Preparation of colloidal cobalt dispersions by the...

Details Preparation of colloidal cobalt dispersions by the... Preparation of colloidal cobalt dispersions by the...

B - Operations, Transporting

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252/81

B01J 31/28 (2006.01) B01J 31/06 (2006.01) B01J 37/02 (2006.01) C09D 17/00 (2006.01) G11B 7/251 (2006.01)

Patent

CA 1141363

ABSTRACT OF THE DISCLOSURE There is disclosed a method for the preparation of a homogeneous, physically stable colloidal elemental cobalt dispersion of colloidal cobalt particles having a size in the range of from about 10 Angstrom units to about 200 Angstrom units. The method comprises preparing a solution of an active polymer in an inert solvent, and incrementally adding thereto a cobalt precursor, at a temperature at which the cobalt precursor will become bound to the active polymer and thermally decompose to produce elemental cobalt 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 cobalt catalysts. The dispersions may also be used for the preparation of ablative optical recording media.

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