Method for refining of silicon
US5788945A · kind A · utility
14Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/037
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a process for removing impurities from molten silicon by treatment of molten silicon contained in a vessel with a slag having the capability of removing the impurities, particularly boron from molten silicon wherein slag is continuously or substantially continuously added to the molten silicon and that the slag is continuously or substantially continuously inactivated or removed from the silicon melt as soon as equilibrium between the slag and molten silicon is reached with respect to the impurity elements or element to be removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.