Methods of and apparatus for cleaning coal
US4173530A · kind A · utility
21Cited by
4References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods of and apparatus for cleaning coal in which fluorochlorocarbons 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.