Coking of bituminous solids with hot solids recycle
US4082646A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jun 17, 1977 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jun 17, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/008
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coked solids, produced by coking of tar sands, are contacted in a first zone with air and the minimum amount of supplemental fuel needed to burn all the coke. Part of the hot clean mineral solids produced is then discarded; the balance is moved into a second zone. Here supplemental fuel is burned to increase the temperature of the solids. The hot solids from the second zone are recycled to the coking stage. Only part of the solids is heated with supplemental fuel, thereby reducing consumption of the latter. In addition, the flue gas from the second zone is relatively clean and can be vented directly to the atmosphere in the flue gas from the first zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.