Energy Savings in Flowsheets based on Combination of Distillation and Splitting Processes

Abstract

The relationship between structures of ternary systems phase diagram, separation flowsheets including distillation columns and decanters and their energy consumption are discussed. Phase equilibrium diagrams of two ternary systems cyclohexanol + cyclohexanone + water and propanol-1 + cyclohexane + acetonitrile were studied. A number of isomeric flowsheets were proposed for separation of the first ternary mixture and the influence of devices (columns and decanters) arrangement on the flowsheets energy consumption were shown. The influence of separation conditions in a distillation column (the ratio of distillate and bottom flows) on the energy consumption of separation flowsheet were demonstrated on the example system propanol-1 + cyclohexane + acetonitrile.