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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Main Authors | , |
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Format | Patent |
Language | English French German |
Published |
08.06.2005
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: EP20040001633 |