-
公开(公告)号：US20250114772A1
公开(公告)日：2025-04-10
申请号：US18293416
申请日：2022-07-25
Applicant: Rhodia Operations
Inventor： Julien Hernandez , Oguzhan Yaglidere , Virginie Harle , Simon Ifrah
Abstract: The invention relates to a composition which is a composition C1 which is based on Al and Ce in the form of oxides; or a composition C2 which is based on Al, Ce and La in the form of oxides with the following proportions of CeO2 is between 5.0 wt % and 35.0 wt %; La2O3 (for composition C2 only) is between 0.1 wt % and 6.0 wt %; the remainder being Al2O3; and exhibiting a specific porosity profile and exhibiting the following properties of a mean size of the crystallites after calcination in air at 1100° C. for 5 hours (denoted D1100° C.-5h) which is lower than 45.0 nm; a mean size of the crystallites after calcination in air at 900° C. for 2 hours (denoted D900° C.-2h) which is lower than 25.0 nm; and an increase ΔD of the mean size of the crystallites lower than 30.0 nm, ΔD being calculated with the following formula: ΔD=D1100° C.-5h−D900° C.-2h; the mean size of the crystallites being obtained by XRD from the diffraction peak of the cubic phase corresponding to cerium oxide, generally present at 2θ between 28.0° and 30.0°.
-
公开(公告)号：US20240253019A1
公开(公告)日：2024-08-01
申请号：US18564390
申请日：2022-05-09
Applicant: RHODIA OPERATIONS
Inventor： Julien Hernandez , Oguzhan Yaglidere , Virginie Harle , Simon Ifrah
CPC classification number: B01J23/63 , B01J35/32 , B01J35/613 , B01J35/635 , B01J35/638 , B01J35/77 , B01J37/04 , B01J37/08 , B01J37/343 , B01J2235/15
Abstract: 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.
-
公开(公告)号：US20220410128A1
公开(公告)日：2022-12-29
申请号：US17781310
申请日：2020-11-25
Applicant: RHODIA OPERATIONS
Inventor： Julien Hernandez , Virginie Harle , Oguzhan Yaglidere , Andrew D. Allerton
IPC: B01J23/10 , B01J35/10 , B01J35/00 , B01J35/02 , B01J37/04 , B01J37/03 , B01J37/34 , B01J37/02 , B01J37/08 , B01J37/00
Abstract: The present invention relates to an alumina with a particular pore profile and good thermal stability. This alumina is also characterized in that it has a high bulk density. The alumina has, after calcining in air at 1100° C. for 5 hours: a pore volume in the range of pores with a size of between 5 nm and 100 nm which is between 0.50 and 0.75 mL/g, more particularly between 0.50 and 0.70 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 0.20 mL/g, more particularly less than or equal to 0.15 mL/g, or even less than or equal to 0.10 mL/g.
-
公开(公告)号：US20220410124A1
公开(公告)日：2022-12-29
申请号：US17781282
申请日：2020-11-25
Applicant: RHODIA OPERATIONS
Inventor： Julien Hernandez , Virginie Harle , Oguzhan Yaglidere , Andrew D. Allerton
IPC: B01J21/04 , C01F7/441 , C01F7/34 , B01J23/10 , B01J37/04 , B01J37/03 , B01J37/08 , B01J35/10 , B01J35/00 , B01J35/02
Abstract: The present invention relates to an alumina with a particular pore profile and good thermal stability. This alumina is also characterized in that it has a high bulk density. The alumina has, after calcining in air at 1100° C. for 5 hours: a pore volume in the range of pores with a size of between 5 nm and 100 nm which is between 0.50 and 0.75 mL/g, more particularly between 0.50 and 0.70 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 0.20 mL/g, more particularly less than or equal to 0.15 mL/g, or even less than or equal to 0.10 mL/g.
-
-
-
Search Results
4
records
(took 0.011 seconds)
