Treatment of tumbler reject
US4131535A · kind A · utility
3Cited by
2References
1Claims
0Family size
Assignees
- Her Majesty the Queen in right of Canada, as represented by the Minister of Energy, Mines and Resources Canada
- Her Majesty the Queen in right of the Province of Alberta, Government of the Province of Alberta, Department of Energy and Natural Resources, Alberta Syncrude Equity
- Ontario Energy Corp.
- Imperial Oil Limited
- Canada-Cities Service, Ltd.
- Gulf Oil Canada Ltd.
Inventor
Key dates
| Filing date | Feb 14, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Feb 14, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In the hot water process wherein tar sand is slurried in a tumbler with hot water and sodium hydroxide, oversized material, rejected from the tumbler, is mixed with a portion of slurry flood water in a second slurrying device and subjected therein to heating and dispersal of bitumen associated with the rejects. A bitumen-containing slurry is produced from the second device and this slurry is combined with the tumbler slurry and subsequently subjected to flotation to recover bitumen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.