Processes for the preparation of perfluoro compounds and derivatives thereof

摘要

Perfluoro compounds and perfluoro acid fluorides are efficiently prepared. Compounds of the general formula: ROCF(CF3)CF2OCO- CF(CF3)OR are each prepared by fluorinating a hydrogen- containing fluorine compound, e.g., ROCH(CH3)CH2OCOCF(CF3)OR in a liquid phase in the presence of a product of partial fluorination of the hydrogen-containing fluorine compound, e.g., ROCH(CF3)CF2OCOCF(CF3)OR or ROCF(CF3)CHFOCOCF(CF3)OR (wherein R and R are each a monovalent organic group; and R and R are each a monovalent perfluorinated organic group). Further, the compounds thus prepared can be converted into perfluoro acid fluorides via ester linkage cleavage, and the perfluoro acid fluorides can be further converted into perfluoro vinyl ethers via pyrolysis.