Study on optimized operation of precision distillation

Optimized operation of precision was studied systematically, and separation efficiency of tower was improved by changing reflux ratio. A new method called additional reflux batch distillation was put forward based on previous constant reflux ratio and total-reflux batch operation. Internal principles of the operation and major factors that affected optimization efficiency were also studied. The experimental results show that the concentration of feedstock, number of theoretic tray, time, and relative volatility of the system all affect the results because of severe back-mixing caused by them in tanks of the tower's top. Multilevel series-wound tanks can increase yield by 24% .largely improve the efficiency by partially preventing back-mixing of the liquid phase.