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A kind of silicon-containing macromolecule corrosion inhibitor composition and preparation method thereof

A corrosion inhibitor and composition technology, applied in the field of corrosion inhibitor composition and its preparation, silicon-containing macromolecule corrosion inhibitor composition and its preparation field, can solve the problems of poor temperature adaptability and poor film formation on the surface of metal internal components Stability and other issues, to achieve the effect of reducing steric hindrance, improving electron donating ability, 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

[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

[0026] Take 20g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 2000 (active hydrogen content of about 0.5wt%) and 1.5g of 8-hydroxyquinoline, add them to a round bottom flask containing 250mL of toluene, and stir continuously At the same time, the temperature was raised to 105±5°C in a constant temperature water bath, and then about 5g of 0.1mol / L sodium hydroxide solution was added dropwise with a dropper. The reaction process was carried out for 5 hours under the protection of nitrogen, and the reaction mixture was distilled under reduced pressure to remove the solvent. Then inject 300mL of isopropanol into the flask, while stirring at high speed and flowing nitrogen, gradually add about 1.25g of 2-vinylquinoline during the stirring process, then increase the temperature to 75±5℃, add 0.05mol / after the temperature stabilizes About 15 drops of the ethanol solution of L chloroplatinic acid, fully reacted for 5 hours, the reaction mixture w...

Embodiment 2

[0028] 25g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 2000 (active hydrogen content of about 0.5wt%) and 1.25g of 8-hydroxyquinoline were added to a round-bottomed flask containing 250mL of toluene. In a constant temperature water bath, the temperature is raised to 100±5°C, and then about 5g of 0.1mol / L sodium hydroxide solution is added dropwise with a dropper. The reaction process is carried out for 8 hours under the protection of nitrogen. The reaction mixture is distilled under reduced pressure to remove the solvent, and then Inject 300mL of isopropanol into the flask, while stirring at high speed and flowing nitrogen, gradually add about 1.5g of 2-vinylquinoline during the stirring process, then increase the temperature to 75±5℃, add 0.05mol / L after the temperature stabilizes Approximately 10 drops of chloroplatinic acid ethanol solution were fully reacted for 3 hours, the reaction mixture was distilled under reduced pressure to re...

Embodiment 3

[0030] 20g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 1500 (active hydrogen content of about 0.5wt%) and 1.5g of 8-hydroxyquinoline were added to a round-bottomed flask containing 300mL of toluene, continuously stirring at the same time The temperature was raised to 100±5°C in a constant temperature water bath, and then about 3.5g of 0.1mol / L sodium hydroxide solution was added dropwise with a dropper. The reaction process was carried out for 6 hours under the protection of nitrogen, and the reaction mixture was subjected to vacuum distillation to remove the solvent. Then inject 300 mL of isopropanol into the flask, while stirring at high speed and flowing nitrogen, gradually add about 1.25g of 2-vinylquinoline during the stirring process, then increase the temperature to 70±5°C, add 0.05mol / after the temperature stabilizes About 10 drops of the ethanol solution of L chloroplatinic acid were fully reacted for 4 hours, the reaction mixt...

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Abstract

The invention relates to a siliceous macromolecular corrosion inhibitor composition and a preparation method thereof. The siliceous macromolecular corrosion inhibitor composition contains hydrogen-containing polydimethyl siloxane, hydroxyquinoline, vinylquinoline, a chloroplatinic acid ethanol solution, a basic catalyst, a solvent A and a solvent B. The preparation method of the siliceous macromolecular corrosion inhibitor composition comprises the steps: adding hydroxyquinoline and the solvent A into hydrogen-containing polydimethyl siloxane, then, adding the basic catalyst at the temperature of 85-110 DEG C, reacting, then, filtrating and distilling at reduced pressure, so as to obtain a primary product W; adding the solvent B and vinylquinoline into the W, heating to the temperature of 65-80 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 siliceous macromolecular 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 silicon-containing macromolecular corrosion inhibitor composition capable of inhibiting the corrosion rate of the inner wall of a metal pipeline of a corrosive medium and a preparation method thereof, and belongs to metal corrosion protection field. Background technique [0002] Corrosion inhibitor is an anti-corrosion chemical, a chemical substance or a mixture of several chemical substances that exists in the environment in an appropriate concentration and form to prevent or slow down corrosion. With the continuous update of the variety of corrosion inhibitors and the continuous improvement of their quality, they have played an irreplaceable role in slowing down corrosion and extending the life of equipment. Corrosion inhibitors have become one of the important anti-corrosion measures. Corrosion inhibitors have the characteristics of high selec...

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