己内酰胺水解反应动力学研究

Study on reaction kinetics of caprolactam hydorlysis

2,4,6-三(氨基己酸基)-1,3,5-三嗪是一种性能优异的水性缓蚀剂与防锈剂,己内酰胺水解反应是其合成工艺中的重要一步。通过对己内酰胺水解过程的研究,考察了反应温度、氢氧化钠加入量等因素对反应的影响。结果表明:己内酰胺水解过程的产率在99%以上,副反应可忽略不计;升高反应温度能显著加快反应速率,对反应选择性几乎没有影响;增加氢氧化钠加入量,能显著加快己内酰胺消耗速率和降低残余己内酰胺质量摩尔浓度;己内酰胺的水解过程符合二级反应动力学规律,己内酰胺和氢氧化钠的反应级数均为1,反应活化能为55.31 kJ/mol。研究结果为己内酰胺水解过程的模拟和优化奠定了基础。

The caprolactam hydorlysis process is a key step for the synthesis of 2,4,6-tris(aminohexyl)-1,3,5-triazine,which is a kind of aqueous corrosion inhibitor and antirusting agent with excellent properties.Influence of temperature and amount of sodium hydroxide addition on the hydorlysis reaction was investigated and the reaction kinetics model was proposed.Reaction selectivity is higher than 99%,and the temperature influence on reaction selectivity is insignificant.The hydorlysis rate of caprolactam consumption increases with the increasing of temperature.The increase of sodium hydroxide addition could increase hydorlysis rate and decrease the mass molar concentration of remaining caprolactam significantly.The hydorlysis process coincides with the second-order reaction,for which the reaction order of caprolactam and sodium hydroxide is 1,and the activation energy is 55.31 kJ/mol.The study lays foundation for simulation and optimization of the hydorlysis process.