Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2005-08-09
2005-08-09
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C423S626000, C423S627000, C423S628000, C502S304000, C502S325000, C502S336000, C502S340000, C502S349000, C502S350000, C502S406000, C502S415000
Reexamination Certificate
active
06926875
ABSTRACT:
Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meson-pore region, sharp pore size distribution, and at least a part of the pores being connected three-dimensionally to form a three-dimensional network structure with random passages, the porous material preferably being of alumina and having a spongy structure or the porous material preferably being an aggregate of particles having an aspect ratio of 3 or less; a process of producing the porous material which includes a step of aging a system capable of becoming an oxide on thermal decomposition; a catalyst for exhaust gas purification having excellent NOxremoval performance, high resistance against sulfur poisoning, and satisfactory high-temperature durability which comprises the porous material as a carrier having supported thereon a noble metal and an NOxstorage component; and a method of exhaust gas purification using the catalyst.
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Akimoto Yusuke
Hatanaka Miho
Suda Akihiko
Takahashi Naoki
Tanaka Toshiyuki
Kabushiki Kaisha Toyota Chuo Kenkyusho
Medina Maribel
Silverman Stanley S.
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