Method using selected carbons to react with Al2O and Al vapors in the carbothermic production of aluminum
US6849101B1 · kind B1 · utility
6Cited by
8References
12Claims
0Family size
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Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Dec 4, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B21/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a method for recovering Al from an off-gas (3,4) produced during carbothermic reduction of aluminum utilizing at least one smelter (1,2), the off-gas (3,4) is directed to an enclosed reactor (5) which is fed a supply of wood charcoal (7) having a porosity of from about 50 vol. % to 85 vol. % and an average pore diameter of from about 0.05 μm to about 2.00 μm, where the wood charcoal (7) contacts the off-gas (3,4) to produce at least Al4C3 (6), which is passed back to the smelter (1,2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.