变压精馏分离甲醇与碳酸二甲酯工艺流程的模拟

Simulation of Separation of Methanol and Dimethyl Carbonate by Pressure Distillation

甲醇(Me OH)与碳酸二甲酯(DMC)会形成共沸混合物,它们的共沸组成会随着压强变化,变压精馏是分离共沸混合物的其中一种有效方法。选择Wilson模型作为热力学模型,回归了该热力学模型中的交互作用参数,然后用Aspen Plus对变压精馏分离甲醇与碳酸二甲酯工艺流程进行了模拟与优化。通过该分离流程可以实现甲醇与碳酸二甲酯的分离,所得碳酸二甲酯的质量分数达到99.5%,甲醇的质量分数达到99.9%。

Methanol（Me OH）and dimethyl carbonate（DMC）form an azeotropic mixture,and their azeotropic composition changes with pressure.Transformer distillation is one of the effective methods for separating azeotrope.The Wilson model was chosen as the thermodynamic model to analyze the interaction parameters in the thermodynamic model.Then,the process flow from methanol and dimethyl carbonate was simulated and optimized by Aspen Plus.The separation of methanol and dimethyl carbonate can be achieved through the separation process,the mass fraction of dimethyl carbonate reached 99.5%,and the mass fraction of methanol reached 99.9%.