Large sol-gel SiO.sub.2 monoliths containing transition metal and their production
US4851373A · kind A · utility
22Cited by
2References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 25, 1985 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Feb 25, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2201/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Sol-gel monoliths containing SiO.sub.2 and optionally B.sub.2 O.sub.3, Na.sub.2 O, Li.sub.2 O, TiO.sub.2, Al.sub.2 O.sub.3 and mixtures thereof, and a transition metal having an atomic number from 21-28 made by mixing water, a SiO.sub.2 precursor, a non-precipitating salt of a transition metal and mellitic acid to form a sol, gelling the sol, aging the gelled sol, drying the aged gelled sol and densifying by heating to from about 500.degree. C. to about 1350.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.