In recent years, N-formylmorpholine( NFM) and its mixture are gradually used as solvent in industry to separate n-butene and butane by extractive distillation.

• 近年来,利用N-甲酰吗啉(NFM)及其混合溶剂萃取精馏分离正丁烯与丁烷的工艺逐渐得到工业应用。