Back to results
US 12,201,966 B2Granted
Catalyst for treating exhaust gas
AssigneeJohnson Matthey Public Limited Company
InventorsDaniel Robert Avis, Alexander Nicholas Michael Green, Matthew Eben Harris, Oliver Hemming, Loredana Mantarosie, Alanna Susan Murphy, Maria Pia Ruggeri
Life of this patent
Estimating the term…
Abstract
Catalyst compositions and methods of preparation comprising: exchanging a rare earth element into a molecular sieve; incorporating a promoter metal into the molecular sieve; wherein the rare earth element exchanging step and the promoter metal incorporation step are performed as separate steps.
Claims15
A method of preparing a catalyst composition comprising:
- a. exchanging a rare earth element into a molecular sieve;
- b. incorporating a promoter metal into the molecular sieve;
- wherein the rare earth element exchanging step and the promoter metal incorporation step are performed as separate steps,
- wherein the promoter metal comprises copper and the catalyst composition comprises an atomic Cu:Al of 0.2 to 0.45,
- wherein the molecular sieve comprises CHA with a silica to alumina ratio (SAR) of 17 to about 23, and
- wherein the catalyst composition comprises the rare earth element in an amount of about 0.5 to about 5 wt % of the catalyst composition.
3 more elements
Dependencies are inferred from the claim text.