Patent US2902345A successfully refreshed from Google Patents.
US2902345A
Expired / Lapsed
US
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Separate recovery of nickel and cobalt from mixed compounds containing the same
Assignee: Freeport Minerals Co
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Filing: 1954-11-22
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Granted: 1959-09-01
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Richard W Hyde
- 👤 Iii George Feick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:40
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/262; C22B3/33; C22B3/306; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE PROCESS OF SEPARATING NICKEL AND COBALT FROM MIXED COMPOUNDS THEREOF WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION CONTAINING SUBSTANTIALLY ONLY THE THIOCYANATES OF NICKEL, COBALT AND CALCIUM, SELECTIVELY EXTRACTING THE COBALT THIOCYANATE COMPOUND FROM SAID SOLUTION BY TAKING UP THE SAME IN A WATER IMMISCIBLE ORGANIC SOLVENT FOR SAID COBALT COMPOUND, REACTING THE EXTRACTED COBALT THIOCYANATE AND THE NICKEL THIOCYANATE SEPARATELY WITH LIME TO PRECIPITATE THE NICKEL AND COBALT IN THE FORM OF THEIR HYDROXIDES LEAVING CALCIUM THIOCYANATE IN SOLUTION, SEPARATING THE NICKEL HYDROXIDE AND COBALT HYDROXIDE FROM THE RESPECTIVE SOLUTIONS AND RECYCLING THE CALCIUM THIOCYANATE.
Claim 2
Dependent Claim
96 words
THE PROCESS OF SEPARATING NICKEL AND COBALT FROM MIXED COMPOUNDS THEREOF WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION CONTAINING SUBSTANTIALLY ONLY THE THIOCYANATES OF NICKEL, COBALT AND CALCIUM, SELECTIVELY EXTRACTING THE COBALT THIOCYANATE COMPOUND FROM SAID SOLUTION BY TAKING UP THE SAME IN A WATER IMMISCIBLE ORGANIC SOLVENT FOR SAID COBALT COMPOUND, REACTING THE EXTRACTED COBALT THIOCYANATE AND THE NICKEL THIOCYANATE SEPARATELY WITH LIME TO PRECIPITATE THE NICKEL AND COBALT IN THE FORM OF THEIR HYDROXIDES LEAVING CALCIUM THIOCYANATE IN SOLUTION, SEPARATING THE NICKEL HYDROXIDE AND COBALT HYDROXIDE FROM THE RESPECTIVE SOLUTIONS AND RECYCLING THE CALCIUM THIOCYANATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |