Process for the preparation of fluoroalkyl perfluorovinyl ethers

摘要

A process for the preparation of fluoroalkyl ethers of the formula: <IMAGE> (I) wherein: Y is Br or F; X is F, Cl or Br or their mixtures when n is equal to or higher than 2; n is within the range of from 0 to 4; Rf represents a perfluoroalkylene radical containing from 1 to 8 carbon atoms. The process is characterized in that a fluoroalkoxy perfluoroacyl fluoride of the formula: <IMAGE> (II) is slowly heated with a salifying agent and a solvent, in the presence of a catalytic amount of N,N-dimethylformamide, with an end temperature within the range of from 60 DEG to 150 DEG C. being reached.