Elution process for gold-iodine complex from ion-exchange resins
US5051128A · kind A · utility
23Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | May 1, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for eluting gold-iodine complex from an ion-exchange resin, characterized by adding sulfuric acid and sodium nitrite to the gold-iodine complex adsorbed on the resin, and adding sodium sulfite as an eluant. The process is particularly useful for eluting gold-iodine complex adsorbed on strongly basic anion-exchange resin, such as washings resulting from the washing of leach residue which has been passed through the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.