Preparation of colloidal dispersions of ruthenium, rhodium, osmium and iridium by the polymer-catalyzed decomposition of carbonyl cluster compounds thereof
US4252678A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Dec 4, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.