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US 2023/0256398 A1Published application
Ceramic filtration element
AssigneeMANN+HUMMEL Life Sciences & Environment Holding Singapore Pte. Ltd.
InventorsFrank EHLEN, Sabine GIESSELMANN
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Abstract
The present disclosure relates to a method of preparing ceramic filtration membranes with a low defect rate and improved filtration performances. The ceramic filtration membranes have a layered structure, wherein the layers are concerted to generate an improved filtration performance.
Claims20
A multilayered ceramic filtration element comprising:
- a ceramic support structure, wherein the support structure has a mean pore size of from 0.5 to 1.5 μm;
- a membrane layer;
- and
- at least one intermediate layer interposed between the ceramic support structure and the membrane layer, wherein the at least one intermediate layer comprises particles with a particle size of D10 in the range of from 70 to 250 nm,
- wherein all layers comprise particles of at least one ceramic compound selected from the group consisting of metal oxides, metal carbides and metal nitrides, and
- the at least one intermediate layer comprises particles of the at least one ceramic compound with a Z-ratio D90/D10 of up to 4.
3 more elements
(canceled)
Dependencies are inferred from the claim text.