Method for extraction of iron aluminum and titanium from coal ash
US4567026A · kind A · utility
25Cited by
13References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1984 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Oct 24, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for the recovery of iron, aluminum and titanium from coal ash. The method comprises magnetically extracting magnetite from the ash, leaching the ash with a solution of a mineral acid, precipitating and removing titanium and iron hydroxides from the leach solution by adding thereto a solution of a strong base, and precipitating and removing aluminum hydroxide by contacting the remaining solution with carbon dioxide or aluminum hydroxide seeding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.