Patent US2728636A successfully refreshed from Google Patents.
US2728636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of nickel and cobalt
Assignee: Chemical Construction Corp
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Filing: 1951-09-13
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Granted: 1955-12-27
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Expires: 1971-09-13
Abstract
No abstract record available.
Inventors
- 👤 Jr George Frederick Van Hare
- 👤 Jr Walter Rees Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:49
CPC Classifications
C; C01; C01G; C01G51/00; C01G51/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A HYDROMETALLURGICAL PROCESS FOR RECOVERING A SUBSTANTIALLY NICKEL-FREE COBALT PRODUCT IN THE FORM OF COBALTIC HEXAMMINE SULFATE FROM A SOLUTION COMPRISING DISSOLVED COBALT AND NICKEL SULFATES WHICH COMPRISES: SATURATING SAID SOLUTION WITH AMMONIA SO AS TO INSURE FORMATION OF THE COBALT HEXAMMINE COMPLEX CATION; ADJUSTING THE SULFATE ION CONCENTRATION SO AS TO SATISFY THE DISSOLVED COBALT CONTENT STATE; SUBJECTING SAID SOLUTION AT A TEMPERATURE GREATER THAN ABOUT 150* F. AND A PRESSURE AT LEAST EQUIVALENT TO THE VAPOR PRESSURE OF THE SOLUTION TO OXIDATION WITH A SULFUR-FREE, OXYGEN-BEARING OXIDIZING GAS SELECTED FROM THE GROUP CONSISTING OF OXYGEN, OXYGEN-ENRICHED AIR AND AIR, WHEREBY DISSOLVED COBALT IS OXIDIZED AND A SUBSTANTIALLY NICKEL-FREE PRECIPITATE OF COBALTIC HEXAMMINE SULFATE IS OBTAINED; AND SEPARATING SAID COBALTIC HEXAMMINE SULFATE PRECIPITATE.
Claim 2
Dependent Claim
124 words
A HYDROMETALLURGICAL PROCESS FOR RECOVERING A SUBSTANTIALLY NICKEL-FREE COBALT PRODUCT IN THE FORM OF COBALTIC HEXAMMINE SULFATE FROM A SOLUTION COMPRISING DISSOLVED COBALT AND NICKEL SULFATES WHICH COMPRISES: SATURATING SAID SOLUTION WITH AMMONIA SO AS TO INSURE FORMATION OF THE COBALT HEXAMMINE COMPLEX CATION; ADJUSTING THE SULFATE ION CONCENTRATION SO AS TO SATISFY THE DISSOLVED COBALT CONTENT STATE; SUBJECTING SAID SOLUTION AT A TEMPERATURE GREATER THAN ABOUT 150* F. AND A PRESSURE AT LEAST EQUIVALENT TO THE VAPOR PRESSURE OF THE SOLUTION TO OXIDATION WITH A SULFUR-FREE, OXYGEN-BEARING OXIDIZING GAS SELECTED FROM THE GROUP CONSISTING OF OXYGEN, OXYGEN-ENRICHED AIR AND AIR, WHEREBY DISSOLVED COBALT IS OXIDIZED AND A SUBSTANTIALLY NICKEL-FREE PRECIPITATE OF COBALTIC HEXAMMINE SULFATE IS OBTAINED; AND SEPARATING SAID COBALTIC HEXAMMINE SULFATE PRECIPITATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |