Method and composition for treating tailings
US11845899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2021 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Apr 1, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to method and composition for treating tailings from a separation process, where bitumen is separated from mineral solids. Tailings comprise an aqueous phase with suspended solid particulate material and residual bitumen and have a dry solids content <25 weight-%. The method comprises addition of a flocculating agent comprising polyacrylamide to the tailings, as well as addition of an auxiliary agent comprising ionic liquid to tailings in conjunction with the flocculating agent. Flocs, which comprise solid particulate material, are formed and the formed flocs are separated from the aqueous phase. The composition comprises a copolymer of (meth)acrylamide and an auxiliary agent comprising ionic liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.