US4035476A
Expired / Lapsed
US
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Process for the preparation of agglomerated vanadium oxides
Assignee: Treibacher Chemische Werke AG
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Filing: 1976-02-17
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Granted: 1977-07-12
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Expires: 1996-02-17
Abstract
Abstract Agglomerated vanadium oxides of the formula V 2 O x , wherein x is between 3.8 and 4.6, are prepared by thermally decomposing ammonium polyvanadate at 600°-900° C and permitting the resultant solid decomposition products and reducing gases to react. The reducing gases displace the air and/or scavenging gas in the reaction zone.
Inventors
- 👤 Bernard Ilmaier
- 👤 Wolfgang Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:18
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; C01P; C01P2004/00; C01P2004/50; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A process for the preparation of agglomerated vanadium oxides of the formula V 2 O x , wherein x has a value of 3.8 to 4.6, comprising the steps of thermally decomposing ammonium polyvanadate in a reaction zone at temperatures from about 600° C. to 900° C. to obtain reaction products including solid decomposition products and reducing gases, the ammonium polyvanadate containing, by weight, 48- 51% V, 5.2- 5.9% NH 3 and 0.1- 0.5% Na 2 O, and permitting the solid decomposition products to react with the reducing gases, the reducing gases displacing the ambient atmosphere in the reaction zone.
Claim 2
Dependent Claim
100 words
A process for the preparation of agglomerated vanadium oxides of the formula V 2 O x , wherein x has a value of 3.8 to 4.6, comprising the steps of thermally decomposing ammonium polyvanadate in a reaction zone at temperatures from about 600° C. to 900° C. to obtain reaction products including solid decomposition products and reducing gases, the ammonium polyvanadate containing, by weight, 48- 51% V, 5.2- 5.9% NH 3 and 0.1- 0.5% Na 2 O, and permitting the solid decomposition products to react with the reducing gases, the reducing gases displacing the ambient atmosphere in the reaction zone.
Claim 3
Dependent Claim
11 words
The process of claim 1, wherein x is 4.0 to 4.3.
Claim 4
Dependent Claim
11 words
The process of claim 1, wherein the ambient atmosphere is air.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein the ambient atmosphere is a scavenging gas.
Claim 6
Dependent Claim
15 words
The process of claim 1, wherein the temperatures range from 680° C. to 800° C.
Claim 7
Dependent Claim
24 words
The process of claim 1, wherein the reducing gases and the solid decomposition products are passed through the reaction zone in the same direction.
Claim 8
Dependent Claim
10 words
The process of claim 1, wherein the reaction is continuous.
Claim 9
Dependent Claim
14 words
The process of claim 1, wherein the reaction products are agitated during the reaction.
Claim 10
Dependent Claim
15 words
The process of claim 1, wherein the temperatures range from 650° C. to 800° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |