation method thereof

A composite corrosion inhibitor and macromolecular technology, applied in the field of metal corrosion protection, can solve the problems of unstable film formation on the surface of metal internal components, weak temperature adaptability, etc., and achieve enhanced surface adsorption binding force, strong hydrophobicity and insulation , the effect of improving stability

Active Publication Date: 2018-04-10
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 with polysiloxane macromolecule as the main chain and grafted nitrogen heterocyclic compound with excellent thermal stability, excellent surface adsorption characteristics and stable anti-corrosion film structure and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 20g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 1.5g of 3-methyl-5-hydroxypyrazole with an average molecular weight of about 2000, and put them into a round-bottomed flask filled with 250mL of toluene In the process, continuously stir while raising the temperature to 85±5°C in a constant temperature water bath, 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 the reaction mixture is carried out Remove the solvent by distillation under reduced pressure, then inject 300mL of isopropanol into the flask, stir at a high speed and flow nitrogen gas at the same time, gradually add about 1.25g of 1-vinylpyrazole during the stirring process, and then raise the temperature to 75±5°C, the temperature After stabilization, add about 15 drops of 0.05mol / L isopropanol solution of chloroplatinic acid, fully react...

Embodiment 2

[0029] Take 25g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 2.0g of 3-methyl-5-hydroxypyrazole with an average molecular weight of about 2000, and add them to a round-bottomed flask filled with 200mL of toluene In the process, continuously stir while raising the temperature to 85±5°C in a constant temperature water bath, then add about 5g of 0.1mol / L sodium hydroxide solution dropwise with a dropper, the reaction process is carried out under nitrogen protection for 7 hours, and the reaction mixture is carried out Remove the solvent by distillation under reduced pressure, then inject 300mL of isopropanol into the flask, stir at a high speed and flow nitrogen gas at the same time, gradually add about 1.5g of 1-vinylpyrazole during the stirring process, and then raise the temperature to 75±5°C, the temperature After stabilization, add about 15 drops of 0.05mol / L isopropanol solution of chloroplatinic acid, fully react fo...

Embodiment 3

[0031]Take 20g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 1.5g of 3-methyl-5-hydroxypyrazole with an average molecular weight of about 2000, and put them into a round-bottomed flask filled with 300mL of toluene In the process, continuously stir while raising the temperature to 85±5°C in a constant temperature water bath, 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 the reaction mixture is carried out Remove the solvent by distillation under reduced pressure, then inject 350mL of isopropanol into the flask, stir at a high speed and flow nitrogen gas at the same time, gradually add about 1.2g of 1-vinylpyrazole during the stirring process, and then raise the temperature to 80±5°C, the temperature After stabilization, add about 20 drops of 0.05mol / L isopropanol solution of chloroplatinic acid, fully react f...

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Abstract

The invention relates to a silicon-based macromolecular composite corrosion inhibitor and a preparation method thereof, in particular to a silicon-based macromolecular composite corrosion inhibitor capable of reducing the corrosion rate of a metal surface and improving the corrosion resistance of an oil refinery, and a preparation method thereof. It belongs to the field of corrosion protection of metal materials. A silicon-based macromolecular composite corrosion inhibitor in the present invention is obtained by reacting hydrogen-containing linear polydimethylsiloxane and pyrazole derivatives under conditions such as a certain temperature and a catalyst. Compared with the existing technology, this product has a higher applicable temperature and stronger adsorption film formation stability, and the film formed has better hydrophobicity and insulation, better protection, low dosage, and good continuous corrosion resistance. A new and efficient metal surface corrosion inhibitor.

Description

technical field [0001] The invention relates to a corrosion inhibitor and a preparation method thereof, in particular to a silicon-based macromolecular composite corrosion inhibitor capable of suppressing the corrosion rate of the inner wall of a metal pipeline in a corrosive medium and a preparation method thereof, belonging to the field of metal corrosion protection. Background technique [0002] 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. As the varieties of corrosion inhibitors are continuously updated and the quality is continuously improved, they play an irreplaceable role in slowing down corrosion and prolonging the life of equipment. Corrosion inhibitors have become one of the important anti-corrosion measures. Corrosion inhibitors have the characteristics of high selectivity,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/10
Inventor 孙鹏王鑫刘纾言
Owner CHINA PETROLEUM & CHEM CORP
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