US3928240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of molybdenum-containing oxidation catalysts
Assignee: Standard Oil Co
•
Filing: 1973-08-27
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Granted: 1975-12-23
•
Expires: 1993-08-27
Abstract
Abstract Molybdenum containing oxidation catalysts are prepared by reducing hexavalent molybdenum to a valence state below +6 prior to or during the catalyst preparation. Reproducible catalysts with superior catalytic activity are conveniently made by this process.
Inventors
- 👤 Ernest C Milberger
- 👤 Serge R Dolhyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J23/30; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/883; B01J37/00; B01J37/16; C07C51/31; C07C51/313; B01J2523/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
IN THE PROCESS FOR THE REPARATION OF OXIDATION CATALYSTS CONTAINING ANTIMONY, MOLYBDENUM AND OXYGEN OR VANADIUM. MOLYBDENUM AND OXYGEN OR TUNGSTEN, MOLYBDENUM AND OXYGEN, USING AN AQUEOUS SOLUTION OR SLURRY OF A COMPOUND CONTAINING HEXAVALENT MOLYBDENUM, THE IMPROVEMENT COMPRISING PARTIALLY REDUCING IN THE AQUEOUS SOLUTION OR SLURRY THE MOLYBDENUM IN THE COMPOUND CONTAINING HEXAVALENT MOLYBDENUM TO A VALENCE STATE BELOW +6 WITH A REDUCING AGENT CAPABLE OF REDUCING HEXAVALENT MOLYBDENUM.
Claim 2
Dependent Claim
70 words
IN THE PROCESS FOR THE REPARATION OF OXIDATION CATALYSTS CONTAINING ANTIMONY, MOLYBDENUM AND OXYGEN OR VANADIUM. MOLYBDENUM AND OXYGEN OR TUNGSTEN, MOLYBDENUM AND OXYGEN, USING AN AQUEOUS SOLUTION OR SLURRY OF A COMPOUND CONTAINING HEXAVALENT MOLYBDENUM, THE IMPROVEMENT COMPRISING PARTIALLY REDUCING IN THE AQUEOUS SOLUTION OR SLURRY THE MOLYBDENUM IN THE COMPOUND CONTAINING HEXAVALENT MOLYBDENUM TO A VALENCE STATE BELOW +6 WITH A REDUCING AGENT CAPABLE OF REDUCING HEXAVALENT MOLYBDENUM.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the catalyst contains antimony, molybdenum and oxygen.
Claim 4
Dependent Claim
14 words
The process of claim 1 whrein the catalyst contains vanadium, tungsten, molybdenum and oxygen.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the compound containing hexavalent molybdenum is molybdenum trioxide or ammonium heptamolybdate.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein the compOund containing hexavalent molybdenum is molybdenum trioxide.
Claim 7
Dependent Claim
32 words
The process in claim 1 wherein the reducing agent is a member selected from the group consisting of finely divided metal, an organic reducing agent, hydrazine hydrate, stannous ion and sulfur dioxide.
Claim 8
Dependent Claim
12 words
The process in claim 6 wherein the finely divided metal is molybdenum.
Claim 9
Dependent Claim
12 words
The process in claim 6 wherein the finely divided metal is tungsten.
Claim 10
Dependent Claim
25 words
The process of claim 1 wherein the catalyst is prepared by refluxing an aqueous mixture of the compound containing hexavalent molybdenum and a reducing agent.
References Cited (Backward Citations)
US2124388A
Cited
US2572300A
Cited
US2692293A
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US2765263A
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US2749366A
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US2847358A
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US2887473A
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US2990427A
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US3117097A
Cited
US2995609A
Cited
US3169919A
Cited
US3336100A
Cited
US3351423A
Cited
US3574729A
Cited
US3595911A
Cited
US3542842A
Cited
US3551470A
Cited
US3631104A
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US3644509A
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US3676332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |