Simulation of ethylene glycol distillation process
Feng Shi · Natural Gas Chemical Industry · 2011
The ethanol column,mid-boiling point byproducts column and ethylene glycol column of the three-column separation process for the product from ethylene glycol production by hydrogenation of diethyl oxalate were simulated by the software PRO/II,and NRTL thermodynamic model was selected for the simulation calculation of all of the three columns.The thermodynamic parameters were modified,and the numbers of theoretical plates,feed stages and reflux ratios were calculated and adjusted to get the optimal results for all of the three columns.The simulated results demonstrate that the three-column separation process is feasible and flexible and can obtain an ethylene glycol product which meets the quality requirement,and give a prediction on the requirement in industrial production of ethylene glycol to some extent.