Preparation of colloidal group vi-a transition metal...

Details Preparation of colloidal group vi-a transition metal... Preparation of colloidal group vi-a transition metal...

B - Operations, Transporting

01

J

252/104

B01J 31/34 (2006.01) B01J 31/06 (2006.01) G11B 7/251 (2006.01)

Patent

CA 1141366

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 chromium, molybdenum and tungsten having a size in the range of from about 10 Angstrom units to about 200 Angs- trom units. The method comprises preparing a solution of a functional polymer in an inert solvent, and incrementally adding thereto a transition metal precursor, at a temperature at which the transition metal precursor 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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