6528-88-7Relevant articles and documents
Metal corrosion inhibitor and preparation method thereof
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Paragraph 0014, (2021/02/10)
The invention discloses a metal corrosion inhibitor and a preparation method thereof. The preparation method comprises the process steps of a natural gas storage CO2 liquid-phase corrosion inhibitor and a natural gas storage CO2 gas-phase corrosion inhibitor. The preparation method of the CO2 liquid-phase corrosion inhibitor for the natural gas storage comprises the following steps: S1, carrying out amidation and cyclization reaction on cis-octadecenoic acid-9-enoic acid and triethylenetetramine serving as main components, and dehydrating twice to form a five-membered heterocyclic imidazolineintermediate; s2, the imidazoline intermediate and benzyl chloride are subjected to quaternization, and oil solubility is converted into water-soluble imidazoline quaternary ammonium salt; and S3, reacting the imidazoline quaternary ammonium salt with ethyl sulfur nitrogen, and introducing an ethyl sulfur nitrogen polar group, so that the imidazoline quaternary ammonium salt has more active adsorption sites to obtain the natural gas storage CO2 liquid-phase corrosion inhibitor 2-ethylthio-amino-ethyl-benzyl-1-heptadecenyl-imidazoline quaternary ammonium salt. The corrosion inhibitor has gas-phase corrosion inhibition and liquid-phase corrosion inhibition functions at the same time, and the use concentration of the corrosion inhibitor can be reduced to a low degree on the premise that the function of the corrosion inhibitor is not affected.