Gas separation – Specific media material – Ceramic or sintered
Reexamination Certificate
2004-08-20
2009-06-23
Greene, Jason M (Department: 1797)
Gas separation
Specific media material
Ceramic or sintered
C055S282300, C055S385300, C055S524000, C055SDIG007, C055SDIG010, C055SDIG030, C060S303000, C060S311000, C264S628000, C264S630000, C264SDIG048, C428S116000
Reexamination Certificate
active
07550025
ABSTRACT:
Provided is a honeycomb filter which includes an aluminum titanate sintered product obtained by a process involving firing at a temperature of 1,250-1,700° C. a raw material mixture composed of: 100 wt. % of a first mixture having TiO2and Al2O3in a molar ratio of 40-60/60-40; and 1-10 wt. % of a second mixture composed of: an alkali feldspar according to the formula NayK1-yAlSi3O8, wherein 0≦y≦1; and a component selected from an oxide having a spinel structure composed of Mg and/or MgO, MgO and a precursor compound composed of Mg that is converted to MgO by firing, wherein the honeycomb filter exhibits excellent properties with respect to mechanical strength, thermal decomposition resistance, thermal shock resistance and thermal stability at high and fluctuating temperatures. Also provided is a method and an apparatus for cleaning an exhaust gas by removing solid particles predominantly containing carbon from the exhaust gas with the honeycomb filter. Also provided is a process for producing the honeycomb filter.
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Fukuda Masaaki
Fukuda Masahiro
Fukuda Tsutomu
Takahashi Masahide
Yoko Toshinobu
Greene Jason M
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ohcera Co. Ltd.
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