US 11,673,097 B2
Filtration membrane and methods of use and manufacture thereof
Elnazsadat Ale Ebrahim, Montreal (CA); Christian Moreau, Boucherville (CA); Ali Dolatabadi, Montreal (CA); Md. Saifur Rahaman, Montreal (CA); and Fariba Tarasi, Montreal (CA)
Assigned to VALORBEC, SOCIETE EN COMMANDITE, Montréal (CA)
Filed by VALORBEC, SOCIETE EN COMMANDITE, Montreal (CA)
Filed on May 11, 2020, as Appl. No. 16/872,177.
Claims priority of provisional application 62/845,590, filed on May 9, 2019.
Prior Publication US 2020/0353424 A1, Nov. 12, 2020
Int. Cl. B01D 71/02 (2006.01); B01D 69/02 (2006.01); B01D 65/08 (2006.01); B01D 69/14 (2006.01); B01D 67/00 (2006.01); B01D 69/10 (2006.01); C02F 1/72 (2023.01); C02F 1/32 (2023.01); B01D 65/02 (2006.01); C02F 101/30 (2006.01)
CPC B01D 67/0039 (2013.01) [B01D 65/02 (2013.01); B01D 65/08 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); B01D 69/145 (2013.01); B01D 71/02 (2013.01); C02F 1/32 (2013.01); C02F 1/725 (2013.01); B01D 2325/02 (2013.01); C02F 2101/30 (2013.01); C02F 2303/16 (2013.01); C02F 2303/20 (2013.01); C02F 2305/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A filtration membrane comprising a porous support substrate and a porous active layer on top of the support substrate,
wherein the active layer is formed of a network of interconnected, randomly arranged ceramic splats with ceramic particles occupying interstices between the splats, and
wherein free spaces between the particles define a network of interconnected pores extending through the thickness of the active layer,
wherein the splats are thin lamellae and the particles are spheroidal,
wherein the splats are between about 50 nm and about 1 μm thick and between about 0.2 μm and about 5 μm in width and length,
wherein the particles have an average particle size between about 0.02 μm and about 5 μm,
wherein the splats and the particles are made of a same material, and
wherein a splats:particles weight ratio in the active layer is about 30:70 and about 70:30.