Process for preparing fluorohalogenethers

A process for preparing (per)fluorohalogenethers having general formula (II): R'CF2OCFA-CA'F2 wherein: A and A', equal to or different from each other, are H, Cl or Br but they cannot be both H; R' has the following meanings: RO-, wherein R is a (per)fluorinated substituent, sele...

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Bibliographic Details
Main Authors TORTELLI, VITO, CALINI, PIERANGELO
Format Patent
LanguageEnglish
French
German
Published 08.06.2005
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A process for preparing (per)fluorohalogenethers having general formula (II): R'CF2OCFA-CA'F2 wherein: A and A', equal to or different from each other, are H, Cl or Br but they cannot be both H; R' has the following meanings: RO-, wherein R is a (per)fluorinated substituent, selected from the following groups: linear or branched C1-C20 alkyl; C3-C7 cycloalkyl; aromatic, C6-C10 arylalkyl or alkylaryl; C5-C10 heterocyclic or alkylheterocyclic; or a perfluoropolyether substituent T-Rf- wherein T = -OCF2OCFA-CA'F2, -OCF2XI, wherein XI = F, CF3, Cl; Rf is a perfluorooxyalkylene chain; by reaction of carbonyl compounds having formula R"COF (III) wherein R" = RO-, or R" = Q-Rf- wherein Q = -OCOF, -OCF2XI; in liquid phase with elemental fluorine and with olefinic compounds having formula CAF=CA'F (IV), at temperatures from - 120 DEG C to -20 DEG C.
Bibliography:Application Number: EP20040001633