US2874039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of scandium from its ores
Assignee: Pechiney SA
•
Filing: 1955-06-13
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Granted: 1959-02-17
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Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Pruvot Emile Jean Baptiste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
C; C01; C01F; C01F17/00; C01F17/20; C01F17/253; C01F17/271; C22; C22B; C22B59/00; C22B1/00; C22B1/02; C22B1/08; C25; C25C; C25C3/00; C25C3/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
THE METHOD OF EXTRACTING SCANDIUM FROM ORES CONTAINING AT LEAST ONE COMPOUND OF OTHER ELEMENTS THE CHLORIDES OF WHICH VOLATILIZE AT TEMPERATURES MATERIALLY ABOVE AND BELOW THE VOLATILIZATION TEMPERATURE OF SCANDIUM CHLCRIDE, SAID ELEMENTS SELECTED FROM THE GROUP CONSISTING OF SILICON, TITANIUM, ALUMINUM, IRON, ZIRCONIUM AND YTRIUM, COMPRISING THE FOLLOWING STEPS: FINELY GRINDING SAID SCANDIUM ORE AND INTIMATELY MIXING THE GROUND ORE WITH FINELY DIVIDED CARBON; ESTABLISHING IN AN ELONGATED ZONE A TEMPERATURE GRADIENT RANGING FROM ABOUT 1000* C. TO ABOUT 350* C; INTRODUCING SAID MIXTURE INTO THE HOTTEST REGION OF SAID ZONE; CHLORINATING THE MIXTURE WHILE IN SAID HOTTEST REGION, THEREBY FORMING ANHYDROUS VOLATILE CHLORDIES OF SCANDIUM AND OF AT LEAST SOME OF SAID OTHER ELEMENTS; PASSING THE EVOLVED VOLATILE CHLORIDES THROUGH SAID ELONGATED ZONE TOWARDS THE COOLER END THEREOF, WHEREBY THE SCANDIUM CHLORIDE SEPARATES OUT SELECTIVELY IN A SOLID STATE IN AN INTERMEDIATE PORTION OF SAID ZONE, AND REMOVING THE SCANDIUM CHLORIDE SO SEPARATED.
Claim 2
Independent Claim
156 words
THE METHOD OF EXTRACTING SCANDIUM FROM ORES CONTAINING AT LEAST ONE COMPOUND OF OTHER ELEMENTS THE CHLORIDES OF WHICH VOLATILIZE AT TEMPERATURES MATERIALLY ABOVE AND BELOW THE VOLATILIZATION TEMPERATURE OF SCANDIUM CHLCRIDE, SAID ELEMENTS SELECTED FROM THE GROUP CONSISTING OF SILICON, TITANIUM, ALUMINUM, IRON, ZIRCONIUM AND YTRIUM, COMPRISING THE FOLLOWING STEPS: FINELY GRINDING SAID SCANDIUM ORE AND INTIMATELY MIXING THE GROUND ORE WITH FINELY DIVIDED CARBON; ESTABLISHING IN AN ELONGATED ZONE A TEMPERATURE GRADIENT RANGING FROM ABOUT 1000* C. TO ABOUT 350* C; INTRODUCING SAID MIXTURE INTO THE HOTTEST REGION OF SAID ZONE; CHLORINATING THE MIXTURE WHILE IN SAID HOTTEST REGION, THEREBY FORMING ANHYDROUS VOLATILE CHLORDIES OF SCANDIUM AND OF AT LEAST SOME OF SAID OTHER ELEMENTS; PASSING THE EVOLVED VOLATILE CHLORIDES THROUGH SAID ELONGATED ZONE TOWARDS THE COOLER END THEREOF, WHEREBY THE SCANDIUM CHLORIDE SEPARATES OUT SELECTIVELY IN A SOLID STATE IN AN INTERMEDIATE PORTION OF SAID ZONE, AND REMOVING THE SCANDIUM CHLORIDE SO SEPARATED.
References Cited (Backward Citations)
GB466705A
Cited
US2675890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |