US3760068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fibrous alkali metal hexatitanates
Assignee: Bayer AG
•
Filing: 1971-03-23
•
Granted: 1973-09-18
•
Expires: 1991-03-23
Abstract
Abstract In the manufacture of fibrous, water-insoluble alkali metal hexatitanates of the composition Me2Ti6O13, wherein Me is an alkali metal except lithium by reaction of TiO2 with an alkali metal compound which gives a basic reaction under the reaction conditions, the improvement which comprises effecting the reaction in a sulfate melt at a temperature up to about 1,300*C. The sulfate melt is preferably an alkali metal sulfate. The TiO2 may be formed in situ by addition of some other titanium compound. The alkali metal compound preferably comprises sodium, potassium, rubidium or caesium and, expressed as the oxide, is present in about one-half to one-sixth the molar amount of the TiO2.
Inventors
- 👤 G Winter
- 👤 H Zirngibl
- 👤 M Mansmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C01; C01G; C01G23/00; C01G23/003; C01G23/005; C01P; C01P2004/00; C01P2004/10; C01P2004/54; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
Process according to claim 1, wherein the reaction is carried out at a temperature of about 9001,250*C.
Claim 2
Dependent Claim
21 words
Process according to claim 1, wherein the sulfate melt comprises an alkali metal sulfate or a mixture of alkali metal sulfates.
Claim 3
Dependent Claim
34 words
Process according to claim 1, wherein the TiO2 is formed in situ by adding at least one of titanium hydroxide, titanium nitrate, titanium sulfate, titanium halides, titanium alkoxides, titanium sulfide and a titanium-organic compound.
Claim 4
Dependent Claim
24 words
Process according to claim 1, wherein the alkali metal compound is at least one of the oxide, hydroxide, acetate, oxalate, thiocyanate, nitrite and nitrate.
Claim 5
Dependent Claim
25 words
Process according to claim 1, wherein the molar ratio of the alkali metal compound, calculated as Me2O, to the TiO2 is about 1:2 to 1:6.
Claim 6
Dependent Claim
24 words
Process according to claim 1, wherein the concentration of the reactants in the sulfate melt is up to about 40 per cent by weight.
Claim 7
Dependent Claim
24 words
Process according to claim 1, wherein the reaction is carried out in a vessel whose walls are protected from the melt by unfused sulfate.
Claim 8
Dependent Claim
90 words
Process according to claim 2, wherein the TiO2 is added as such or is formed in situ by adding at least one of titanium hydroxide, titanium nitrate, titanium sulfate, titanium halides, titanium alkoxides, titanium sulfide and a titanium-organic compound, the alkali metal compound is at least one of the oxide, hydroxide, acetate, oxalate, thiocyanate, nitrite and nitrate, the molar ratio of the alkali metal compound to TiO2 is about 1:3 to 1:5, and the concentration of the reactants in the melt is up to about 25 per cent by weight.
Claim 9
Dependent Claim
17 words
Process according to claim 1, wherein the reaction is carried out at a temperature above about 1,200*C.
References Cited (Backward Citations)
US2370443A
Cited
US2841470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |