Clarification of black water produced during recovery of bitumens and heavy oils
US4519915A · kind A · utility
8Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1984 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Jun 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/917
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hot water is an important component in the recovery or extraction of bitumen and heavy oils. This hot water tends to form emulsions with the oil and when these emulsions are broken by demulsifiers and the oil separates, the remaining water retains a black color and cannot be recycled in the process. The black color has been most difficult to remove, but it has now been found that it can quite easily be removed by certain selected adsorbents. These include high ash coal rejects, fly ash from coking gas and red mud.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.