Method of recovering gold from dilute gold solution
US8911533B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Mar 16, 2012 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Mar 16, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a method of recovering gold from an aqueous solution having a gold concentration of 10 mg/L or lower, using a plurality of extraction apparatuses for bringing the aqueous solution into contact with an extraction agent, arranged to configure a multi-stage extraction process, the method allowing the aqueous solution to continuously flow from the first-stage extraction process to the next-stage extraction process, while recycling the extraction medium used in each stage twice or more times for the extraction process of the same stage, without back extraction and reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.