Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And group viii containing
Reexamination Certificate
2011-03-08
2011-03-08
Wood, Elizabeth D (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And group viii containing
C502S077000, C502S079000, C502S527240
Reexamination Certificate
active
07902107
ABSTRACT:
Provided is an emission treatment system and method for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system has an oxidation catalyst upstream of a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. Also provided is a method for disposing an SCR catalyst composition on a wall flow monolith that provides adequate catalyst loading, but does not result in unsuitable back pressures in the exhaust.
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Dettling Joseph C.
Patchett Joseph A.
Przybylski Elizabeth A.
BASF Corporation
Brown Melanie L.
Diehl Servilla LLC
Servilla Scott S.
Wood Elizabeth D
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