Catalyzed soot filter
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United States of America Patent
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Oct 21, 2008
Grant Date -
Jan 26, 2006
app pub date -
Jul 26, 2005
filing date -
Jul 26, 2004
priority date (Note) -
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Abstract
An improved catalyzed soot filter is comprised of a porous ceramic having, on at least a portion of the porous ceramic, an amorphous catalytic phase comprised of an alkali containing oxide glass having therein Si, Al or combination thereof. The improved catalyzed soot filter may be formed by contacting a porous ceramic such as mullite, silcon carbide or cordierite with an alkali containing compound that is a silicate, aluminate or alumino-siliicate and heating to a temperature sufficient to form an amorphous catalytic phase fused to at least a portion of the porous ceramic.
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