Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2011-06-21
2011-06-21
Puttlitz, Karl J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S263000
Reexamination Certificate
active
07964760
ABSTRACT:
This invention relates to a process for separating 1,1,2,2-tetrafluoroethane or 1,1,1,2-tetrafluoroethane from a mixture comprising both 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane wherein at least one ionic liquid is used to enhance the efficiency of the separation.
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Knapp Jeffrey P.
Shiflett Mark Brandon
Yokozeki Akimichi
E.I. Du Pont de Nemours and Company
Puttlitz Karl J
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