Catalyzed soot filter and method(s) to make these

Details Catalyzed soot filter and method(s) to make these Catalyzed soot filter and method(s) to make these

2011-04-19

2011-04-19

Hailey, Patricia L (Department: 1732)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

C055S282200, C055S282300, C055S385300, C055S523000, C055S524000, C055SDIG007, C055SDIG010, C055SDIG030, C095S273000, C095S278000, C060S297000, C060S299000, C060S301000, C060S311000, C423S213200, C423S213500

Reexamination Certificate

active

07928032

ABSTRACT:
An improved soot catalyst is comprised of an alkali compound at least partially coated by a ceramic coating comprised of C bonded to a metal, semimetallic element or combination thereof. The improved soot catalyst may be employed in catalyzed Diesel particulate filters. In one method to make a catalyzed Diesel particulate filter, the improved filter is made by contacting a porous ceramic body having an alkali catalyst thereon, coating the alkali catalyst with an organic ceramic precursor, heating the ceramic body to a temperature in an atmosphere sufficient to decompose the organic ceramic precursor to form the soot catalyst on the porous ceramic body without volatilizing substantial amount of the alkali catalyst away.

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