Deposition of dispersed metal particles onto substrates...

B - Operations – Transporting – 01 – J

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B01J 21/18 (2006.01) B05D 7/00 (2006.01) B32B 15/02 (2006.01) C22B 15/00 (2006.01) H01M 4/86 (2006.01)

Patent

CA 2559147

A method for producing dispersed metal particles on a substrate and the compositions produced is disclosed. A method for producing the particles comprises exposing an organometallic and a particulate substrate to supercritical or near supercritical fluid under conditions to form a mixture of the fluid and the organometallic, allowing the mixture to remain in contact with the substrate for a time sufficient to deposit dispersed organometallic onto the substrate, venting the mixture, thereby adsorbing the organometallic onto the substrate, and reducing the dispersed organometallic to dispersed metal particles with a reducing agent.

La présente invention concerne un procédé de production de particules métalliques dispersées sur un substrat et les compositions produites. Un procédé de production des particules consiste à exposer un organométallique et un substrat particulaire à un fluide supercritique ou sensiblement supercritique dans des conditions adaptées à la formation d'un mélange du fluide et de l'organométallique; à laisser le mélange en contact avec le substrat pendant un temps suffisant pour déposer l'organométallique sur le substrat; à aérer le mélange, ceci adsorbant l'organométallique sur le substrat; puis à réduire, avec un agent réducteur, l'organométallique dispersé par rapport aux particules métalliques dispersées.

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