Process and system for dewatering oil sands fine tailings
US9963365B2 · kind B2 · utility
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10References
16Claims
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Key dates
| Filing date | Mar 13, 2013 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Nov 11, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A dewatering process comprises dispersing an anionic polymer flocculant in a slurry comprising water and oil sands fine tailings to form flocs comprising fines bridged by the anionic polymer flocculant. A cationic polymer flocculant is subsequently dispersed in the flocculated slurry to further flocculate the flocs and form floc aggregates. The floc aggregates comprise flocs bridged by the cationic polymer flocculant. The floc aggregates are then compressed to remove water and form a dewatered compact. A system is also provided for the dewatering processes using inline mixtures and a filter press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.