Method of processing non-ferrous smelting intermediates containing arsenic
US8092765B2 · kind B2 · utility
3Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Jul 11, 2008 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jul 11, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To extract arsenic from intermediates containing arsenic, to outside the system in stable form. A method of processing non-ferrous smelting intermediate containing arsenic in sulfide form and a non-ferrous smelting intermediate containing arsenic and copper as metal; a solution adjusting step of adding an oxidation agent to the leaching solution to oxidize trivalent arsenic to pentavalent arsenic and obtain an adjusting solution; and a crystallization step of converting arsenic in the adjusted solution to scorodite crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.