Production and use of hexafluoroethane

Details Production and use of hexafluoroethane Production and use of hexafluoroethane

2006-05-16

2006-05-16

Keys, Rosalynd (Department: 1621)

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

Organic compounds

Halogen containing

C570S134000, C570S165000, C570S169000, C570S170000, C570S178000, C570S262000

Reexamination Certificate

active

07045668

ABSTRACT:
A process for production of high-purity hexafluoroethane, wherein a mixed gas containing hexafluoroethane and chlorotrifluoromethane is reacted with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst at 200-450° C., for fluorination of the chlorotrifluoromethane, or wherein pentafluoroethane containing chlorine compounds with 1-3 carbon atoms is reacted with hydrogen in a gas phase in the presence of a hydrogenation catalyst at 150-400° C., and the product is then reacted with fluorine in a gas phase in the presence of a diluent gas.

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XP-001120714, COQ, et al. “Conversion under hydrogen of dichlorodifluoromethane over bimetallic palladium catalysts” Applied Catalysis, A: General, vol. 101, 1993, pp. 41-50.
International Search Report, for PCT/JP02/08034, dated Nov. 27, 2002.

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