US2693404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating metal values from ammoniacal solutions
Assignee: Viridian Inc Canada
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Filing: 1951-01-18
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Granted: 1954-11-02
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Expires: 1971-01-18
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Mackiw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE METHOD OF TREATING SULPHIDE MATERIAL CONTAINING SULPHIDES OF AT LEAST ONE OF THE METALS NICKEL AND COBALT AND SULPHIDES OF AT LEAST ONE OTHER METAL OF LOWER SOLUBILITY IN AMMONIACAL SOLUTION THAN NICKEL SULPHIDE, WHICH METHOD COMPRISES THE STEPS OF LEACHING THE MATERIAL IN PULVERULENT FORM WITH STRONG AQUEOUS AMMONIA IN A REACTION ZONE MAINTAINED UNDER SUPERATMOSPHERIC PRESSURE AND AT ELEVATED TEMPERATURE, AGITATING THE MIXTURE IN THE REACTION ZONE, FEEDING AN OXYGEN BEARING, OXIDIZING GAS INTO THE AGITATED MIXTURE DURING THE LEACHING OPERATION, CONTINUING THE LEACHING OPERATION FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE IN THE AMMONIACAL SOLUTION, IN ADDITION TO DISSOLVED METAL VALUES, FREE AMMONIA, AND AT LEAST ONE SULPHUR COMPOUND OF THE GROUP CONSISTING OF THIOSULPHATE AND POLYTHIONATES, SAID POLYTHIONATES HAVING MORE THAN TWO
Claim 2
Independent Claim
128 words
THE METHOD OF TREATING SULPHIDE MATERIAL CONTAINING SULPHIDES OF AT LEAST ONE OF THE METALS NICKEL AND COBALT AND SULPHIDES OF AT LEAST ONE OTHER METAL OF LOWER SOLUBILITY IN AMMONIACAL SOLUTION THAN NICKEL SULPHIDE, WHICH METHOD COMPRISES THE STEPS OF LEACHING THE MATERIAL IN PULVERULENT FORM WITH STRONG AQUEOUS AMMONIA IN A REACTION ZONE MAINTAINED UNDER SUPERATMOSPHERIC PRESSURE AND AT ELEVATED TEMPERATURE, AGITATING THE MIXTURE IN THE REACTION ZONE, FEEDING AN OXYGEN BEARING, OXIDIZING GAS INTO THE AGITATED MIXTURE DURING THE LEACHING OPERATION, CONTINUING THE LEACHING OPERATION FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE IN THE AMMONIACAL SOLUTION, IN ADDITION TO DISSOLVED METAL VALUES, FREE AMMONIA, AND AT LEAST ONE SULPHUR COMPOUND OF THE GROUP CONSISTING OF THIOSULPHATE AND POLYTHIONATES, SAID POLYTHIONATES HAVING MORE THAN TWO
References Cited (Backward Citations)
US475558A
Cited
US2576314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |