【摘要】 研究了尼龙6在亚超临界水中的解聚反应,以期为废旧尼龙6的回收利用提供技术参数。实验分别利用气质联用仪和紫外分光光度计对解聚后的液相产物进行定性和定量分析,并考察了不同的反应温度、反应压力和反应时间对液相产物收率的影响。结果表明,液相产物绝大部分为己内酰胺;解聚的最佳条件为370℃、25MPa、60min;己内酰胺最大收率为96%。通过动力学分析和Arrhenius关系计算,得出尼龙6亚超临界水解聚的活化能为64.4kJ/mol。更多还原

【Abstract】 The depolymerization of waste nylon 6 in subcritical and supercritical water was investigated.GC-MS,ultraviolet spectrometry were used to analyze the products in liquid qualitatively and quantitatively.The influences of temperature,pressure,and reaction time on the yield of the products were studied.The results showed that the main products in liquid were caprolactam,and the optimized conditions of the reaction were found to be 370 ℃,25 MPa,60 min of reaction times,with the maximum recovery of 96%.An active energy of 64.4 kJ/mol was calculated according to Arrhenius relationship and the kinetic analysis.更多还原