新型咪唑啉酰胺缓蚀剂的合成及性能评价

针对高酸原油加工中分馏塔顶循环回流系统腐蚀加剧的现状,以油酸、二乙烯三胺和乙酸酐为原料合成了一种咪唑啉酰胺化合物缓蚀剂——油酸二乙烯三胺咪唑啉酰胺(EYP),并采用1HNMR和FTIR对其结构进行了表征,采用热重分析法对其热稳定性进行了考察。利用失重法考察了该缓蚀剂在模拟顶循油体系中的缓蚀性能,并与市售缓蚀剂进行性能对比,采用SEM对碳钢表面的腐蚀形貌进行分析。结果表明,EYP具有较好的热稳定性,在模拟顶循油体系中对A3碳钢具有优良的缓蚀性能,是一种稳定性好且高效的缓蚀剂。

Synthesis and Property Evaluation of New Imidazoline Amide Inhibitor

Abstract: Aiming at the phenomenon that the corrosion of overhead circulating reflux of fractionating tower aggravates in processing crude oil with high acid value, new imidazoline amide called EYP was synthesized from oleic acid, diethylene triamine and acetic anhydride. The synthesized compound was characterized by 1H-NMR and FT-IR and the thermostability was investigated by thermogravimetric analysis. The inhibition efficiency of EYP in simulated oil was evaluated by weight loss measurement in comparison with commercially available corrosion inhibitors. Besides, the corrosion morphology of mild steel surface was analyzed by SEM. The results showed that the structure of this compound was correct and that its thermal stability was also good. It had a good inhibition efficiency for A3 mild steel in simulative oil and was a new efficient corrosion inhibitor with high stability and low-cost.