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    Four-way conversion catalyst having improved filter properties
    7.
    发明授权
    Four-way conversion catalyst having improved filter properties 有权

    公开(公告)号：US11992806B2

    公开(公告)日：2024-05-28

    申请号：US16965449

    申请日：2019-02-04

    申请人： BASF Corporation

    发明人： Florian Waltz ,  Attilio Siani ,  Thomas Schmitz ,  Stephan Siemund ,  David Schlereth ,  Hao Li

    IPC分类号： B01J21/04 ,  B01D53/94 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  F01N3/022 ,  F01N3/035 ,  F01N3/10

    CPC分类号： B01D53/945 ,  B01J23/63 ,  F01N3/022 ,  F01N3/035 ,  F01N3/101 ,  B01D2255/102 ,  B01D2255/206 ,  B01D2255/407 ,  B01D2255/9155 ,  F01N2330/06

    摘要： A four-way conversion catalyst for the treatment of an exhaust gas stream of a gasoline engine, the catalyst comprising a porous wall flow filter substrate comprising an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of passages defined by porous internal walls of the porous wall flow filter substrate, wherein the plurality of passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end; wherein in the pores of the porous internal walls and on the surface of the porous internal walls, which surface defines the interface between the porous internal walls and the passages, the catalyst comprises a three-way conversion catalytic coating comprising an oxygen storage compound and a platinum group metal supported on a refractory metal oxide; wherein in the pores of the porous internal walls, the three-way conversion catalytic coating is present as in-wall-coating and on the surface of the porous internal walls, the three-way conversion catalytic coating is present as on-wall-coating; wherein in addition to said three-way conversion catalytic coating, the catalyst comprises no further coating in the pores of the porous internal walls and no further coating on the surface of the porous internal walls.

    Four-way conversion catalyst having improved filter properties
    9.
    发明授权
    Four-way conversion catalyst having improved filter properties 有权

    公开(公告)号：US11376569B2

    公开(公告)日：2022-07-05

    申请号：US16966319

    申请日：2019-02-04

    申请人： BASF Corporation

    发明人： Thomas Schmitz ,  Attilio Siani ,  Stephan Siemund ,  Janosch Cravillon

    IPC分类号： B01J35/00 ,  B01J23/63 ,  B01D53/94 ,  B01J23/58 ,  B01J35/04 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  F01N3/10 ,  F01N3/28

    摘要： A four-way conversion catalyst for treating a gasoline engine exhaust gas has a porous wall flow filter substrate with an inlet end, outlet end, substrate axial length extending between the inlet and outlet end, and passages defined by porous internal walls of the substrate, the passages having inlet passages with an open inlet and closed outlet, and outlet passages having a closed inlet and open outlet. The internal wall pores have a three-way conversion catalytic in-wall coating with an oxygen storage compound and a platinum group metal supported on a refractory metal oxide. On at least a portion of the internal wall surface defining the interface between the internal walls and the passages, the catalyst has a porous on-wall coating from the internal wall surface to the passage. The coating has porous oxidic compound and platinum group metal content of 0 to 0.001 wt. %, of the total coating weight.