CATALYTIC HYDROTHERMAL DEPOLYMERIZATION AND KINETICS OF NYLON 6
Depolymerization of nylon6 to ε-caprolactam with environmental-friendly heteropolyacid catalyst at temperatures between 553K and 603 K, under different pressures of 6.4-12.8 MPa in water medium. The products of depolymerization were analysed qualitatively and quantitatively by means of FT-IR, LC/MS and HPLC. The results indicated that the main depolymerized product was ε-caprolactam. Remnants solid product was undepolymerized nylon6 and the liquid products contained a little 6-aminocaproic acid and oligomer. The highest yield of ε-caprolactam was 77.96％ at 573K under 85min.Compared with no catalyst, the depolymerization rate and yield of ε-caprolactam was high under catalytic condition. Temperature and time also had important effect on depolymerization reaction. Catalytic depolymerization kinetic at different reaction conditions was studied,where the reaction activation energy was evaluated to be 77.38kJ/mol.
nylon6 heteropolyacid catalyst depolymerization reaction ε-caprolactam kinetics
Jinyang Chen Guiyang Liu Lujiang Jin Pei Ni Zhi Li Yi Xu Jianqiu Zhang,1Haibo He Junping Dong
School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China State Key Laboratory for Mineral Deposit Research,Institute of Geo-Fluid, School of Earth Science an School of Sciences, Shanghai University, Shanghai 200444,China
国际会议
成都
英文
255-259
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）