Treatment of phosphate-containing wastewater
US10486994B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Nov 27, 2018 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Nov 27, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for treating, and recovering phosphate compounds from, phosphate-containing wastewater. The method includes the steps of: (a) removing fluoride from the wastewater; (b) recovering a phosphate compound from the wastewater by maintaining supersaturation conditions for the phosphate compound; and (c) polishing the wastewater. A silica removal step may be optionally performed after step (a) and before step (b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.