Oil recovery process including enhanced softening of produced water
US9938813B2 · kind B2 · utility
0Cited by
8References
11Claims
0Family size
Assignee
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Key dates
| Filing date | May 28, 2015 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/528
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process is provided for treating produced water resulting from an oil recovery operation. Produced water is subjected to a softening process wherein a caustic or other softening reagent is added to the produced water to increase the pH of the produced water. Downstream of softening, there is provided an evaporator for evaporating at least a portion of the produced water and producing steam and a concentrated brine. At least a portion of the concentrated brine is recycled upstream of the evaporator and mixed with the produced water and the softening reagent to enhance the softening process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.