95-37-4Relevant academic research and scientific papers
Polyoxyethylene ether imidazoline sulfonate corrosion inhibitor and preparation method thereof
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Paragraph 0036-0038, (2021/03/24)
The invention discloses a polyoxyethylene ether imidazoline sulfonate corrosion inhibitor and a preparation method thereof. The structural formula of the corrosion inhibitor is shown in the specification, R represents the saturated alkyl group with the carbon chain number ranging from C11 to C17, the monoene group or the diene group, and n is an integer ranging from 5 to 15. According to the method, a long-carbon-chain imidazoline intermediate is synthesized from raw materials including long-carbon-chain carboxylic acid and diethylenetriamine firstly, then the long-carbon-chain imidazoline intermediate and ethylene oxide are subjected to the addition reaction under the alkaline condition, polyoxyethylene ether imidazoline is produced, the polyoxyethylene ether imidazoline and 3-chloro-2-sodium hydroxypropanesulfonate are subjected to the quaterisation reaction finally, and the corrosion inhibitor is prepared. Active groups, namely, -OH and -SO3 are introduced in the structure of thecorrosion inhibitor, so that the corrosion inhibitor has the good solubleness in water, the adsorption activity on the metal surface is greatly enhanced, and the excellent corrosion inhibition performance is shown; and the corrosion inhibitor is good in biological degradability, low in toxicity and environment-friendly. The corrosion inhibitor can be applied to oil-field-produced aqueous media containing CO2 and H2S and can be applied to high-temperature and high-pressure media of CO2 displacement systems for slowing down corrosion of fluids to carbon steel.
Preparation method of novel imidazoline alkyl guanidine corrosion-inhibition bactericide
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Paragraph 0035-0041, (2020/02/14)
The invention discloses a preparation method of a novel imidazoline alkyl guanidine corrosion-inhibition bactericide. The novel imidazoline alkyl guanidine corrosion-inhibition bactericide is characterized in that the preparation method of the novel imidazoline alkyl guanidine corrosion-inhibition bactericide comprises the following steps: preparing imidazoline alkyl guanidine; the method comprises the following steps: (1) adding a fatty acid, polyethylene polyamine and a water carrying agent into a four-neck flask provided with a water segregator and a condenser pipe; heating to 130-160 DEG C, reacting for 3-5 hours, continuously heating to 210-240 DEG C, reacting for 6-10 hours, and removing the excess water-carrying agent and unreacted polyethylene polyamine by using reduced pressure distillation to obtain a fatty acid-based imidazoline; (2) mixing the obtained fatty acid-based imidazoline with guanidine hydrochloride, heating to 150-200 DEG C, and keeping the temperature for 2-4 hours to obtain the novel imidazoline alkyl guanidine corrosion-inhibition bactericide.
Some imidazoline derivatives as corrosion inhibitors
Aiad, Ismail Abdelrhman,Hafiz,El-Awady,Habib
experimental part, p. 247 - 254 (2011/12/02)
In this study, cationic surfactants having different alkyl chain lengths were prepared by amidation of lauric, myristic, palmitic, stearic, oleic acids with diethylene triamine. The products were quaternized using chlo-roacetic acid. The chemical structure of the prepared compounds was elucidated using different spectroscopic techniques. The critical micelle concentration (CMC) and the free energy of the micellization and adsorption of these compounds were determined by surface tension and conductivity measurements. The products were evaluated as surface-active agents as well as corrosion inhibitors for steel alloy in 1 M hydrochloric and sulfuric acid, the results indicate that these materials have a high efficiency as corrosion inhibitors and as surface active agents. These results were correlated with the chemical structure of the prepared compounds. AOCS 2009.
