US3925531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of titanium tetrahalide
Assignee: British Titan Ltd
•
Filing: 1973-04-09
•
Granted: 1975-12-09
•
Expires: 1993-04-09
Abstract
Abstract A process for the production of titanium tetrafluoride by heating together ferric fluoride and a iron-containing titaniferous material.
Inventors
- 👤 John Hickman Moss
- 👤 Barrie Leng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:52
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/02; C01G23/028; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1218; C22B34/1222; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
42 words
A PROCESS FOR THE PRODUCTION OF TITANIUM TETRAFLUORIDE COMPRISING HEATING TOGETHER FERRIC FLUORIDE AND AN IRON-CONTAINING TITANIFEROUS MATERIAL SELECTED FROM THE GROUP CONSITING OF FERRIC OXIDE CONTAINING ILMENITE AND FERRIC OXIDE CONTAINING LEUCOXENE AND THEREAFTER SEPARATELY RECOVERING TITANIUM TETRAFLUORIDE AND FERRIC OXIDE.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE PRODUCTION OF TITANIUM TETRAFLUORIDE COMPRISING HEATING TOGETHER FERRIC FLUORIDE AND AN IRON-CONTAINING TITANIFEROUS MATERIAL SELECTED FROM THE GROUP CONSITING OF FERRIC OXIDE CONTAINING ILMENITE AND FERRIC OXIDE CONTAINING LEUCOXENE AND THEREAFTER SEPARATELY RECOVERING TITANIUM TETRAFLUORIDE AND FERRIC OXIDE.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 wherein the reactants are heated together to a temperature in the range 500*C to 1,500*C.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 2 wherein the reactants are heated together to a temperature in the range 800*C to 1,100*C.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1 wherein the ironcontaining titaniferous material is reacted with ferric fluoride vapour.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 1 wherein the ironcontaining titaniferous material is ilmenite.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 1 wherein the ferric oxide is reconverted to ferric fluoride by heating with NH4HF2 and thereafter heating the reaction product to form ferric fluoride.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 6 wherein ferric oxide is heated with NH4HF2 to a temperature in the range 120*C to 300*C.
Claim 9
Dependent Claim
24 words
A process as claimed in claim 7 wherein the ferric oxide is heated with NH4HF2 to a temperature in the range 150*C to 200*C.
Claim 10
Dependent Claim
23 words
A process as claimed in claim 6 wherein the reaction product is heated to a temperature up to 750*C to form ferric fluoride.
Claim 11
Dependent Claim
23 words
A process as claimed in claim 9 whErein the reaction product is heated to a temperature up to 500*C to form ferric fluoride.
Claim 12
Dependent Claim
23 words
A process as claimed in claim 1 wherein the ferric oxide is reconverted to ferric fluoride by reacting it with aqueous hydrogen fluoride.
Claim 13
Dependent Claim
31 words
A process as claimed in claim 6 wherein NH4F produced by the decomposition of the reaction product of ferric oxide and NH4HF2 is reconverted to NH4HF2 by heating in aqueous solution.
Claim 14
Dependent Claim
27 words
A process as claimed in claim 12 wherein the aqueous solution of NH4F is heated to a temperature in the range 120*C to 130*C to form NH4HF2.
Claim 15
Dependent Claim
14 words
A process as claimed in claim 2 wherein the iron-containing titaniferous material is preoxidized.
Claim 16
Dependent Claim
28 words
A process for the production of titanium tetrafluoride comprising heating together ferric fluoride and a preoxidised ironcontaining titaniferous material and thereafter separately recovering titanium tetrafluoride and ferric oxide.
Claim 17
Dependent Claim
28 words
A process for the production of titanium tetrafluoride comprising heating together ferric fluoride and a preoxidised ironcontaining titaniferous material and thereafter separately recovering titanium tetrafluoride and ferric oxide.
Claim 18
Dependent Claim
23 words
A process as claimed in claim 5 wherein the material is heated in air to a temperature in the range 700*C to 900*C.
Claim 19
Dependent Claim
25 words
A process as claimed in claim 15 wherein the preoxidation is carried out until substantially the whole of the iron is in the ferric state.
References Cited (Backward Citations)
US2167784A
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US2816815A
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US2900234A
Cited
US3107148A
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US3416885A
Cited
US3705007A
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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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |