Methods for processing coal
US4484928A · kind A · utility
28Cited by
6References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1982 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | May 27, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods of converting raw coals into low ash fuels which are competitive with the heavier grades of petroleum-based fuels and into other products. The raw coal is comminuted in aqueous slurry until resolved into separate, particulate phases of coal and mineral matter. Then, an agglomerating agent is mixed with the slurry until the coal particles have coalesced into agglomerates, and the agglomerates are recovered from the slurry. The ash content of the product coal can be reduced even further by redispersing the product coal in clean water and then reagglomerating the particles of coal and/or by subjecting it to an acid leach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.