Treatment of produced water concentrate
US10131561B2 · kind B2 · utility
1Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2013 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Mar 25, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2301/046
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Water, for example produced water from a steam assisted gravity drainage (SAGD) or cyclic steam stimulation (CSS) heavy oil recovery operation, is treated, for example to recover water re-use in creating steam. The produced water is concentrated, for example in one or more thermal treatment devices such as an evaporator and a crystallizer. A solvent and a compound or solution comprising multivalent cations is added to the concentrate. Solids precipitate and are separated from the concentrate. The solvent may be recovered for re-use in treating more concentrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.