Increasing settling rate of fine solids in oil sand tailings
US5804077A · kind A · utility
8Cited by
4References
3Claims
0Family size
Inventors
Key dates
| Filing date | Aug 16, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Aug 16, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Calcium sulphate is added to desanded tailings derived from a hot water extraction process for recovering bitumen from oil sand. Enough calcium sulphate (100 to 200 ppm) is added to remove naphthenates and sulfonates from the aqueous phase. As a result, the settling rate of the fines in the tailings is accelerated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.