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US 10,870,607 B2Granted
Inorganic membrane filtration articles and methods thereof
AssigneeCorning Incorporated
InventorsCurtis Robert Fekety, Yunfeng Gu, Yanxia Ann Lu, Zhen Song
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Abstract
An inorganic membrane filtration article and methods for making the same. The membrane filtration article includes a sintered flow-through ceramic honeycomb with a plurality of partition walls defining a plurality of open channels from an inlet end of the honeycomb to an outlet end of the honeycomb. The honeycomb is formed from a cordierite composition with low-sodium and/or low-potassium content for enhanced filtration performance.
Claims19
A membrane filtration article comprising:
- a sintered flow-through ceramic honeycomb comprising a plurality of porous partition walls defining a plurality of open channels, the open channels extend in an axial direction from an inlet end to an outlet end of the honeycomb, and
- a porous membrane layer with porosity from about 40% to about 60% on at least a portion of the porous partition walls,
- wherein the plurality of partition walls include a composition comprising:
- Al2O3 32-38 wt. %;
- SiO2 47-53 wt. %;
- MgO 10-16 wt. %;
- Na2O 0.01-0.10 wt. %;
- CaO 0.01-0.15 wt. %;
- Fe2O3 0.4-1.0 wt. %;
- NiO 0.001-0.01 wt. %;
- and TiO2 0.1-0.5 wt. %;
- wherein at least 95 wt. % of the composition of the porous partition walls is a cordierite crystalline phase,
- wherein the porous membrane layer comprises at least 50 wt. % of a composition comprising:
- Al2O3 31-37 wt. %;
- SiO2 45-51 wt. %;
- MgO 10-16 wt. % and (Na2O+K2O) 0.01-0.10 wt. %, and
- wherein at least 95 wt. % of the composition of the porous membrane layer is a cordierite crystalline phase.
14 more elements
A membrane filtration article comprising:
- a sintered flow-through ceramic honeycomb comprising a plurality of porous partition walls defining a plurality of open channels, the open channels extend in an axial direction from an inlet end to an outlet end of the honeycomb, and
- a porous membrane layer with porosity from about 40% to about 60% on at least a portion of the porous partition walls,
- wherein the plurality of partition walls include a composition comprising:
- Al2O3 32-38 wt. %;
- SiO2 47-53 wt. %;
- MgO 10-16 wt. %;
- Na2O 0.01-0.10 wt. %:
- CaO 0.01-0.15 wt. %;
- Fe2O3 0.4-1.0 wt. %;
- NiO 0.001-0.01 wt. %;
- and TiO2 0.1-0.5 wt. %;
- wherein at least 97 wt. % of the composition of the porous partition walls is a cordierite crystalline phase,
- wherein the porous membrane layer comprises at least 50 wt. % of a composition comprising:
- Al2O3 31-37 wt. %;
- SiO2 45-51 wt. %;
- MgO 10-16 wt. %;
- and (Na2O+K2O) 0.01-0.10 wt. %, and
- wherein at least 97 wt. % of the composition of the porous membrane layer is a cordierite crystalline phase.
15 more elements
Dependencies are inferred from the claim text.