Self-regenerating anion exchange process for treating shale gas flowback waste water
US10125033B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Oct 14, 2015 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Jul 23, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention includes an anion exchange method that uses sulfate-containing acid mine drainage (AMD), or any sulfate containing water resource, to remove strontium, barium, and/or radium from contaminated water sources, such as but not limited to hydraulic fracturing waste water, flowback, and/or produced water, without requiring any external regenerant. The removal process may be adopted with any waste water or impaired water source containing sulfate anions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.