Patent US3518440A successfully refreshed from Google Patents.
Patent US2595387A successfully refreshed from Google Patents.
US2595387A
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Method of electrolytically recovering nickel
Assignee: Bolidens Gruvaktiebolag
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Filing: 1946-02-21
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Granted: 1952-05-06
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Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kalling Bo Michael Sture
- 👤 Sundgren-Wallden Ruth Mariana
- 👤 Wallden Sven Johan
- 👤 Sivander Karl Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:41
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/06; C25C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD OF RECOVERING NICKEL FROM MATERIALS CONTAINING SAID NICKEL IN ITS METALLIC STATE THAT COMPRISES LEACHING SAID MATERIALS WITH A LEACHING LIQUOR CONTAINING SULPHURIC ACID AND SULPHUROUS ANHYDRIDE, ELECTROLYZING THE RESULTING NICKEL-CONTAINING LEACHING LIQUOR BY PASSING IT INTO THE CATHODE CHAMBER OF AN ELECTROLYTIC CELL IN THE FORM OF A SULPHATE SOLUTION CONTAINING NO MORE THAN ABOUT 1.5 GRAMS OF SULPHURIC ACID PER LITER, THE ELECTROLYTIC CELL CONTAINING AN INSOLUBLE ANODE AND A COARSE, POROUS DIAPHRAGM THAT WILL PERMIT THE FLOW OF ELECTROLYTE BETWEEN THE CATHODE AND ANODE COMPARTMENTS, CAUSING THE LEACHING LIQUOR TO FLOW FROM THE CATHODE TO THE ANODE COMPARTMENT OF THE CELL AT A VELOCITY SUCH AS WILL MAINTAIN THE LIQUOR IN THE CATHODE COMPARTMENT AT NOT MORE THAN AROUND 1.5 GRAMS OF SULPHURIC ACID PER LITER BUT WILL RAISE THE ACIDITY OF THE LEACHING LIQUOR IN THE ANODE COMPARTMENT TO AROUND 25 TO 100 GRAMS OF SULPHURIC ACID PER LITER, WITHDRAWING LEACHING LIQUOR FROM THE ANODE COMPARTMENT AND RETURNING IT TO THE LEACHING STEP OF THE PROCESS.
Claim 2
Independent Claim
172 words
A METHOD OF RECOVERING NICKEL FROM MATERIALS CONTAINING SAID NICKEL IN ITS METALLIC STATE THAT COMPRISES LEACHING SAID MATERIALS WITH A LEACHING LIQUOR CONTAINING SULPHURIC ACID AND SULPHUROUS ANHYDRIDE, ELECTROLYZING THE RESULTING NICKEL-CONTAINING LEACHING LIQUOR BY PASSING IT INTO THE CATHODE CHAMBER OF AN ELECTROLYTIC CELL IN THE FORM OF A SULPHATE SOLUTION CONTAINING NO MORE THAN ABOUT 1.5 GRAMS OF SULPHURIC ACID PER LITER, THE ELECTROLYTIC CELL CONTAINING AN INSOLUBLE ANODE AND A COARSE, POROUS DIAPHRAGM THAT WILL PERMIT THE FLOW OF ELECTROLYTE BETWEEN THE CATHODE AND ANODE COMPARTMENTS, CAUSING THE LEACHING LIQUOR TO FLOW FROM THE CATHODE TO THE ANODE COMPARTMENT OF THE CELL AT A VELOCITY SUCH AS WILL MAINTAIN THE LIQUOR IN THE CATHODE COMPARTMENT AT NOT MORE THAN AROUND 1.5 GRAMS OF SULPHURIC ACID PER LITER BUT WILL RAISE THE ACIDITY OF THE LEACHING LIQUOR IN THE ANODE COMPARTMENT TO AROUND 25 TO 100 GRAMS OF SULPHURIC ACID PER LITER, WITHDRAWING LEACHING LIQUOR FROM THE ANODE COMPARTMENT AND RETURNING IT TO THE LEACHING STEP OF THE PROCESS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |