曼尼希碱模拟常减压装置条件下缓蚀性能的研究

介绍了曼尼希碱的合成工艺和评价方法。确定了最佳合成工艺条件:醛胺酮摩尔比6∶6∶5,反应温度90℃,反应时间10 h。采用静态失重法,模拟用于炼油厂常减压装置介质条件下对碳20#的缓蚀效果,探讨了甲醛、芳香酮、有机胺为原料时摩尔比、反应温度和反应时间对缓蚀性能的影响。结果表明曼尼希碱在该环境下具有良好的缓蚀性能,说明曼尼希碱是一种良好的炼油缓蚀剂。当加入量达到80μL/L时,缓蚀率可达到90%以上。

Application of Mannich base in simulated atmospheric-vacuum distillation unit

The synthesis process of Mannich base and evaluation method is introduced.The optimized synthesis process conditions are determined to be: 6∶ 6∶ 5 of molar ratio of aldehyde,amines and ketone,90 ℃ reaction temperature and 10 hours of reaction time.According to the corrosion inhibition effect on C-20 steel in the simulated corrosion environment of atmospheric-vacuum distillation units,the impacts of molar ratio,reaction temperature,and reaction time on corrosion inhibition performance when formaldehyde,aromatic ketone and organic amine are used as feed are studied.The results show that,the Mannich base offers a good corrosion inhibition performance in the simulated corrosion environment and is a good corrosion inhibitor for petroleum refinery operation.When it is added at a dosage of 80 μL/L,the corrosion inhibition rate is over 90%.