US2726934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrometallurgical method of extracting metal values
Assignee: Viridian Inc Canada
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Filing: 1951-09-21
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Granted: 1955-12-13
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Expires: 1971-09-21
Abstract
No abstract record available.
Inventors
- 👤 Forward Frank Arthur
- 👤 Mackiw Vladimir Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:57
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C01; C01G; C01G1/00; C01G3/00; C01G3/14; C22B23/00; C22B23/04; C22B23/0407; C22B23/0446; C22B3/12; C22B3/14; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
THE METHOD OF EXTRACTING METAL VALUES FROM METAL BEARING OXIDIZABLE MATERIAL CONTAINING VALUES OF AT LEAST ONE OF THE METALS NICKEL, COPPER AND COBALT, SAID MATERIAL CONTAINING LESS THAN THE STOICHIOMETRIC EQUIVALENT OF SUL PHUR TO THE METAL VALUES TO BE EXTRACTED, SAID METHOD COMPRISING THE STEP OF ACTIVELY AGITATING SAID MATERIAL IN AN AQUEOUS AMMONIA SOLUTION SUBSTANTIALLY FREE FROM AMMONIUM CARBONATE AND CONTAINING FREE AMMONIA IN AMOUNT AT LEAST SUFFICIENT TO FORM AMINES OF EACH METAL PRESENT IN SAID MATERIAL TO BE DISSOLVED IN THE SOLUTION AND AN ADDED AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM SULPHATE AND AMMONIUM SULPHAMATE, SAID AMMONIUM SALT BEING PRESENT IN AMOUNT SUFFICIENT TO PROVIDE SULPHUR ATOMS IN AT LEAST THE STOICHIOMETRIC EQUIVALENT OF THE METAL VALUES TO BE DISSOLVED, CONDUCTING THE OPERATION IN A REACTION ZONE MAINTAINED AT ELEVATED TEMPERATURE AND UNDER SUPERATMOSPHERIC PRESSURE, AND FEEDING AN OXYGEN BERARING, OXIDIZING GAS INTO THE REACTION ZONE DURING THE OPERATION.
Claim 2
Independent Claim
157 words
THE METHOD OF EXTRACTING METAL VALUES FROM METAL BEARING OXIDIZABLE MATERIAL CONTAINING VALUES OF AT LEAST ONE OF THE METALS NICKEL, COPPER AND COBALT, SAID MATERIAL CONTAINING LESS THAN THE STOICHIOMETRIC EQUIVALENT OF SUL PHUR TO THE METAL VALUES TO BE EXTRACTED, SAID METHOD COMPRISING THE STEP OF ACTIVELY AGITATING SAID MATERIAL IN AN AQUEOUS AMMONIA SOLUTION SUBSTANTIALLY FREE FROM AMMONIUM CARBONATE AND CONTAINING FREE AMMONIA IN AMOUNT AT LEAST SUFFICIENT TO FORM AMINES OF EACH METAL PRESENT IN SAID MATERIAL TO BE DISSOLVED IN THE SOLUTION AND AN ADDED AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM SULPHATE AND AMMONIUM SULPHAMATE, SAID AMMONIUM SALT BEING PRESENT IN AMOUNT SUFFICIENT TO PROVIDE SULPHUR ATOMS IN AT LEAST THE STOICHIOMETRIC EQUIVALENT OF THE METAL VALUES TO BE DISSOLVED, CONDUCTING THE OPERATION IN A REACTION ZONE MAINTAINED AT ELEVATED TEMPERATURE AND UNDER SUPERATMOSPHERIC PRESSURE, AND FEEDING AN OXYGEN BERARING, OXIDIZING GAS INTO THE REACTION ZONE DURING THE OPERATION.
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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |