Process for removal of hazardous air pollutants from coal
US6156281A · kind A · utility
11Cited by
4References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process for removing mercury and other trace elements from coal containing pyrite by forming a slurry of finely divided coal in a liquid solvent capable of forming ions or radicals having a tendency to react with constituents of pyrite or to attack the bond between pyrite and coal and/or to react with mercury to form mercury vapors, and heating the slurry in a closed container to a temperature of at least about 50.degree. C. to produce vapors of the solvent and withdrawing vapors including solvent and mercury-containing vapors from the closed container, then separating mercury from the vapors withdrawn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.