Patent US2872306A successfully refreshed from Google Patents.
US2872306A
Expired / Lapsed
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Recovery of cobalt and nickel from ores
Assignee: Freeport Minerals Co
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Filing: 1956-05-29
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Granted: 1959-02-03
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Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Morrow John George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:24
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B23/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN A SYSTEM FOR THE SELECTIVE RECOVERY OF THE COBALT AND NICKEL CONTENT FROM MINERAL CONTAINING ALUMINUM AND AT LEAST ONE OF THE AFORESAID METALS INVOLVING LEACHING THE ORE IN FINELY DIVIDED CONDITION WITH AN EXCESS OF DILUTE SULFURIC ACID AT ELEVATED TEMPERATURES AND PRESSURE, THE IMPROVEMENT COMPRISING MIXING THE ORE IN AN AQUEOUS SULFURIC ACID SOLUTION CONTAINING ALUMINUM SULFATE OBTAINED FROM THE PRODUCT LEACH LIQUID HEREINAFTER SPECIFIED, HEATING THE RESULTING ORE SLURRY AT THE ELEVATED LEACHING TEMPERATURE UNTIL THE NICKEL AND COBALT CONTENT HAS BEEN DISSOLVED, COOLING THE SLURRY OBTAINED TO A TEMPERATURE AT WHICH BASIC ALUMIUM SULFATE PRESENT WILL CONVERT TO ALUMINUM SULFATE, AGING THE COOLED SLURRY UNTIL THE EXCESS FREE ACID HAS IN SUBSTANTIAL PART CONVERTED BASIC ALUMINUM SULFATE PRESENT IN THE LOQUID INTO SOLUBLE ALUMINUM SULFATE, SEPARATING THE PRODUCT LEACH LEACH LIQUID FROM THE SPENT ORE, RECYCLING THE ALUMINUM ULFATE IN PART OF SUCH LIQUID TO THE LEACHING STEP HEREINBEFORE SPECIFIED AND RECOVERING THE NICKEL AND COBALT CONTENT FROM THE REMAINDER OF SUCH LIQUID
Claim 2
Dependent Claim
168 words
IN A SYSTEM FOR THE SELECTIVE RECOVERY OF THE COBALT AND NICKEL CONTENT FROM MINERAL CONTAINING ALUMINUM AND AT LEAST ONE OF THE AFORESAID METALS INVOLVING LEACHING THE ORE IN FINELY DIVIDED CONDITION WITH AN EXCESS OF DILUTE SULFURIC ACID AT ELEVATED TEMPERATURES AND PRESSURE, THE IMPROVEMENT COMPRISING MIXING THE ORE IN AN AQUEOUS SULFURIC ACID SOLUTION CONTAINING ALUMINUM SULFATE OBTAINED FROM THE PRODUCT LEACH LIQUID HEREINAFTER SPECIFIED, HEATING THE RESULTING ORE SLURRY AT THE ELEVATED LEACHING TEMPERATURE UNTIL THE NICKEL AND COBALT CONTENT HAS BEEN DISSOLVED, COOLING THE SLURRY OBTAINED TO A TEMPERATURE AT WHICH BASIC ALUMIUM SULFATE PRESENT WILL CONVERT TO ALUMINUM SULFATE, AGING THE COOLED SLURRY UNTIL THE EXCESS FREE ACID HAS IN SUBSTANTIAL PART CONVERTED BASIC ALUMINUM SULFATE PRESENT IN THE LOQUID INTO SOLUBLE ALUMINUM SULFATE, SEPARATING THE PRODUCT LEACH LEACH LIQUID FROM THE SPENT ORE, RECYCLING THE ALUMINUM ULFATE IN PART OF SUCH LIQUID TO THE LEACHING STEP HEREINBEFORE SPECIFIED AND RECOVERING THE NICKEL AND COBALT CONTENT FROM THE REMAINDER OF SUCH LIQUID
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) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |