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Patent US2916350A successfully refreshed from Google Patents.
US2916350A
Expired / Lapsed
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Method of purifying zirconium tetrahalide
Assignee: RMI Co
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Filing: 1957-02-19
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Granted: 1959-12-08
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Newuham Ivan Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE PROCESS FOR PURIFYING ZIRCONIUM TETRAHALIDE WHICH COMPRISES REACTING A MIXTURE OF ZIRCONIUM AND HAFNIUM TETRAHALIDES SELECTED FROM THE GROUP CONSISTING OF TETRACHLORIDES, TETRABROMIDES AND TETRAIODIDES WITH A METAL REDUCING AGENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250*F TO 550*C. IN THE PRESENCE OF A REACTION MEDIUM COMPRISING A MIXTURE OF METAL SALTS SELECTED FROM THE GROUP CONSISTING OF (A) ALUMINUM HALIDE AND SODIUM HALIDE, AND (B) LITHIUM HALDIDE AND POTASSIUM HALIDE, SELECTIVELY REDUCING SAID ZIRCONIUM TETRAHALIDE TO AT LEAST A LOWER VALENCE FORM AND OBTAINING THEREBY A REACTION PRODUCT MIXTURE HAVING A TOP LAYER CONTAINING SUBSTANTIALLY ALL OF THE UNREDUCED TETRAHALIDES AND A BOTTOM LAYER CONTAINING THE REDUCED ZIRCONIUM TETRAHALIDE, AND THEN SEPARATING THE TOP LAYER FROM THE BOTTOM LAYER.
Claim 2
Dependent Claim
123 words
THE PROCESS FOR PURIFYING ZIRCONIUM TETRAHALIDE WHICH COMPRISES REACTING A MIXTURE OF ZIRCONIUM AND HAFNIUM TETRAHALIDES SELECTED FROM THE GROUP CONSISTING OF TETRACHLORIDES, TETRABROMIDES AND TETRAIODIDES WITH A METAL REDUCING AGENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250*F TO 550*C. IN THE PRESENCE OF A REACTION MEDIUM COMPRISING A MIXTURE OF METAL SALTS SELECTED FROM THE GROUP CONSISTING OF (A) ALUMINUM HALIDE AND SODIUM HALIDE, AND (B) LITHIUM HALDIDE AND POTASSIUM HALIDE, SELECTIVELY REDUCING SAID ZIRCONIUM TETRAHALIDE TO AT LEAST A LOWER VALENCE FORM AND OBTAINING THEREBY A REACTION PRODUCT MIXTURE HAVING A TOP LAYER CONTAINING SUBSTANTIALLY ALL OF THE UNREDUCED TETRAHALIDES AND A BOTTOM LAYER CONTAINING THE REDUCED ZIRCONIUM TETRAHALIDE, AND THEN SEPARATING THE TOP LAYER FROM THE BOTTOM LAYER.
References Cited (Backward Citations)
US2744060A
Cited
US2791485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |