Process for modification of coal
US4645513A · kind A · utility
98Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Jun 21, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L5/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for upgrading the characteristics of moisture containing coal which comprises drying coal until the water content reaches substantially zero, rapidly heating the dried coal to a molding temperature of from 200.degree. to 400.degree. C. within a time of from 1 to 10 minutes, compression molding the dried coal under elevated pressure, oxidizing the molded coal and then steaming said oxidized molded coal in saturated moisture at from 80.degree. C. to 150.degree. C. from 2 to 8 hours to provide a dry upgraded coal having a decreased tendency to self-ignite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.