Abstract: The invention relates to a process for preparing perhaloethers from perhaloolefins and to a few "per se" new classes of perhaloethers thereby obtained.The process consists in reacting a perhalomonoolefin with a fluoroxy compound R.sub.x --OF (wherein R.sub.x represents a perhalogenated alkyl radical) at a temperature not exceeding 20.degree. C. in a liquid reaction medium and in the presence of inert gases.

Abstract: A process for preparing perhaloethers from perhaloolefins by reacting at least one fluorooxy compound R.sub.x --OF, wherein R.sub.x is a perhaloalkyl radical, with a perfluoroolefin in a liquid phase, optionally containing an organic solvent inert to the perfluoroolefin, while maintaining the temperature of the liquid phase in the range of -30.degree. to -120.degree. C. The process includes continuously feeding to the liquid phase a stream of an inert gas and a gaseous stream of the fluorooxy compound.

Abstract: Preparing fluorinated conjugated olefinic products having, among others, the formulae:R.sub.x O--(CF.dbd.CF).sub.m --F (A)R.sub.x O--(CF.dbd.CF).sub.m --OR.sub.x (B)F--(CF.dbd.CF).sub.m --F (C)andR.sub.y --(CF.dbd.CF).sub.m --F (D)wherein:R.sub.x and R.sub.y represent, among others, a perhalogenated alkyl radical containing from 1 to 10 carbon atoms in the case of R.sub.x and from 1 to 9 carbon atoms in the case of R.sub.y, andm is a numeral in the range of from 2 to 10.These olefinic products are obtained by reacting telomeric products having, among others, the formulae:R.sub.x O--(CFCl--CFCl).sub.m --FR.sub.x O--(CFCl--CFCkl).sub.m --OR.sub.xF--(CFCl--CFCl).sub.m --F, andR.sub.y --(CFCl--CFCl).sub.m --Fwith zinc powder, at temperatures within the range of from 40.degree. C. up to 160.degree. C., in an organic solvent selected from among alcohols, dimethylformide and dimethylsulfoxide. Many of these products, among which those corresponding to formulae (A), (B) and (D), are new.

Abstract: Preparing fluorinated conjugated olefinic products having, among others, the formulae:R.sub.x O--(CF.dbd.CF).sub.m --F (A)R.sub.x O--(CF.dbd.CF).sub.m --OR.sub.x (B)F--(CF.dbd.CF).sub.m --F (C), andR.sub.y --(CF.dbd.CF).sub.m --F (D)wherein:R.sub.x and R.sub.y represent, among others, a perhalogenated alkyl radical containing from 1 to 10 carbon atoms in the case of R.sub.x and from 1 to 9 carbon atoms in the case of R.sub.y, andm is a numeral in the range of from 2 to 10.These olefinic products are obtained by reacting telomeric products having, among others, the formulae:R.sub.x O--(CFCl--CFCl).sub.m --FR.sub.x O--(CFCl--CFCl).sub.m --OR.sub.xF--(CFCl--CFCl).sub.m --F, andR.sub.y --(CFCl--CFCl).sub.