Patent US3206413A successfully refreshed from Google Patents.
US3206413A
Expired / Lapsed
US
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Iron removal in a platinum recovery process
Assignee: Universal Oil Products Co
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Filing: 1962-11-23
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Granted: 1965-09-14
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 James G Leopard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD FOR REMOVING IRON OXIDE FROM A CARBONIZED COMPOSITE OF A REFRACTORY INORGANIC OXIDE AND A METALLIC COMPONENT FROM THE PLATIMUN-GROUP OF THEPERIODIC TABLE, WHICH COMPRISES CONTACTING SAID COMPOSITE WITH AN OXIDIZING GAS CONTAINING FEE OXYGEN AND FROM ABOUT 65% TO ABOUT 85% OF CARBON MONOXIDE, AT A TEMPERATURE WITHIN THE RANGE OF FROM 625*C. TO ABOUT 675*C. TO OXIDIZE CARBONACEOUS MATERIAL AND TO REDUCE THE IRON OXIDE TO ELEMENTAL IRON, LOWERING THE TEMPERATURE OF THE THUS TREATED COMPOSITE TO A LEVEL WITHIN THE RANGE OF FROM ABOUT 175*C. TO ABOUT 225*C., THEN CONTACTING THE COMPOSITE WITH A STREAM OF CARBON MONOXIDE AT SAID LOWER TEMPERATURE TO CONVERT THE ELEMENTAL IRON TO IRON CARBONYL VAPOR, REMOVING SAID CARBONYL VAPOR IN THE CARBON MONOXIDE STREAM, AND RECOVERING THE RESULTANT SUBSTANTIALLY IRON-FREE COMPOSITE.
Claim 2
Independent Claim
132 words
A METHOD FOR REMOVING IRON OXIDE FROM A CARBONIZED COMPOSITE OF A REFRACTORY INORGANIC OXIDE AND A METALLIC COMPONENT FROM THE PLATIMUN-GROUP OF THEPERIODIC TABLE, WHICH COMPRISES CONTACTING SAID COMPOSITE WITH AN OXIDIZING GAS CONTAINING FEE OXYGEN AND FROM ABOUT 65% TO ABOUT 85% OF CARBON MONOXIDE, AT A TEMPERATURE WITHIN THE RANGE OF FROM 625*C. TO ABOUT 675*C. TO OXIDIZE CARBONACEOUS MATERIAL AND TO REDUCE THE IRON OXIDE TO ELEMENTAL IRON, LOWERING THE TEMPERATURE OF THE THUS TREATED COMPOSITE TO A LEVEL WITHIN THE RANGE OF FROM ABOUT 175*C. TO ABOUT 225*C., THEN CONTACTING THE COMPOSITE WITH A STREAM OF CARBON MONOXIDE AT SAID LOWER TEMPERATURE TO CONVERT THE ELEMENTAL IRON TO IRON CARBONYL VAPOR, REMOVING SAID CARBONYL VAPOR IN THE CARBON MONOXIDE STREAM, AND RECOVERING THE RESULTANT SUBSTANTIALLY IRON-FREE COMPOSITE.
References Cited (Backward Citations)
US2276921A
Cited
US2641582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |