| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 08.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
- Contact aq NH3 thiosulfate leach soln with precious metal extraction reagent for time sufficient to extract precious me tal values from leach soln - Stripping precious metal values from the precious metal extraction reagent with aq stripping soln - Recovering the precious metal from aq stripping soln In which precious metal extraction reagent selected from: (i) one having guanidyl functionality & (ii) quaternary amine mixed with weak organic acid |
| PATENT PHOTOCOPY | Available on request |
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