Process for the preparation of catalytic metal clusters
US5008234A · kind A · utility
16Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jan 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Compositions of matter useful as catalysts in heterogeneous reactions and comprising metal atom clusters supported on inorganic supports such as silica, alumina or zeolites are prepared by vaporizing the metal at low temperatures and pressures into an environment of ethylene and a gaseous inert solvent. A metal-ethylene complex, protected by solvent molecules is formed. The complex is melted to liquid phase and used to impregnate the support. Then the material is warmed to ambient temperature to remove the solvent, decompose the complex and form monatomic or clusters of metal on the support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.