Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Hydrogen component
Reexamination Certificate
2008-06-20
2009-02-03
Anthony, Joseph D (Department: 1796)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Hydrogen component
C252S181600, C252S181300, C252S182310
Reexamination Certificate
active
07485277
ABSTRACT:
A composition for removing hydrogen from an atmosphere, comprising a mixture of a polyphenyl ether and a hydrogenation catalyst, preferably a precious metal catalyst, and most preferably platinum, is disclosed. This composition is stable in the presence of oxygen, will not polymerize or degrade upon exposure to temperatures in excess of 200° C., or prolonged exposure to temperatures in the range of 100-300° C. Moreover, these novel hydrogen getter materials can be used to efficiently remove hydrogen from mixtures of hydrogen/inert gas (e.g., He, Ar, N2), hydrogen/ammonia atmospheres, such as may be encountered in heat exchangers, and hydrogen/carbon dioxide atmospheres. Water vapor and common atmospheric gases have no adverse effect on the ability of these getter materials to absorb hydrogen.
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Buffleben George M.
Shepodd Timothy J.
Anthony Joseph D
Nissen Donald A.
Sandia Corporation
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