DESIGN AND ENHANCEMENT OF GREEN AND ENERGY-SAVING EXTRACTIVE DISTILLATION PROCESS

Abstract

Abstract: Extractive distillation is a separation technique for multi-component azeotropes by adding new solvents, which can effectively extract and separate the target substance in the mixture. However, traditional extractive distillation processes have drawbacks such as low separation efficiency, high energy consumption, and severe environmental pollution. With the depletion of energy and the increasing emphasis on environmental protection, energy-saving and efficient separation of azeotropes is of great significance for the development and design of chemical processes. It is urgent to design an energy-saving and efficient enhanced extractive distillation process. Firstly, the design route of extractive distillation process was summarized, andthe important position of thermodynamic topology theory in process design was pointed out. Secondly, the application of process strengthening in distillation process design was studied. Thirdly, the selection method of extractants in extractive distillation was pointed out, and the application of relative volatility and molecular simulation in it was explained in detail. Finally, the methods for optimizing and designing extractive distillation process parameters were introduced, and the advantages and disadvantages of sequential iterative optimization and multi-objective optimization were discussed. This study provideda new idea and method for the design and enhancement of green and energy-saving extractive distillation processes, and provided reference for research and application in related fields.

Key words: green and energy-saving, extractive distillation, separation of azeotropes, extraction agent screening, process enhancement

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