US3682589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorbate extraction of metallic values from aqueous leach solutions
Assignee: Bunker Hill Co
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Filing: 1969-11-10
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Granted: 1972-08-08
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Expires: 1989-11-10
Abstract
Abstract A PROCESS FOR REMOVING METALLIC IMPURITIES SUCH AS COPPER, COBALT, NICKEL AND IRON FROM A CLARIFIED LEACH ZINC SULFATE SOLUTION IN THE PREPARATION OF A ZINC SULFATE ELECTROLYTE FOR THE ELECTROLYTIC RECOVERY OF ZINC AND THE SELECTIVE RECOVERY OF THE REMOVED METALLIC IMPURITIES. A SELECTIVE ORGANIC ION EXCHANGE EXTRACTANT IS SORBED ONTO A BED OF ACTIVATED CARBON TO FORM A SORBATE BED THAT IS SELECTIVE TO ONE OR MORE OF THE METALLIC IMPURITIES FROM THE SOLUTION AND ONTO THE SORBATE. THE METALLIC IMPURITIES ARE RECOVERED FROM THE SORBATE BED WITH AN APPROPRIATE ELUATE.
Inventors
- 👤 Raymond H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
C; C01; C01G; C01G9/00; C01G9/003; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |