High efficiency hydrocarbon reduction of silica
US4457902A · kind A · utility
4Cited by
4References
17Claims
0Family size
Inventor
Key dates
| Filing date | Jan 25, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Jan 25, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/037
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process to reduce SiO.sub.2 to produce Si, includes the steps: PA1 (a) reacting SiO.sub.2 with a saturated hydrocarbon at elevated temperature in a retort, to produce molten Si, and gases including SiO, CO, H.sub.2 and H.sub.2 O, PA1 (b) removing such gases from the retort and separating SiO in a first stream and CO, H.sub.2 O and H.sub.2 in a second stream, PA1 (c) combusting the second stream to produce heat, and PA1 (d) utilizing such heat to aid the reaction in the retort.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.