Produced water treatment and solids precipitation from thermal treatment blowdown
US10132145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2013 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Apr 8, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Produced water, for example from a steam assisted gravity drainage (SAGD) or cyclic steam stimulation (CSS) heavy oil recovery operation, is treated to recover water that is re-used to create steam. The produced water is treated in one or more thermal treatment devices such as an evaporator and a crystallizer. The thermal treatment produces a slurry comprising dispersed or dissolved salts and organic compounds. A water-miscible solvent for one or more of the organic compounds, for example methanol, is added to the slurry. The solids precipitate and are separated from the slurry. The solvent may be recovered for re-use in treating more slurry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.