Method for purification of tetrafluoromethane and use thereof

Details Method for purification of tetrafluoromethane and use thereof Method for purification of tetrafluoromethane and use thereof

2005-11-22

2005-11-22

Price, Elvis O. (Department: 1621)

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

Organic compounds

Halogen containing

C570S161000, C570S164000, C570S170000, C570S177000

Reexamination Certificate

active

06967260

ABSTRACT:
Tetrafluoromethane containing ethylene compound, hydrocarbon compounds, carbon monoxide and/or carbon dioxide is contacted with zeolite having an average pore size of 3.4 to 11 Å and an Si/Al ratio of 1.5 or less and/or a carbonaceous adsorbent having an average pore size of 3.4 to 11 Å. Thus, high-purity tetrafluoromethane can be obtained which is advantageous in industry and provides good profitability.

REFERENCES:
patent: 3026359 (1962-03-01), Mastrangelo et al.
patent: 5417742 (1995-05-01), Tamhankar et al.
Patent Abstract of Japan , vol. 1996, No. 07, Jul. 31, 1996 & JP 08 081399 A (SHOWA DENKO KK), Mar. 26, 1996 cited in the application abstract.

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