Method of controlling self-ignition of low rank coal
US4759772A · kind A · utility
8Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Jul 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Self-ignition of low rank coal is inhibited by application of a permanganate salt, such as potassium permanganate, together with a phosphorus compound, such as a phosphoric or polyphosphoric acid. The inhibitors are applied in aqueous solution following drying of the particulate coal. The combination treatment is much more effective than the use of a permanganate salt alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.