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A nitrogen-heterocyclic modified polysiloxane corrosion inhibitor composition and its preparation method

A polysiloxane 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 and binding force, The effect of improving the ability to give electrons

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

[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

[0025] Take 20 g of hydrogen-containing polydimethylsiloxane (with an active hydrogen content of about 0.5 wt%) and 1.5 g of 4-hydroxycarbazole with an average molecular weight of about 1000, and add them to a round-bottomed flask filled with 250 mL of isopropanol, continuously Stir constantly while raising the temperature to 75±5°C in a constant temperature water bath, then dropwise add about 5g of 0.1mol / L sodium hydroxide solution with a dropper, the reaction process is carried out under nitrogen protection for 5 hours, and the reaction mixture is removed by vacuum distillation Solvent, then inject 300mL xylene into the flask at 65±5°C, add about 15 drops of 0.05mol / L chloroplatinic acid isopropanol solution after the temperature is stable, stir at a high speed and flow nitrogen at the same time, and then raise the temperature to 105 ±5°C, gradually add about 1.25g of N-vinylcarbazole during stirring, fully react for 3.5 hours, distill the reaction mixture under reduced pres...

Embodiment 2

[0027] Take 25g of hydrogen-containing polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 1.5g of 4-hydroxycarbazole with an average molecular weight of about 800, and add them to a round-bottomed flask filled with 250mL of isopropanol, continuously Stir constantly while raising the temperature to 80±5°C in a constant temperature water bath, then drop about 5g of 0.1mol / L sodium hydroxide solution with a dropper, the reaction process is carried out under nitrogen protection for 6 hours, and the reaction mixture is subjected to vacuum distillation Remove the solvent, then inject 300mL xylene into the flask at 65±5°C, add about 10 drops of 0.05mol / L chloroplatinic acid isopropanol solution after the temperature stabilizes, stir at a high speed and flow nitrogen at the same time, and then raise the temperature to 115±5°C, gradually add about 1.25g of N-vinylcarbazole during stirring, fully react for 3.5 hours, distill the reaction mixture under reduced pres...

Embodiment 3

[0029]Take 20 g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 800 (the active hydrogen content is about 0.5 wt%) and 1.25 g of 4-hydroxycarbazole, add them to a round-bottomed flask filled with 250 mL of isopropanol, and continuously While stirring continuously, raise the temperature to 75±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 5 hours, and the reaction mixture is distilled under reduced pressure Remove the solvent, then inject 300mL xylene into the flask under the condition of 65±5°C, add about 15 drops of 0.05mol / L chloroplatinic acid isopropanol solution after the temperature is stable, stir at a high speed and flow nitrogen at the same time, and then raise the temperature to 105±5°C, gradually add about 1.25g of N-vinylcarbazole during stirring, fully react for 2.5 hours, distill the rea...

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Abstract

The invention relates to an azacyclo-modified polysiloxane corrosion inhibitor composition and a preparation method thereof. The corrosion inhibitor composition contains hydrogen-containing polydimethyl siloxane, hydroxy carbazole, vinylcarbazole, a chloroplatinic acid ethanol solution, a basic catalyst, a solvent A and a solvent B. The preparation method of the azacyclo-modified polysiloxane corrosion inhibitor composition comprises the steps: adding hydroxy carbazole and the solvent A into hydrogen-containing polydimethyl siloxane, then, adding the basic catalyst at the temperature of 75-90 DEG C, reacting, then, filtrating and distilling at reduced pressure, so as to obtain a primary product W; adding the solvent B and vinylcarbazole into the W, heating to the temperature of 90-140 DEG C, then, dropwise adding the chloroplatinic acid ethanol solution, reacting to obtain a mixture, filtrating the mixture, and removing the solvent, thereby obtaining the corrosion inhibitor composition. According to the azacyclo-modified polysiloxane corrosion inhibitor composition and the preparation method thereof, the product has higher applicable temperature and stronger adsorbing and film forming stability, a formed film is better in hydrophobicity and insulativity, the protective action is better, the consumption is low, and the sustained corrosion resistance is good.

Description

technical field [0001] The invention relates to a corrosion inhibitor composition and a preparation method thereof, in particular to a nitrogen heterocyclic group-modified polysiloxane corrosion inhibitor composition capable of inhibiting the corrosion rate of the inner wall of a metal pipeline in a corrosive medium and The preparation method belongs 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 characteri...

Claims

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Application Information

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