Process for electrophoretically coating a product comprised...

B - Operations – Transporting – 01 – J

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B01J 35/02 (2006.01) B01J 32/00 (2006.01) B01J 35/06 (2006.01) B01J 37/02 (2006.01) B01J 37/34 (2006.01) C25D 13/00 (2006.01)

Patent

CA 2302749

A product (20, 21, 41, 60) comprised of a three-dimensional network of material is coated with a particulate support. The coating may be applied by an electrophoretic coating procedure to apply a particulate coating on the surface or into the interior portions of such three-dimensional network of material (20, 21, 41, 60). In one embodiment, the particles are a catalyst or a catalyst precursor or a catalyst support to thereby provide a catalyst structure in which catalyst may be supported as a coating in the interior and on the exterior of a three-dimensional network of material (20, 21, 41, 60) having a high void volume. Edge effects may be reduced by control or disruption of field lines during the coating. In addition, larger particles may be electrophoretically coated onto a product (20, 21, 41, 60) by the use of smaller particles which function as a "glue".

L'invention concerne un produit (20, 21, 41, 60) formé d'un réseau tridimensionnel de matériau, revêtu d'un support particulaire. Ce revêtement peut être appliqué au moyen d'une procédure de revêtement par électrophorèse, qui permet l'application d'un revêtement particulaire sur la surface ou dans les parties intérieurs d'un tel réseau (20, 21, 41, 60) tridimensionnel de matériau. Dans une version, les particules sont un catalyseur ou un précurseur de catalyseur ou un support de catalyseur formant une structure catalytique dans laquelle le catalyseur peut être supporté sous forme de revêtement à l'intérieur ou sur l'extérieur d'un réseau (20, 21, 41, 60) tridimensionnel de matériau, présentant un volume interstitiel important. Les effets de bord peuvent être réduits par un réglage ou une interruption des lignes de champ pendant la procédure de revêtement. On peut en outre appliquer des particules plus grandes par électrophorèse sur un produit (20, 21, 41, 60) en utilisant des particules plus petites qui agissent comme "colle".

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