Process for removing solid organic materials and other impurities from wet-process phosphoric acid
US4289609A · kind A · utility
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22References
19Claims
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Key dates
| Filing date | May 2, 1978 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/1431
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The solid organic materials contained in wet-process phosphoric acid are removed by froth flotation in a flotation cell in which the solid organic materials overflow with the foam from the top of the cell and the acid, after passing through the cell, is passed to extraction. The froth flotation process can also be used to remove defoamer and organic soluble materials from the wet-process phosphoric acid. Uranium in the partially purified phosphoric acid product is extracted with a suitable organic extractant, typically a mixture of mono- and di-(alkylphenyl) esters of orthophosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.