US2722480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic precipitation of nickel, cobalt and zinc sulfides from dilute acid solutions
Assignee: Chemical Construction Corp
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Filing: 1954-06-21
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Granted: 1955-11-01
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Roy Tuhin Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:03
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0453; C22B23/0461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN THE HYDROMETALLURGICAL PRODUCTION OF NICKEL AND COBALT WHEREIN NON-SULFIDE ORES CONTAINING NICKEL, COBALT AND IRON ARE LEACHED WITH AN AQUEOUS ACID LIQUOR AND THE COBALT AND NICKEL CONTENT OF THE LEACH LIQUOR IS CHEMICALLY PERCIPITATED, THE IMPROVED METHOD OF CONCENTRATING AND SEPARATING NICKEL AND COBALT FROM IRON AND OTHER NON-FERROUS METAL IMPURITIES WHICH COMPRISES THE STEPS OF: ADDING SUFFICIENT ACID-NETURALIZING AGENT TO ADJUST THE FREE ACID CONTENT OF THE LIQUOR TO A PH OF FROM ABOUT 1.0 TO ABOUT 3.0; ADDING TO SO-TREATED LIQUOR FROM ABOUT 0.03 TO ABOUT 10 GRAMS PER LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF FINELY DIVIDED IRON, NICKEL, COBALT AND MIXTURES THEREOF; PLACING THE MIXTURE AT A TEMPERATURE OF FROM ABOUT 60*C. TO ABOUT 90* C. UNDER A POSITIVE OVERPRESSURE OF HYDROGEN SULFIDE GAS AND CONTINUING TREATMENT WITH AGITATION UNTIL SULFIDE PRECIPITATION SUBSTANTILALY CEASES.
Claim 2
Dependent Claim
143 words
IN THE HYDROMETALLURGICAL PRODUCTION OF NICKEL AND COBALT WHEREIN NON-SULFIDE ORES CONTAINING NICKEL, COBALT AND IRON ARE LEACHED WITH AN AQUEOUS ACID LIQUOR AND THE COBALT AND NICKEL CONTENT OF THE LEACH LIQUOR IS CHEMICALLY PERCIPITATED, THE IMPROVED METHOD OF CONCENTRATING AND SEPARATING NICKEL AND COBALT FROM IRON AND OTHER NON-FERROUS METAL IMPURITIES WHICH COMPRISES THE STEPS OF: ADDING SUFFICIENT ACID-NETURALIZING AGENT TO ADJUST THE FREE ACID CONTENT OF THE LIQUOR TO A PH OF FROM ABOUT 1.0 TO ABOUT 3.0; ADDING TO SO-TREATED LIQUOR FROM ABOUT 0.03 TO ABOUT 10 GRAMS PER LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF FINELY DIVIDED IRON, NICKEL, COBALT AND MIXTURES THEREOF; PLACING THE MIXTURE AT A TEMPERATURE OF FROM ABOUT 60*C. TO ABOUT 90* C. UNDER A POSITIVE OVERPRESSURE OF HYDROGEN SULFIDE GAS AND CONTINUING TREATMENT WITH AGITATION UNTIL SULFIDE PRECIPITATION SUBSTANTILALY CEASES.
References Cited (Backward Citations)
DE720881C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |