A process is disclosed for preparing an aromatic polyimide separation membrane which comprises fluorinating an aromatic polyimide membrane with active fluorine. The aromatic polyimide separation membrane thus prepared has high selectivity and gas permeability and is therefore useful as a membrane for separation of gas mixture or liquid mixtures.
本发明公开了一种制备芳香族聚
酰亚胺分离膜的工艺,该工艺包括用活性
氟氟化芳香族聚
酰亚胺膜。由此制备的芳香族聚
酰亚胺分离膜具有高选择性和气体渗透性,因此可用作气体混合物或液体混合物的分离膜。