Low cost routes to high purity silicon and derivatives thereof
US8475758B2 · kind B2 · utility
2Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2009 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Dec 4, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is directed to a method for providing an agricultural waste product having amorphous silica, carbon, and impurities; extracting from the agricultural waste product an amount of the impurities; changing the ratio of carbon to silica; and reducing the silica to a high purity silicon (e.g., to photovoltaic silicon).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.