Desulfurization of phosphogypsum
US4503018A · kind A · utility
14Cited by
30References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Feb 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F11/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Phosphogypsum is mixed with fine coal, balled, and charged to a travelling grate where the charge is heated under reducing conditions to evolve sulfur and/or sulfur dioxide for conversion into sulfuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.