Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2006-07-04
2006-07-04
Richter, Johann (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S123000, C570S161000, C570S163000, C570S164000, C570S165000, C570S166000, C570S167000, C570S168000
Reexamination Certificate
active
07071368
ABSTRACT:
A process for producing 1,1,1-trifluoroethane (HFC-143a) which process comprises reacting hydrogen fluoride with vinylidene chloride along with one or more of 1,1,-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane (HCFC-142b) and 1,1,1-trichloroethane (HCC-140a) in the presence of pentavalent antimony as a fluorination catalyst under conditions to produce 1,1,1-trifluoroethane (HFC-143a), generally in yields of 90% or more.
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Johnson Robert C.
Merkel Daniel C.
Tung Hsueh Sung
Honeywell International , Inc.
Nwaonicha Chukwuma
Richter Johann
Szuch Colleen D.
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