Stable ferric arsenate precipitation from acid copper solutions whilst minimising copper losses
US7314604B1 · kind B1 · utility
6Cited by
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6Claims
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Key dates
| Filing date | Sep 21, 1999 |
| Grant date | Jan 1, 2008 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of which includes the steps of introducing an acidic solution containing (V), copper, ferric iron and ferrous iron into a first tank of a series of continuously stirred tank reactors and, in the first tank, adding air to the solution; heating the solution to an elevated temperature; recycling a portion of selectively precipitated ferric arsenate compounds to the said first tank; and seeding the solution with ferric arsenate compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.