US3174849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage oxidation and leaching process
Assignee: Viridian Inc Canada
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Filing: 1961-10-05
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Granted: 1965-03-23
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Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Mackiw Vladimir Nicolaus
- 👤 Kunda Vasyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/06; C22B3/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
THE METHOD OF EXTRACTING OXIDIZABLE NON-FERROUS METAL VALUES FROM NON-FERROUS METAL BEARING MATERIAL WHICH CONTAINS SULPHIDE SULPHUR IN AMOUNT LESS THAN THAT REQUIRED TO COMBINE WITH THE NON-FERROUS METAL VALUES AS SULPHATES WHICH COMPRISES THE STEPS OF DISPERSING PARTICLES OF SAID "NON-FERROUS" METAL BEARING MATERIAL IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND DILUTE AQUEOUS ACID SOLUTION HAVING A PH VALUE ABOVE ABOUT PH 2.5, TO FORM A SLURRY, THE TOTAL SULPHUR CONTENT OF SAID SLURRY BEING LESS THAN THAT REQUIRED TO COMBINE WITH THE NON-FERROUS METAL VALUES AS SULPHATES, REACTING SAID SLURRY AT A TEMPEATURE ABOVE ABOUT 300*F. AND UNDER A PARTIAL PRESSURE OF OXYGEN ABOVE ABOUT 10 POUNDS PER SQUARE INCH WITH A FREE OXYGEN BEARING GAS, CONTINUING THE OXIDIZING REACTION TO OXIDIZE SUBSTANTIALLY ALL THE OXIDIZABLE NON-FERROUS METAL VALUES CONTAINED IN THE "NONFERROUS" METAL BEARING MATERIAL, COOLING THE RESULTING SLURRY AND ADDING SULPHURIC ACID THERETO IN AMOUNT SUFFICIENT TO COMBINE WITH OXIDZED NON-FERROUS METAL VALUES AS SULPHATES, DIGESTING THE ACIDIFIED SLURRY WITH AGITATION AT A TEMPERATRUE BELOW ABOUT 212*F., CONTINUING THE DIGESTION STEP WITH AGITATION TO DISSOLVE ACID SOLUBLE, OXIDIZED NON-FERROUS METAL VALUES CONTAINED IN THE SOLIDS FRACTION OF SAID SLURRY, SEPARATING UNDISSOLVED RESIDUE FROM THE SLURRY, AND TREATING THE RESULTING SOLUTION FOR THE RECOVERY OF DISSOLVE NON-FERROUS METAL VALUES.
Claim 2
Independent Claim
217 words
THE METHOD OF EXTRACTING OXIDIZABLE NON-FERROUS METAL VALUES FROM NON-FERROUS METAL BEARING MATERIAL WHICH CONTAINS SULPHIDE SULPHUR IN AMOUNT LESS THAN THAT REQUIRED TO COMBINE WITH THE NON-FERROUS METAL VALUES AS SULPHATES WHICH COMPRISES THE STEPS OF DISPERSING PARTICLES OF SAID "NON-FERROUS" METAL BEARING MATERIAL IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND DILUTE AQUEOUS ACID SOLUTION HAVING A PH VALUE ABOVE ABOUT PH 2.5, TO FORM A SLURRY, THE TOTAL SULPHUR CONTENT OF SAID SLURRY BEING LESS THAN THAT REQUIRED TO COMBINE WITH THE NON-FERROUS METAL VALUES AS SULPHATES, REACTING SAID SLURRY AT A TEMPEATURE ABOVE ABOUT 300*F. AND UNDER A PARTIAL PRESSURE OF OXYGEN ABOVE ABOUT 10 POUNDS PER SQUARE INCH WITH A FREE OXYGEN BEARING GAS, CONTINUING THE OXIDIZING REACTION TO OXIDIZE SUBSTANTIALLY ALL THE OXIDIZABLE NON-FERROUS METAL VALUES CONTAINED IN THE "NONFERROUS" METAL BEARING MATERIAL, COOLING THE RESULTING SLURRY AND ADDING SULPHURIC ACID THERETO IN AMOUNT SUFFICIENT TO COMBINE WITH OXIDZED NON-FERROUS METAL VALUES AS SULPHATES, DIGESTING THE ACIDIFIED SLURRY WITH AGITATION AT A TEMPERATRUE BELOW ABOUT 212*F., CONTINUING THE DIGESTION STEP WITH AGITATION TO DISSOLVE ACID SOLUBLE, OXIDIZED NON-FERROUS METAL VALUES CONTAINED IN THE SOLIDS FRACTION OF SAID SLURRY, SEPARATING UNDISSOLVED RESIDUE FROM THE SLURRY, AND TREATING THE RESULTING SOLUTION FOR THE RECOVERY OF DISSOLVE NON-FERROUS METAL VALUES.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |