Oxidative control of post precipitation in phosphoric acid
US4279877A · kind A · utility
5Cited by
10References
10Claims
0Family size
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Key dates
| Filing date | Jan 10, 1980 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Jan 10, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/235
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improvement in the Hill phosphoric acid process. Fe.sup.++ in high iron feed is oxidized to Fe.sup.+++ to improve post-precipitation characteristics, optionally, a minor stream from the crystallizer is returned to the oxidation zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.