咪唑啉类缓蚀剂合成及缓蚀性能评价

Synthesis and inhibition performance evaluation of the corrosion inhibitor of imidazoline quaternary

合成了一种具有较好耐温和耐酸性能的咪唑啉季铵盐缓蚀剂,其最佳合成条件为:油酸、二乙烯三胺最佳配比为1∶1.2,酰化温度为160℃,酰化时间为3 h,环化温度为220℃,环化时间为4 h,季铵化试剂氯化苄,咪唑啉中间体与氯化苄的最佳摩尔比为1∶1.2,季铵化反应温度为60℃,季铵化反应时间为3 h。当缓蚀剂的加量为0.5%(质量分数),酸化温度为80℃,酸化时间为4 h,酸液浓度为15%时,缓蚀率可以达到99.1%以上。

An more thermostable and acid-resistance imidazolium quaternary corrosion inhibitor was syn- thesized. The optimal synthesis condition were as follows：the molar ratio of oleic acid to diethylenetri- amine was 1： 1.2, acylation reaction temperature was 160℃, acylation time was 3 h ;eyclization reaction temperature was 220 ℃, cyclization time was 4 h;benzyl chloride was selected as quatemization reagent and the molar ratio of benzyl chloride to imidazoline intermediate was 1.2： 1, quaterizafion temperature was 60℃ ,reaction time was 3 h. In 15% hydrochloric acid, when the mass fraction of the inhibitor was 0.5% ,the corrosion rate was 99.1% ,with acidification temperature 80 ℃ and time 4 h.