Porous ceramic filters with catalyst coatings
US7132150B2 · kind B2 · utility
15Cited by
9References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 14, 2003 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Jun 6, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous ceramic catalyst supports or filters to be provided with catalyst coatings via oxide washcoating processes are pre-coated with polymer barrier layers to prevent washcoat nanoparticle intrusion into the microcracked and/or microporous surfaces of the ceramics, the barrier coatings being formed of hydrocarbon polymers that are soluble or dispersible in polar media, capable of forming neutral or hydrophilic surfaces on porous ceramic supports, and completely vaporizable at moderate washcoat stabilization or catalyst activation temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.