METHOD OF MANUFACTURE OF FLUORINATED OLEFINS

摘要

Disclosed is a process for the preparation of internal dihydrofluoroolefins of the formula RCH=CHC<SUB>2</SUB>F<SUB>5</SUB>, comprising reacting a fluorinated olefin of the formula RCH=CHF, wherein R is selected from perfluoroalkyl groups having from one to ten carbon atoms, and the said alkyl group is either an n-alkyl chain, a sec-alkyl chain, or an iso-alkyl chain, in the liquid phase with tetrafluoroethylene, in the presence of a Lewis acid catalyst, removing the Lewis acid catalyst and isolating the dihydrofluoroolefin. Additionally provided is a method for the addition of terminal fluorinated olefins to tetrafluoroethylene.