US 12,383,870 B2
Engineered coating for filters and methods of manufacture thereof
Piyush Kar, New Britain, CT (US); Venkat Subramaniam Venkataramani, Clifton Park, NY (US); and Aravind Mohanram, Avon, CT (US)
Assigned to MOTT CORPORATION, Farmington, CT (US)
Filed by Mott Corporation, Farmington, CT (US)
Filed on Nov. 23, 2021, as Appl. No. 17/533,350.
Claims priority of provisional application 63/118,126, filed on Nov. 25, 2020.
Prior Publication US 2022/0161202 A1, May 26, 2022
Int. Cl. B01D 69/10 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/02 (2006.01)
CPC B01D 69/108 (2022.08) [B01D 67/0044 (2013.01); B01D 69/02 (2013.01); B01D 71/02231 (2022.08); B01D 71/02232 (2022.08); B01D 2323/08 (2013.01); B01D 2323/10 (2013.01); B01D 2325/0283 (2022.08); B01D 2325/04 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A porous membrane comprising:
a porous substrate;
a porous ceramic coating disposed on the porous substrate; where an average pore size of pores in the porous substrate are larger than an average pore size of pores in the porous coating; and wherein fabricating the porous membrane is conducted at a temperature less than an oxidation temperature of the substrate, while not reducing any existing oxide coating on the membrane or wherein fabricating the membrane is conducted in an inert atmosphere with low air/oxygen partial pressures and at temperatures between 400 and 1200° C. and wherein the oxygen partial pressure is from 10−9 atm to 10−3 atm;
wherein the porous ceramic coating comprises different oxides of the same metal, and the metal is titanium;
wherein the different oxides are TiO2 and Ti2O3; and
wherein the metal oxide comprises 50 to 80 wt % of TiO2 and 20 to 50 wt % of Ti2O3, based on the total weight of the metal oxide.