Method for rapid production of large sol-gel SiO.sub.2 containing monoliths of silica with and without transition metals
US5196382A · kind A · utility
23Cited by
4References
6Claims
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Key dates
| Filing date | Aug 16, 1990 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Aug 16, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C1/006
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing sol-gel monoliths containing SiO.sub.2 by mixing water, a SiO.sub.2 precursor and ketomalonic acid to form a sol, gelling the sol, aging the gelled sol and drying the aged gelled sol. Optional additional ingredients that may be added in the mixing step include salts of non-precipitating transition metals such as copper and/or additional precursors such as precursors for B.sub.2 O.sub.3, Na.sub.2 O, Li.sub.2 O, TiO.sub.2, Al.sub.2 O.sub.3 or mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.