Process for preparing fluorohalogenethers

Details Process for preparing fluorohalogenethers Process for preparing fluorohalogenethers

2006-03-28

2006-03-28

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S607000, C568S610000, C568S625000

Reexamination Certificate

active

07019177

ABSTRACT:
A process for preparing (per)fluorohalogenethers having general formula (II):in-line-formulae description="In-line Formulae" end="lead"?R′CF2OCFA-CA′F2  (II)in-line-formulae description="In-line Formulae" end="tail"?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–C20alkyl; C3–C7cycloalkyl; aromatic, C6–C10arylalkyl or alkylaryl; C5–C10heterocyclic or alkylheterocyclic; or a perfluoropolyether substituent T-Rf— wherein T=—OCF2OCFA-CA′F2, —OCF2XI, wherein XI=F, CF3, Cl; Rfis 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° C. to −20° C.

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