Decarbonation of tailings sludge to improve settling
US4414117A · kind A · utility
28Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Sep 10, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Carbonates and bicarbonates are removed from the sludge of tar sands tailings ponds whereby solids settle from the sludge more rapidly than in the presence of the carbonates and/or bicarbonates. Hydrolyzed starch is used as a flocculant in the process and alcohol may also be used to assist in the settling and/or to improve the characteristics of the settled sludge for subsequent dewatering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.