Method and apparatus for coal separation using fluorinated hydrocarbons
US4178231A · kind A · utility
9Cited by
4References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1978 |
| Grant date | Dec 11, 1979 |
| Priority date | — |
| Expiry date | Jul 31, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B9/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Coal is separated in a gravity separator using a fluorinated hydrocarbon parting liquid. The cleaned coal is burned and the ash mixed with recovered parting liquid and returned to the gravity separator. Additives may be dispersed in the parting liquid to alter the physical and/or chemical characteristics of the products. The additive may be a dustproofing or a waterproofing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.