Appeal No. 2006-1161
Application No. 10/322,254
1. A continuous or repeated–batch process for preparation of a compound
according to formula (I):
X-Rf-CF2-O-CF(CF3)COF (I)
wherein X- is FOC- or FSO2- and wherein -Rf- is a linear, branched or cyclic
fluoroalkene group containing 1-20 carbon atoms which is highly fluorinated and
which may incorporate ether and tertiary amine groups, comprising the steps of:
a) providing a mixture of:
X-Rf-COF (II)
wherein X- and -Rf- are as defined for formula (I), a fluoride salt, and
a polar solvent;
b) adding hexfluoropropylene oxide (HFPO) in an amount such that
X-Rf-COF remains in molar excess of HFPO by at least 10% and
reacting X-Rf-COF with HFPO;
c) separating unreacted X-Rf-COF from a mixture of addition products of
hexafluoropropylene oxide (HFPO) and X-Rf-COF;
d) repeating step a) using unreacted X-Rf-COF separated in step c).
11. A method of reacting hexafluoropropylene oxide (HFPO) with a
perfluoroacyl fluorides according to the formula:
X-Rf-COF (II)
wherein X is FOC- or FSO2- and wherein -Rf- is a linear, branched or cyclic
fluoroalkene group containing 1-20 carbon atoms which is highly fluorinated and
which may incorporate ether and tertiary amine groups,
to form a mixture of addition products comprising the monoaddition
product according to the formula:
X-Rf-CF2-O-CF(CF3)COF (I)
wherein the molar amount of said monoaddition product is 90% or greater
of the combined molar amount of said monoaddition product and a biaddition
product according to the formula:
2
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