Method and composition for treating tailings
US11001761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2017 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Dec 7, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and a composition for treating tailings from a separation process are disclosed, where bitumen is separated from mineral solids. Tailings include an aqueous phase with suspended solid particulate material and residual bitumen and have a dry solids content <25 weight-%. The method includes addition of a flocculating agent including polyacrylamide to the tailings, as well as addition of an auxiliary agent including ionic liquid to tailings in conjunction with the flocculating agent. Flocs, which include solid particulate material, are formed and the formed flocs are separated from the aqueous phase. The composition in a copolymer of (meth)acrylamide and an auxiliary agent comprising ionic liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.