Chemistry of inorganic compounds – Halogen or compound thereof – Elemental halogen
Reexamination Certificate
2005-10-18
2005-10-18
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Halogen or compound thereof
Elemental halogen
C423S503000, C423S504000, C436S124000
Reexamination Certificate
active
06955801
ABSTRACT:
A step (1) of heating a fluoronickel compound to release a fluorine gas, a step (2) of allowing a fluorine gas to be occluded into a fluorinated compound, and a step (3) of heating the fluoronickel compound and reducing an inner pressure are conducted in a container, respectively, at least once, and thereafter a high-purity fluorine gas is obtained in the step (1). Also, a step (5) of heating a fluoronickel compound and reducing an inner pressure and a step (6) of allowing a fluorine gas reduced in a hydrogen fluoride content to be occluded into the fluoronickel compound are conducted in a container having a fluorinated layer formed on its surface, respectively, at least once, the step (5) is further conducted, and thereafter a fluorine gas containing impurity gases is contacted with the fluoronickel compound to fix and remove the fluorine gas, and the impurities are analyzed by gas chromatography.
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Atobe Hitoshi
Hoshino Yasuyuki
Torisu Junichi
Hertzog Ardith E
Showa Denka K.K.
Silverman Stanley S.
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