Porous ceramic filters with catalyst coatings

Details Porous ceramic filters with catalyst coatings Porous ceramic filters with catalyst coatings

2006-11-07

2006-11-07

Jolley, Kirsten (Department: 1762)

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

C428S116000, C428S155000, C428S307300, C428S315500, C428S316600, C427S226000, C427S228000, C427S230000, C427S244000, C427S393600, C427S407100, C427S419200, C502S439000

Reexamination Certificate

active

07132150

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.

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patent: 6541407 (2003-04-01), Beall et al.
patent: 2003/0027718 (2003-02-01), Nordquist et al.

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