Novel macro-molecular corrosion inhibitor and preparation method thereof

A corrosion inhibitor and macromolecular technology, applied in the field of new macromolecular corrosion inhibitor and its preparation, corrosion inhibitor and its preparation, can solve the problems of weak temperature adaptability, unstable film formation on the surface of metal internal components, etc., to achieve Strong hydrophobicity and insulation, enhanced surface adsorption and binding force, and stable chemical structure

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 A new type of macromolecular corrosion inhibitor with polysiloxane macromolecules as the main chain and grafted heterocyclic compounds 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

[0021] Take 20g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 1.5g of 5-hydroxybenzothiazole with an average molecular weight of about 2500, and add them to a round-bottomed flask filled with 250mL of isopropanol , continuously stirring while raising the temperature to 75±5°C in a constant temperature water bath, then dropwise add about 4g of 0.1mol / L sodium hydroxide solution with a dropper, the reaction process is carried out under nitrogen protection for 7 hours, and the reaction mixture is decompressed After the solvent is distilled off, the insoluble matter is filtered off, and the target product, a novel macromolecular corrosion inhibitor, is obtained. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. Take hydrotreated kerosene as a solvent, and make a 1% kerosene solution of th...

Embodiment 2

[0023] Take 25g of hydrogen-containing linear polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 2.0g of 5-hydroxybenzothiazole with an average molecular weight of about 2500, and add them to a round-bottomed flask filled with 250mL of isopropanol , continuously stirring while raising the temperature to 75±5°C in a constant temperature water bath, then dropwise add about 4g of 0.1mol / L sodium hydroxide solution with a dropper, the reaction process is carried out under nitrogen protection for 7 hours, and the reaction mixture is decompressed After the solvent is distilled off, the insoluble matter is filtered off, and the target product, a novel macromolecular corrosion inhibitor, is obtained. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. Take hydrotreated kerosene as a solvent, and make a 1% kerosene solution of th...

Embodiment 3

[0025] Take 30g of hydrogen-containing linear polydimethylsiloxane with an average molecular weight of about 3500 (active hydrogen content is about 0.5wt%) and 1.5g each of 5-hydroxybenzothiazole and 2-hydroxybenzothiazole, and add to a 350mL In a round-bottomed flask of isopropanol, stir continuously while raising the temperature to 75±5°C in a constant temperature water bath, then add about 4g of 0.1mol / L sodium hydroxide solution dropwise with a dropper, and the reaction process is carried out under the protection of nitrogen After 7 hours, the reaction mixture was distilled off under reduced pressure to remove the solvent, and then the insoluble matter was filtered to obtain the target product, a novel macromolecular corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. Take hydrotreated kerosene as a solvent, and make a ...

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Abstract

The invention relates to a novel macro-molecular corrosion inhibitor and a preparation method thereof, especially to the novel macro-molecular 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 novel macro-molecular corrosion inhibitor employs hydrogen-containing linear polydimethylsiloxane and benzothiazole 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 macro-molecular 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 a novel macromolecular 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, loss, pollution, ...

Claims

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Application Information

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