- Process for preparing (per)fluorohalogenethers
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A process for preparing (per)fluorohalogenethers containing the -SO2F group, having general formula (I):FSO2-R-CF2OCAF-CA' F2 wherein:A and A', equal to or different from each other, are Cl or Br;R has the following meanings: a (per)fluorinated, preferably perfluorinated, substituent, optionally containing one or more oxygen atoms; by reaction of carbonyl compounds having formula (II):FSO2-R-COF wherein R is as above; in liquid phase with elemental fluorine and with olefinic compounds having formula (III):CAF=CA'F wherein A and A'are as above, operating at temperatures from -120°C to -20°C, optionally in the presence of a solvent inert under the reaction conditions.
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Page column 6-7
(2008/06/13)
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