Process for removing sulfur from coal
US4197090A · kind A · utility
4Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1978 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Feb 10, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for reducing the pyritic sulfur content of coal comprising the steps of: PA0 (1) contacting an aqueous slurry of water and pyrite-containing coal particles at elevated temperature with oxygen, the contacting of step 1 being such that without step 2 the aqueous slurry would have a pH of less than 5.5; PA0 (2) maintaining the aqueous slurry of step 1 at a pH of from about 5.5 to 12.0; and PA0 (3) recovering coal particles of reduced pyritic sulfur content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.