Process simulation optimization of caprolactam polymerization

摘要

The process for the hydrolytic polymerization of caprolactam (CL) is analyzed by Aspen Plus software. Under the condition of 34t/d output, the influences of main parameters, such as feed flux, polymerization temperature of polymer tower, on the results of polymerization are presented. Results show that the increase of back section temperature of the tower should be avoided. Front section temperature should be lower when the daily output is lower, which can reduce the energy-consuming and the cooling load of back section of tower, and a higher front section temperature and a lower back section temperature are needed when molecular weight is no less than 20000, to ensure that extractable substance lower than 8.3%.