(817c) Modeling Investigation On Distillation Process Optimization of Benzene-Clohexene-Cyclohexane System By Using Aspen Plus

In this work, Aspen plus software was used to model and optimize distillation process of Benzene(BZ)-Clohexene(HE)-Cyclohexane(HA) system with Dimethylacetamide （DMAC）as extractant. The thermodynamic model used NTRL. The effect of important operation parameter (theoretical plate number, feed position, solvent ratio, reflux ratio, and extractant feed position and temperature) on products separation efficiency (recovery percentage of BZ, mass percentage of BZ, HE and HA) was modeled and investigated in BZ separation tower and recovery tower respectively. The modeling results indicated when distillation process was operated in following condition, the separation efficiency was best and energy consumption was the lowest.

1) In Benzene separation tower, the theoretical plates was 36, feed position of raw material on the 12^nd theoretical plates, solvent ratio 3.18, and reflux ratio 2.4; extractant feed position was on the 2 ^ndtheoretical plates and feed temperature was 64℃.

2) In recovery tower, the best operation condition was 26 theoretical plates, feed position 10^nd and reflux ratio 1.1.