新型咪唑啉季铵盐缓蚀剂合成工艺研究与性能评价

以油酸和二乙烯三胺为原料，氧化钙为脱水剂，氯化苄为季铵化试剂，合成了新型咪唑啉季铵盐缓蚀剂。合成工艺条件为：油酸0．05mol，二乙烯三胺0．06mol，氧化钙0．1mol，在80℃下酰胺化2h，升温至160℃环化反应6h，加入氯化苄0．06mol，在55℃季铵化反应2．5h。结果表明，与现有甲苯为挟水剂工艺比较，该工艺酰胺化及环化反应温度低，咪唑啉成环性能及缓蚀效果好；N80钢片在25℃下HCl浓度0．5mol／L，缓蚀剂浓度200mg／L的溶液中，缓蚀率高达85．6％。

Research on synthesis and performance evaluation of new imidazoline quaternary ammonium salt inhibitor

A new imidazoline quaternary ammonium salt was amine, benzyl chloride as quaternary reagent and CaO as dehy that it was produced by the amidation reaction at 80℃ for 2 synthesized drating agent. The h with oleic acid oleic acid, diethylenetri- technics conditions were 0.05 tool, diethylenetri- amine 0.06 mol and CaO 0.1 mol. Then the cyclization reaction was at 160℃ for 6 h. Quaternarization was carried out with benzyl chloride 0.06 mol at 55℃ for 2.5 h. The results showed that the product with calcium oxide as the dehydrating agent was synthesized at a lower temperature for amidation reaction and cyclization reaction and had a better inhibitive efficiency than the process existed with methyLbenzene as dehydrating agent. The inhibiting efficiency of N80 steel reached 85.6% in solution of HC1 0.5 mol/L and corrosion inhibitor 200 mg/L at 25℃.