Metal recovery process
Abstract
Abstract A PROCESS FOR ELECTROLYTIC DEPOSITION OF NICKEL WHEREIN NICKEL IS EXTRACTED FROM A NICKEL-CONTAINING LIQUOR BY CONTACTING SAID LIQUOR WITH AN ION EXCHANGE MEDIUM TO BOND NICKEL TO SAID MATERIAL; NICKEL IS STRIPPED FROM SAID ION EXCHANGE MATERIAL BY CONTACT WITH AN AQUEOUS MINERAL ACID ELECTROLYTE SOLUTION HAVING A PH OF ABOUT 0.5 OR HIGHER; THE STRIPED ION EXCHANGE MEDIUM IS AGAIN CONTACTED WITH NICKEL-CONTAINING LIQUOR FOR EXTRACTION OF ADDITIONAL NICKEL; THE NICKEL PREGNANT AQUEOUS MINERAL ACID ELECTROLYTE SOLUTION FROM SAID STRIPPING OPERATION IS SUBJECTED TO ELECTROLYSIS TO DEPOSIT METALLIC NICKEL AND THE ELECTRLOYTE SOLUTION RESULTING FROM SAID ELECTROLYSIS IS RECYCLED TO THE STRIPPING OPERATION AT A RATE SUFFICIENT TO SIMULTANEOUSLY REMOVE NICKEL FROM THE ION EXCHANGE MEDIUM AND TO REDUCE THE HYDROGEN ION CONCENTRATION OF THE AQUEOUS ELECTROLYTE SOLUTION.
Inventors
- 👤 E Lowenhaupt
- 👤 E Edmunds
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |