This paper studies mainly the application of UNIFAC group-contribution modelin simulating computation for the extractive distillatlon with C4-DMF system of a GPB plant.

• 较详细地介绍了UNIFAC汽液平衡模型在丁二烯抽提（GPB）装置的C4烃-DMF体系萃取精馏过程模拟计算中的应用情况。