A kind of corrosion inhibitor composition and preparation method thereof

A composition and corrosion inhibitor technology, applied in the field of metal corrosion protection, can solve the problems of weak temperature adaptability and unstable film formation on the surface of metal internal components, so as to reduce steric hindrance, strengthen surface adsorption binding force and complexation The effect of chemical stability and high adsorption activity

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art and the problems in operation, in order to overcome the defects of weak temperature adaptability of the existing alkyl imidazoline and amides and other corrosion inhibitors, unstable film formation on the surface of some metal internal components, etc., the present invention provides a A preparation method of a corrosion inhibitor composition with good thermal stability, excellent surface film-forming properties and stability, and excellent insulating hydrophobicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 20g of hydrogen-containing polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 1000, put it into a round bottom flask filled with 400mL of toluene, stir continuously and raise the temperature to 75 in a constant temperature water bath. ±5°C, and flow nitrogen gas. After the dispersion is uniform, continue to heat up to 100±5°C. After the temperature is stable for 5 minutes, gradually add 1.5g of 4-hydroxybenzotriazole, and then drop about 3.5g of 0.1mol / L sodium hydroxide solution, fully reacted for 5 hours, the reaction mixture was distilled off under reduced pressure to remove the solvent, and then filtered to remove the insoluble matter to obtain the target product corrosion inhibitor composition. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.02%wt., and the product is qualified. Take hydrotreated kerosene a...

Embodiment 2

[0022] Take 20g of hydrogen-containing polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 750, add it to a round bottom flask filled with 400mL of toluene, and heat up to 75 in a constant temperature water bath while stirring continuously. ±5°C, and flow nitrogen gas. After the dispersion is uniform, continue to heat up to 100±5°C. After the temperature is stable for 5 minutes, gradually add 1.0g of 4-hydroxybenzotriazole, and then drop about 3.5g of 0.1mol / L sodium hydroxide solution, fully reacted for 5 hours, the reaction mixture was distilled off under reduced pressure to remove the solvent, and then filtered to remove the insoluble matter to obtain the target product corrosion inhibitor composition. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.02%wt., and the product is qualified. Take hydrotreated kerosene as a sol...

Embodiment 3

[0024] Take 15g of hydrogen-containing polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 750, add it to a round-bottomed flask filled with 400mL of toluene, and heat it up to 75 in a constant temperature water bath while stirring continuously. ±5°C, and flow nitrogen gas. After the dispersion is uniform, continue to heat up to 100±5°C. After the temperature is stable for 5 minutes, gradually add 1.5g of 4-hydroxybenzotriazole, and then drop about 5.0g of 0.1mol / L of sodium hydroxide solution, fully reacted for 8 hours, the reaction mixture was distilled off under reduced pressure to remove the solvent, and then filtered to remove insoluble matter to obtain the target product corrosion inhibitor composition. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.02%wt., and the product is qualified. Take hydrotreated kerosene as a...

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Abstract

The invention relates to a novel corrosion inhibitor composition and a preparation method thereof. The corrosion inhibitor composition comprises hydrogen-containing polydimethylsiloxane, a benzotriazole derivative, an alkaline catalyst and a solvent. The preparation method of the corrosion inhibitor composition comprises the following steps: under nitrogen protection and continuous stirring conditions, adding the hydrogen-containing polydimethylsiloxane into the solvent, heating up to 75-80 DEG C, continuing to heat up to 90-100 DEG C after the hydrogen-containing polydimethylsiloxane is dispersed uniformly, adding the benzotriazole derivative and the alkaline catalyst after the temperature is stable, fully reacting for 1-8 hours, removing the solvent from the reaction mixture, and filtering to obtain the product, namely the corrosion inhibitor composition. Compared with the prior art, the corrosion inhibitor product provided by the invention has a higher applicable temperature, stronger film forming stability, low use amount and good continuous corrosion resistance, and is a novel and efficient metal surface corrosion inhibitor.

Description

technical field [0001] The invention relates to a corrosion inhibitor composition and a preparation method thereof, in particular to a novel corrosion inhibitor composition capable of effectively inhibiting the surface corrosion of a metal member in contact with a flowing corrosive medium and a preparation method thereof, belonging to metal corrosion field of protection. Background technique [0002] In recent years, crude oil has gradually become heavier and inferior, while petroleum products are constantly required to be lighter and cleaner, which increases the difficulty of crude oil processing, and the corrosion problem in the production process is also particularly serious, especially in the refining process. Sexual substances pose a serious threat to production safety. Countries have always attached great importance to corrosion problems. As a kind of anti-corrosion chemical, corrosion inhibitor exists in the medium in appropriate concentration and form, which can pr...

Claims

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Application Information

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