Effluent treatment process—pH refinement for sulphate removal
US10710911B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Jul 22, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Feb 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/18
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Disclosed is a method of decomposing ettringite, to form amorphous aluminium trihydroxide, which includes the step of lowering a pH of a slurry containing ettringite to a value between 8 and 8.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.