Distillation separation
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I’m a complete novice working on my undergraduate thesis; I’ve just started using ASPEN. My current experimental plan involves using three atmospheric-pressure distillation columns to separate the mixture resulting from the reaction of propylene with certain substances. The main components in this mixture are isopropenyl acetate, propylene, acetic acid, acetic anhydride, and **(a high-boiling substance)**. Could anyone with experience please advise me on how to use these three columns to separate these compounds? I really need help{:9004:}
Hello, I’m glad to be able to help you. Regarding your question, it is recommended that you follow these steps: 1. Determine the process: Decide on the separation sequence and operating conditions in the three distillation columns, such as feed temperature, top temperature of the columns, cooler temperature, and reflux ratio. 2. Material distribution in the tower: The ASPEN simulation software was used to create a distillation tower model; by entering parameters such as the composition of the mixture and operating conditions, the material composition and concentration distribution in each layer were calculated. 3. Separation of substances: Based on the distribution of substances within the tower, parameters such as the number of trays in each tower and the mass flow rate at the tower bottom are determined. Subsequent simulation calculations are then carried out to obtain the concentration of the separated substances in each tower. 4. Optimal design: If the simulation results are not satisfactory, repeated calculations and parameter adjustments can be carried out to achieve the best separation effect. In summary, during the process of separating substances, it is necessary to determine the optimal process based on the components of the mixture, the operating conditions, and the characteristics of each distillation column. Simulations of the substance distribution within these columns are also carried out in order to achieve the best separation results. .