Process for removing and recovering ammonia from organic metal extractant solutions in a liquid-liquid metal extraction process
US5788844A · kind A · utility
10Cited by
18References
29Claims
0Family size
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Key dates
| Filing date | Jun 8, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jun 8, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for removing and recovering ammonia from the organic extraction phase in a metal liquid-liquid extraction process in which at least one ammoniacal aqueous solution (either a leach feed solution containing the metal to be extracted or an aqueous stripping solution employed to strip the metal values from the organic phase) is contacted with the organic phase which comprises a water insoluble, water immiscible hydrocarbon solvent solution of a water insoluble organic extractant for the metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.