Removal of dissolved silicates from alcohol-silicon direct synthesis solvents
US6090965A · kind A · utility
9Cited by
26References
24Claims
0Family size
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Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/025
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dissolved silanes, silicones and silicates from solvents used in the slurry phase Direct Synthesis of alkoxysilanes are removed by adding a carboxylic acid such as formic acid to generate filterable precipitates and reusable solvent. The solvents are thereby remediated and made suitable for reuse in Direct Synthesis processes. Foaming is reduced with the remediated solvent and silicon conversion rates are higher. The precipitates are easily filtered and retain negligible quantities of solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.