Methods of cleaning coal
US4447245A · kind A · utility
6Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1980 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Dec 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods of and apparatus for cleaning coal in which halogenated hydrocarbons are used as parting liquids. Various novel techniques, components, and combinations thereof are employed to maximize efficiency; to minimize costs and adverse environmental impacts; to make it possible to recover coal of a character which has heretofore been economically unrecoverable; to produce a superior product; and to reach other worthwhile goals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.