Treating and cleaning coal methods
US4244699A · kind A · utility
20Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jan 15, 1999 |
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.