Method of purifying phosphoric acid
US10189710B2 · kind B2 · utility
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3References
20Claims
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Inventor
Key dates
| Filing date | Jan 18, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Jan 18, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/234
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of purifying phosphoric acid solution produced in wet process using nanofiltration. The claimed method contains the following: (a) providing wet phosphoric feed (b) subjecting the said feed to a first nanofilter (c) produce sulfate solids (d) removing the solids (e) subjecting a second nanofilter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.