An improved process for fluorinating chlorofluoro telomers, and particularly telomers of chlorotrifluoroethylene, is disclosed. The process of the present invention comprises reacting the crude telomer with a fluorinating agent in the presence of a catalytic amount of a fluorination catalyst. The fluorinating agent preferably comprises chlorine trifluoride (CIF3) and the fluorination catalyst comprises a transition metal halide selected from the group consisting of halides of iron, nickel, chromium, and mixtures thereof. The process is preferably conducted at a temperature in the range of from about 120°C to about 250°C and continues until the desired degree of fluorination is achieved.
本发明公开了一种用于
氟化
氯氟端聚物,特别是
氯三氟乙烯端聚物的改进工艺。本发明的工艺包括在
氟化催化剂的催化下,使粗端聚体与
氟化剂反应。
氟化剂最好由
三氟化氯(CIF3)组成,
氟化催化剂由过渡
金属卤化物组成,该
金属卤化物选自由
铁、
镍、
铬的卤化物及其混合物组成的组。该工艺最好在约 120°C 至约 250°C 的温度范围内进行,并持续到达到所需的
氟化程度。