申请人:AUSIMONT S.r.l.
公开号:EP0203466A2
公开(公告)日:1986-12-03
Process for the preparation of 2- perfluoropropoxy-perfluoropropionyl fluoride by dimerization of hexafluoropropene epoxide in aprotic polar medium, in the presence of N,N,N,'N'-tetrasub- stituted diaminodifluoromethane as catalyst, characterized in that the dimerization reaction is carried out in the presence of a co-catalyst constituted by a nitrogenous organic base having structure of aniline or of pyridine, or of a derivative thereof, wherein the nitrogen atom is not linked to hydrogen atoms and, in the case of the pyridine-type structure, it is sterically hindered by substituent groups on ortho- position relatively to it.
以 N,N,N,'N'-四亚硫基二氨基二氟甲烷为催化剂,在非丙极性介质中通过六氟丙烯环氧化物的二聚反应制备 2-全氟丙氧基-全氟丙酰氟的工艺、其特征在于,二聚反应是在由具有苯胺或吡啶结构的含氮有机碱或其衍生物构成的助催化剂存在下进行的,其中氮原子不与氢原子相连,在吡啶型结构的情况下,氮原子受其正位上的取代基团的立体阻碍。