Removal of selenium (IV) and (VI) from acidic copper sulphate solutions
US4330508A · kind A · utility
7Cited by
3References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 24, 1980 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Oct 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B19/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for removing dissolved selenium IV values from an acidic aqueous copper sulphate solution includes passing the solution through a tubular member in a plug flow manner and injecting sulphur dioxide or a sulphite solution into the solution as it enters the tubular member. When the sulphate solution also contains dissolved selenium (VI) values, the ratio of dissolved selenium (IV) values to dissolved selenium (VI) values is preferably at least 3 to 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.