3010-23-9Relevant articles and documents
Metal corrosion inhibitor and preparation method thereof
-
Paragraph 0013, (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.
Gemini imidazoline quaternary ammonium salt as well as preparation method and application thereof
-
Paragraph 0048-0050, (2020/12/10)
The invention provides gemini imidazoline quaternary ammonium salt as well as a preparation method and application thereof, and relates to the technical field of imidazoline products. The gemini imidazoline quaternary ammonium salt provided by the invention has a structure as shown in a formula I in the specification. The gemini imidazoline quaternary ammonium salt provided by the invention is a new imidazoline product, is clear and transparent, has excellent corrosion inhibition and corrosion prevention effects, and can be used as a preservative or a corrosion inhibitor. The invention provides a preparation method of the gemini imidazoline quaternary ammonium salt. According to the invention, a monocyclic imidazoline intermediate is synthesized by adopting a method of combining a temperature programming method and a vacuum method, particularly, the reaction speed for synthesizing the monocyclic imidazoline intermediate is controlled by strictly controlling the molar ratio of oleic acid to diethylenetriamine, the temperature programming rate, the vacuum degree increasing rate and the reaction time, so that the monocyclic imidazoline intermediate meeting the industrial standard content of 98 +/-2% is obtained, and then the gemini imidazoline quaternary ammonium salt product with clear and transparent appearance is obtained.