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介绍了两种分离丁烷 /丁烯的方法 ,即乙腈 (ACN)法和二甲基甲酰胺 (DMF)法。对两种工艺流程进行了计算对比 ,DMF法工艺流程比ACN法简单 ,只需 3个塔。计算结果表明 ,DMF法再沸器和冷凝器能耗分别比ACN法降低 33.7%和 2 2 .7% ,选择DMF法萃取精馏分离丁烷 /丁烯效果较好。
Two methods for the separation of butane / butene are described, namely the acetonitrile (ACN) method and the dimethylformamide (DMF) method. Comparing the two processes, the DMF process is simpler than the ACN method, only three towers are needed. The calculation results show that the energy consumption of DMF reboiler and condenser are respectively 33.7% and 22.7% lower than that of ACN method, and DMF is the best method for the extractive distillation of butane / butene.