Preparation of colloidal dispersions of ruthenium, rhodium,...

Details Preparation of colloidal dispersions of ruthenium, rhodium,... Preparation of colloidal dispersions of ruthenium, rhodium,...

B - Operations, Transporting

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B01J 31/28 (2006.01) B01J 31/06 (2006.01) B01J 35/00 (2006.01) C07C 45/50 (2006.01) C09D 17/00 (2006.01) G11B 7/251 (2006.01)

Patent

CA 1152485

ABSTRACT OF THE DISCLOSURE There is disclosed a method for the preparation of a homogeneous, physically stable dispersion of colloidal metal particles of a transition metal selected from the group consisting of ruthenium, rhodium, osmium and iridium, having a size in the range of from about 10 Angstrom units to about 200 Angstrom units. The method comprises preparing a solution of a functional polymer in an inert solvent, and incrementally adding thereto a transition metal cluster compound at a temperature at which the transition metal cluster compound will become bound to the polymer and thermally decompose to produce elemental transition metal particles, the process being carried out in an inert atmosphere. Such dispersions may be used per se as catalysts, or may be used for the preparation of supported colloidal transition metal catalysts. The dispersions may also be used for the preparation of ablative optical recording media.

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