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    COMPOSITION OF ALUMINIUM OXIDE AND CERIUM OXIDE WITH A PARTICULAR POROSITY PROFILE
    1.
    发明公开
    COMPOSITION OF ALUMINIUM OXIDE AND CERIUM OXIDE WITH A PARTICULAR POROSITY PROFILE 审中-公开

    公开(公告)号：US20240253019A1

    公开(公告)日：2024-08-01

    申请号：US18564390

    申请日：2022-05-09

    申请人： RHODIA OPERATIONS

    发明人： Julien Hernandez ,  Oguzhan Yaglidere ,  Virginie Harle ,  Simon Ifrah

    IPC分类号： B01J23/63 ,  B01J35/32 ,  B01J35/61 ,  B01J35/63 ,  B01J35/77 ,  B01J37/04 ,  B01J37/08 ,  B01J37/34

    CPC分类号： B01J23/63 ,  B01J35/32 ,  B01J35/613 ,  B01J35/635 ,  B01J35/638 ,  B01J35/77 ,  B01J37/04 ,  B01J37/08 ,  B01J37/343 ,  B01J2235/15

    摘要： The present invention relates to a composition based on Al and Ce in the form of oxides (composition C1); or based on Al, Ce and La in the form of oxides (composition C2), with the following proportions: —the proportion of CeO2 is between 3.0 wt % and 35.0 wt %; —the proportion of La2O3 (for composition C2 only) is between 0.1 wt % and 6.0 wt %; —the remainder as Al2O3; exhibiting the following porosity profile: —a pore volume in the range of pores with a size of between 5 nm and 100 nm which is between 0.35 and 1.00 mL/g; and—a pore volume in the range of pores with a size of between 100 nm and 1000 nm which is less than or equal to 0.15 mL/g, these pore volumes being determined by means of the mercury porosimetry technique; and the following properties: —a mean size of the crystallites after calcination in air at 1100° C. for 5 hours (denoted D1100° C.-5 h) which is lower than 45.0 nm, preferably lower than 40.0 nm; —a mean size of the crystallites after calcination in air at 900° C. for 2 hours (denoted D900° C.-2 h) which is lower than 25.0 nm, preferably lower than 20.0 nm, even more preferably lower than 15.0 nm; and—an increase ΔD of the mean size of the crystallites lower than 30.0 nm, preferably lower than 25.0 nm, ΔD being calculated with the following formula: ΔD=D1100ºC-2h-D900C-5h; the mean size of the crystallites being obtained by XRD from the diffraction peak [111] of the cubic phase corresponding to cerium oxide, generally present at 2Φ between 28.0 and 30.0.