Process for removing ash from coal
US4389306A · kind A · utility
8Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1981 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Sep 24, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B9/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing ash from coal comprising the steps of pulverizing the coal to fine particles, admixing water with the finely divided coal to prepare an ash-containing slurry of finely divided coal, mixing with the slurry an oil and seeds in the form of oleophilic solid grains and serving as granulating nuclei to granulate the finely divided coal, separating the resulting granules from the mixture and washing the granules with water to remove the ash, and disintegrating the washed granules to obtain a deashed coal and recover the seeds for reuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.