Drying and dedusting process
US4404085A · kind A · utility
3Cited by
6References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Jul 21, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G31/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A heating and drying process for dedusting heavy oil derived from solid hydrocarbon-containing material, such as oil shale, coal or tar sand, without the use of diluents, solvents, chemical additives or mechanical separators, such as centrifuges and filters. In the process, heavy oil is fed to a dryer, such as a screw conveyor dryer or fluid bed dryer, and separated into a dedusted stream of oil and a powdery, dust-enriched residual stream. Preferably, heavy oil residue in the residual stream is combusted to leave a spent stream for use as heat carrier material in both the dryer and retort.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.