Patent US2842425A successfully refreshed from Google Patents.
US2842425A
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US
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Use of slag for agglomeration of rutile for shaft furnace chlorination
Assignee: Stauffer Chemical Co
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Filing: 1955-07-21
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Granted: 1958-07-08
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Expires: 1975-07-21
Abstract
No abstract record available.
Inventors
- 👤 John N Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:57
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1218; C22B34/1222; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR CHLORINATION OF RUTILE IN A SHAFT FURNACE COMPRISING FEEDING A FINELY DIVIDED CHARGE OF RUTILE. CARBON AND A MATERIAL CONTAINING AN OXIDE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESOUM INTO AN UPPER PORTION OF THE SHAFT FURNACE FOR DOWNWARD PASSAGE THROUGH A REACTION ZONE IN SAID FURNACE, SAID REACTION ZONE BEING AT AN ELEVATED TEMPERATURE WHERAT TITANIUM TETRACHLORIDE IS FORMED AND THE METAL OXIDE IS CONVERTED TO A LIQUID METAL CHLORIDE, AND INTRODUCING A STEAM OF CHLORINE INTO A LOWER PORTION OF THE SHAFT FURNACE TO PASS UPWARDLY THROUGHS THE REACTION ZONE, THE QUANTITY OF SAID MATERIAL FED BEING SUFFICIENT IN RELATION TO THE CHARGE TO PROVIDE LIQUID METAL CHLORIDE IN
Claim 2
Dependent Claim
121 words
A PROCESS FOR CHLORINATION OF RUTILE IN A SHAFT FURNACE COMPRISING FEEDING A FINELY DIVIDED CHARGE OF RUTILE. CARBON AND A MATERIAL CONTAINING AN OXIDE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESOUM INTO AN UPPER PORTION OF THE SHAFT FURNACE FOR DOWNWARD PASSAGE THROUGH A REACTION ZONE IN SAID FURNACE, SAID REACTION ZONE BEING AT AN ELEVATED TEMPERATURE WHERAT TITANIUM TETRACHLORIDE IS FORMED AND THE METAL OXIDE IS CONVERTED TO A LIQUID METAL CHLORIDE, AND INTRODUCING A STEAM OF CHLORINE INTO A LOWER PORTION OF THE SHAFT FURNACE TO PASS UPWARDLY THROUGHS THE REACTION ZONE, THE QUANTITY OF SAID MATERIAL FED BEING SUFFICIENT IN RELATION TO THE CHARGE TO PROVIDE LIQUID METAL CHLORIDE IN
References Cited (Backward Citations)
US2701179A
Cited
US2701180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |