Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2011-04-19
2011-04-19
Hardee, John R (Department: 1761)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
Reexamination Certificate
active
07928271
ABSTRACT:
A process for making CHF═CFCF3is disclosed. The process involves (a) reacting CCl2FCF2CF3with H2in the presence of a catalytically effective amount of hydrogenation catalyst to form CH2FCF2CF3; and (b) dehydrofluorinating CH2FCF2CF3from (a) to form CHF═CFCF3.Also disclosed are compositions including CCl3CF2CF3and HF, wherein the HF is present in an effective amount to form an azeotropic combination with the CCl3CF2CF3; and compositions including CCl2FCF2CF3and HF, wherein the HF is present in an effective amount to form an azeotropic combination with the CCl2FCF2CF3.
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E.I. Du Pont de Nemours and Company
Hardee John R
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