Process for purifying pentafluoroethane, process for...

Details Process for purifying pentafluoroethane, process for... Process for purifying pentafluoroethane, process for...

2006-08-01

2006-08-01

Parsa, J. (Department: 1621)

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

Organic compounds

Halogen containing

C570S123000, C570S164000, C570S170000, C570S179000

Reexamination Certificate

active

07084316

ABSTRACT:
A process comprising bringing crude pentafluoroethane containing at least one compound selected from the group consisting of hydrofluorocarbons containing one carbon atom, hydrochlorofluorocarbons containing one carbon atom and hydrochlorocarbons containing one carbon atom, into contact with an adsorbent comprising a zeolite having an average pore size of 3 to 6 Å and a silica/aluminum ratio of 2.0 or less and/or a carbonaceous adsorbent having an average pore size of 3.5 to 6 Å, to reduce the content of the compound. The purified gas can be used as a low temperature refrigerant or an etching gas.

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Communication from foreign patent office dated Sep. 27, 2005.

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