Metal extraction process using quaternary ammonium thiocyanates
US3976742A · kind A · utility
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1References
12Claims
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Key dates
| Filing date | Mar 6, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Mar 6, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improvement in the process of extracting metal from aqueous acidic solution using a quaternary ammonium thiocyanate extractant wherein a special amount of thiocyanate ion is introduced into the aqueous solution prior to or contemporaneously with the extraction. Results achieved are better extractions with little or no additional loss of thiocyanate ion in the aqueous raffinate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.