尼龙6的催化水热解聚工艺与动力学  

Catalytic Hydrothermal Depolymerization and Kinetics of Nylon6

作　　者：金鹿江[1] 陈晋阳[1] 刘桂洋[1] 李志[1] 徐毅[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200444

出　　处：《高分子材料科学与工程》2010年第5期65-68,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20777048);上海市重点学科第二期(T105)资助项目

摘　　要：在553K-603K条件下,以水为反应介质,引入环境友好的杂多酸催化剂研究尼龙6的解聚反应,比较了催化和非催化条件对解聚的影响。对固体产物进行红外光谱和热失重分析,液相产物采用色谱-质谱联用仪和液相色谱定性与定量分析。结果表明,磷钨酸可提高尼龙6的解聚速率和ε-己内酰胺产率。解聚产物除ε-己内酰胺外,还含有少量的6-氨基己酸和低聚物。探讨了尼龙6的催化解聚动力学,求得解聚速率常数和反应活化能。Depolymerization of nylon6 to ε-caprolactam was carrid out with environmental-friendly heteropolyacid catalyst at temperatures between 553K and 603K,under different pressures of 6.4 MPa～12.8 MPa in water medium. The products of depolymerization were analysed qualitatively and quantitatively by means of infrared spectroscopy（FT-IR）,thermo gravimetric（TG）,liquid chromatography-mass spectrometry（LC/MS）and high performance liquid chromatography（HPLC）. The results indicate that the main depolymerized product is ε-caprolactam. Remnants solid product is undepolymerized nylon6 and the liquid products containe a little 6-aminocaproic acid and oligomer. The highest yield of ε-caprolactam is 77.96% at 583K under 85min.Compared with no catalyst,the depolymerization rate and yield of ε-caprolactam is high under catalytic condition. Temperature and time also have important effect on depolymerization reaction. Catalytic depolymerization kinetic at different reaction conditions was studied,where the reaction activation energy was evaluated to be 77.38 kJ/mol.

关 键 词：尼龙6 杂多酸催化剂 解聚反应 Ε-己内酰胺 动力学 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]