US 11,980,869 B2
Zirconia-based aqueous np-dispersion for use in coating filter substrates
David Alastair Scapens, Manchester (GB); and Deborah Jayne Harris, Manchester (GB)
Assigned to Magnesium Elektron Limited, Manchester (GB)
Appl. No. 17/423,979
Filed by MAGNESIUM ELEKTRON LIMITED, Manchester (GB)
PCT Filed Dec. 2, 2019, PCT No. PCT/GB2019/053405
§ 371(c)(1), (2) Date Jul. 19, 2021,
PCT Pub. No. WO2020/161459, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 1901560 (GB), filed on Feb. 5, 2019.
Prior Publication US 2022/0080393 A1, Mar. 17, 2022
Int. Cl. B01J 21/04 (2006.01); B01D 53/86 (2006.01); B01J 21/06 (2006.01); B01J 23/10 (2006.01); B01J 23/889 (2006.01); B01J 35/00 (2006.01); B01J 35/02 (2006.01); B01J 35/10 (2006.01); B01J 35/23 (2024.01); B01J 35/30 (2024.01); B01J 35/50 (2024.01); B01J 35/63 (2024.01); B01J 35/64 (2024.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01)
CPC B01J 23/10 (2013.01) [B01D 53/86 (2013.01); B01J 21/066 (2013.01); B01J 23/8892 (2013.01); B01J 35/23 (2024.01); B01J 35/391 (2024.01); B01J 35/50 (2024.01); B01J 35/633 (2024.01); B01J 35/651 (2024.01); B01J 35/653 (2024.01); B01J 35/657 (2024.01); B01J 37/0215 (2013.01); B01J 37/08 (2013.01); B01D 2255/2061 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2066 (2013.01); B01D 2255/2068 (2013.01); B01D 2255/20715 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9155 (2013.01); B01D 2255/9202 (2013.01); B01D 2255/9205 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aqueous dispersion of particles, the dispersion having a particle content of 10-70 wt %, and the particles comprising, on an oxide basis:
(a) 10-98 wt % in total of ZrO2+HfO2, and
(b) 2-90 wt % in total of Al2O3, CeO2, La2O3, Nd2O3, Pr6O11, Y2O3, or a transition metal oxide,
wherein the dispersion has a Z-average particle size of 100-350 nm and the particles have a crystallite size of 1-9 nm,
wherein the dispersion has a pH of 3-9.