Drying low rank coal and retarding spontaneous ignition
US4775390A · kind A · utility
3Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Dec 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coal is rendered less subject to abrasion and disintegration by reducing it to a 0.2 to 0.5-inch particle size and drying it in a drying zone at a temperature of 200.degree. to 230.degree. F. for 3-7 minutes while simultaneously applying a treating agent which can be a light cycle oil, heavy cycle oil, clarified slurry oil, a petroleum or coal derived distillate or residuum, a solution of durene in gasoline and mixtures of two or more of the preceding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.