Processing aids to improve the bitumen recovery and froth quality in oil sands extraction processes
US8764974B2 · kind B2 · utility
2Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2010 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed and claimed is a method for improving the froth quality and bitumen recovery in primary bitumen extraction processes by coagulant addition in the underwash feed water. Preferred coagulants are cationic or amphoteric polymers. Coagulant addition in the underwash feed water reduces the solids content reporting to the primary bitumen froth in a primary separation vessel (PSC). This treatment program can also be combined with dispersant addition in the dilution make-up feed water into a PSC. Preferred dispersants are low molecular weight anionic polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.