US 11,982,218 B2
Palladium diesel oxidation catalyst
Shiang Sung, New York, NY (US); Patrick William McCanty, Mount Bethel, PA (US); Markus Koegel, Roemerberg (DE); and Susanne Stiebels, Adenbuettel (DE)
Assigned to BASF Corporation
Filed by BASF CORPORATION, Florham Park, NJ (US)
Filed on Jan. 6, 2022, as Appl. No. 17/569,628.
Application 17/569,628 is a continuation of application No. 16/310,327, granted, now 11,248,505, previously published as PCT/IB2017/053514, filed on Jun. 13, 2017.
Claims priority of provisional application 62/351,657, filed on Jun. 17, 2016.
Prior Publication US 2022/0127987 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01J 23/02 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/63 (2006.01); B01J 35/00 (2024.01); B01J 37/02 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/103 (2013.01) [B01J 23/02 (2013.01); B01J 23/42 (2013.01); B01J 23/44 (2013.01); B01J 23/464 (2013.01); B01J 23/63 (2013.01); B01J 35/19 (2024.01); B01J 37/0242 (2013.01); B01J 37/0244 (2013.01); F01N 3/2066 (2013.01); F01N 2330/34 (2013.01); F01N 2510/0684 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An oxidation catalyst composite for abatement of exhaust gas emissions from a lean burn engine, the catalyst composite comprising:
a carrier substrate having a length, an inlet end and an outlet end; and
an oxidation catalyst material coated on the carrier substrate;
wherein the oxidation catalyst material comprises a first layer and a second layer;
wherein the first layer comprises a first oxygen storage component impregnated by a palladium (Pd) component and by a second component comprising magnesium (Mg), rhodium (Rh), and platinum (Pt);
wherein the first oxygen storage component is further impregnated with a metal selected from the group consisting of praseodymium (Pr), iron (Fe), yttrium (Y), lithium (Li), indium (In), tin (Sn), niobium (Nb), gallium (Ga), zirconium (Zr), iridium (Ir), silver (Ag), neodymium (Nd), tungsten (W), copper (Cu), zinc (Zn), molybdenum (Mo), cobalt (Co), and combinations thereof; and
wherein the second layer comprises a refractory metal oxide component impregnated by platinum (Pt) and palladium (Pd), wherein the ratio of Pt to Pd is in the range of about 1:10 to about 10:1.