关键词: 2-甲基吡啶, 水, 环己烷, 共沸精馏, 模拟

Abstract: Azeotropic distillation was used to separate 2-methylpyridine and water azeotropic mixture. First,cyclohexane was chosen as the azeotropic entrainer. Second,Aspen Plus were used to simulate the continuous azotropic distillation process. The effects of entrainer flow rate and output quantity at the bottom and feed location on the product purity and heat duty were analyzed to get the optimal operation parameters. The result indicated that when the theoretical stage number was 21,the entrainer flow rate was 3600kg/h,the output quantity at the bottom was 888kg/h,and the feed location was 15,the purity of 2-methylpyridine and water can achieve as 99.54% and 99.97%,respectively. Finally,in order to investigate the effectiveness of the solvent,the batch azeotropic distillation experiments were carried out. The results showed that the purity of 2-methylpyridine and water can achieve as 99.85% and 99.96%,respectively,which revealed that cyclohexane was an ideal azeotropic agent and the azeotropic distillation was useful in the separation of 2-methylpyridine and water system.

Key words: 2-methylpyridine, water, cyclohexane, azeotropic distillation, simulation