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    Four-way conversion catalyst having improved filter properties
    3.
    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.

    EXHAUST GAS PURIFICATION CATALYST
    7.
    发明公开
    EXHAUST GAS PURIFICATION CATALYST 审中-公开

    公开(公告)号：US20230294084A1

    公开(公告)日：2023-09-21

    申请号：US18008860

    申请日：2021-06-17

    申请人： Mitsui Mining & Smelting Co., Ltd.

    发明人： Tasuku KOMANOYA

    IPC分类号： B01J33/00 ,  B01J23/63 ,  B01J35/04 ,  B01D53/94 ,  F01N3/28

    CPC分类号： B01J33/00 ,  B01D53/9413 ,  B01J23/63 ,  B01J35/04 ,  F01N3/2825 ,  B01D2255/1021 ,  B01D2255/1025 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/90 ,  B01D2257/404 ,  F01N2330/06 ,  F01N2370/02

    摘要： Provided is an exhaust gas purification catalyst that suppresses phosphorus poisoning and improves long-term durability. The exhaust gas purification catalyst includes a phosphorus collection layer and a catalyst layer containing at least one precious metal element MP selected from the group consisting of Pt, Pd, and Rh, wherein the phosphorus collection layer is arranged on the upper layer side and/or the upstream side with respect to the catalyst layer; the phosphorus collection layer contains a composite oxide containing Al and an alkaline earth metal element Ma that includes Mg and that may include at least one selected from the group consisting of Ca, Sr, and Ba, and having a cubic spinel structure belonging to the space group Fd-3m; the composite oxide has a Ma/A1 molar ratio in a range of 0.02 or more and 0.60 or less; and the composite oxide has a peak derived from the cubic spinel structure belonging to the space group Fd-3m of the composite oxide between a diffraction angle 2θxmao that is a position of a peak derived from an alkaline earth metal oxide MaO and a diffraction angle 2θxAl203 that is a position of a peak derived from an aluminum oxide Al2O3 in an X-ray diffraction spectrum.