Metallurgical-grade silicon with a controlled structure for use in halosilane synthesis
US6391255B1 · kind B1 · utility
1Cited by
5References
3Claims
0Family size
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Key dates
| Filing date | Jan 28, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A metallurgical-grade silicon for use in alkyl or aryl halosilane synthesis, and having a structure consisting of primary silicon crystals and intermetallic compounds, particularly of silicon, aluminum and calcium, wherein at least 90% of the primary silicon crystals have an aluminum content of 50-1000 ppm. This structure substantially enhances the reactivity of the silicon in the synthesis reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.