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US 12,496,574 B2Granted
Rare-earth phosphate alumina composite for use in emission control catalysts and method for making the same
OwnerThomas Harmening, Marcos Schoneborn +1inventors
InventorsThomas Harmening, Marcos Schoneborn, Johanna Fabian
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Abstract
The present invention relates to a composition for use in a catalyst system in emission control systems comprising a transition alumina based material and rare earth phosphates and to a method for making same.
Claims9
A composition for use as a support in a catalyst system comprising:
- i) a transition alumina;
- and
- ii) a rare-earth phosphate consisting of LaPO4, YPO4, NdPO4, or mixtures thereof, crystallites of the rare-earth phosphate being dispersed in a matrix of the transition alumina, the dispersed crystallites of the rare earth phosphate being characterized by having a crystallite size that is lower than 50 nm after calcination at 1000° C. for 3 hours.
Dependencies are inferred from the claim text.