US2805936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leaching of arsenide ores
Assignee: Individual
•
Filing: 1954-08-16
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Granted: 1957-09-10
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Felix A Schaufelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
AN ACIDIC OXIDATION PROCESS FOR LEACHING A METAL VALUE SELECTED FROM THE GROUP CONSISITNG OF COPPER, NICKEL, COBALT, SILVER AND MIXTURES THEREOF AS A DISSOLVED SULFATE FROM ORE CONTAINING SAID METAL VALUE IN ASSOCIATION WITH AT LEAST ONE CONTAMINANT METALLOID SELECTED FROM THE GROUP CONSISTING OF ARSENIC, ANTIMONY, SELENIUM AND TELLURIUM AND MIXTURES THEREOF COMPRISING THE STEPS OF; FORMING A SLURRY OF THE ORE IN AN AQUEOUS SULFURIC ACID LIQUOR, SAID SLURRY HAVING A TOTAL SULFUR SONTENT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO SAID METAL VALUE AS ITS SULFATE; SUPPLY ING IN SAID SLURRY SUFFICIENT NITRIC ACID TO PRODUCE A CONCENTRATION IN THE LIQUID OF FROM ABOUT ONE TO ABOUT FIVE PERCENT; IN THE PRESENCE OF OXYGEN GAS, HEATING RESULTANT SLURRY TO AND MAINTAINING IT AT FROM ABOUT 100* TO ABOUT 150*C.; MAINTAINING THE NITRIC ACID CONCENTRATION AT FROM ABOUT ONE TO ABOUT FIVE PERCENT, WHEREBY CONVERSION OF SAID METAL VALUE TO DISSOLVED METAL SULFATE AND OF SAID METALLOID TO AN OXIDE THEREOF IN ITS LOWER VALENT FORM IS INITIATED; CONTINUING TREATMENT BY SAID HEATING AND NITRIC ACID CONCENTRATION MAINTENANCE UNTIL SAID METAL VALUE IS SUBSTANTIALLY DISSOLVED, AND STOPPING SAID TREATMENT WHEREBY OXIDATION OF SAID METALLOID TO ITS HIGHER VALENT FORM IS MINIMIZED
Claim 2
Dependent Claim
202 words
AN ACIDIC OXIDATION PROCESS FOR LEACHING A METAL VALUE SELECTED FROM THE GROUP CONSISITNG OF COPPER, NICKEL, COBALT, SILVER AND MIXTURES THEREOF AS A DISSOLVED SULFATE FROM ORE CONTAINING SAID METAL VALUE IN ASSOCIATION WITH AT LEAST ONE CONTAMINANT METALLOID SELECTED FROM THE GROUP CONSISTING OF ARSENIC, ANTIMONY, SELENIUM AND TELLURIUM AND MIXTURES THEREOF COMPRISING THE STEPS OF; FORMING A SLURRY OF THE ORE IN AN AQUEOUS SULFURIC ACID LIQUOR, SAID SLURRY HAVING A TOTAL SULFUR SONTENT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO SAID METAL VALUE AS ITS SULFATE; SUPPLY ING IN SAID SLURRY SUFFICIENT NITRIC ACID TO PRODUCE A CONCENTRATION IN THE LIQUID OF FROM ABOUT ONE TO ABOUT FIVE PERCENT; IN THE PRESENCE OF OXYGEN GAS, HEATING RESULTANT SLURRY TO AND MAINTAINING IT AT FROM ABOUT 100* TO ABOUT 150*C.; MAINTAINING THE NITRIC ACID CONCENTRATION AT FROM ABOUT ONE TO ABOUT FIVE PERCENT, WHEREBY CONVERSION OF SAID METAL VALUE TO DISSOLVED METAL SULFATE AND OF SAID METALLOID TO AN OXIDE THEREOF IN ITS LOWER VALENT FORM IS INITIATED; CONTINUING TREATMENT BY SAID HEATING AND NITRIC ACID CONCENTRATION MAINTENANCE UNTIL SAID METAL VALUE IS SUBSTANTIALLY DISSOLVED, AND STOPPING SAID TREATMENT WHEREBY OXIDATION OF SAID METALLOID TO ITS HIGHER VALENT FORM IS MINIMIZED
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |