Process for removing impurities from residual silicon powder
US4307242A · kind A · utility
16Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1980 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Nov 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for recovering and recycling elementary silicon from a direct process organohalosilane reactor system is provided, comprising the steps of analyzing a portion of effluent contact mass, such as the silicon fines from a secondary cyclone with a particle size distribution analyzer, determing the fines fractions containing the relatively greatest amounts of impurities and segregating a relatively impure fine fraction from a purer coarse fraction with the aid of an aerodynamic centrifugal classifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.