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US3932305A
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V-P-Zr Catalysts and method of preparation thereof in the absence of hydrogen halide
Assignee: Mobil Oil AS
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Filing: 1974-04-17
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Granted: 1976-01-13
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Expires: 1994-04-17
Abstract
Abstract V-P-Zr catalysts having high activity and selectivity and good physical strength for the oxidation of alkanes, cycloalkanes and mixtures rich in them to dicarboxylic acid anhydrides (e.g. maleic anhydride) are prepared by reacting an aqueous mixture of vanadium pentoxide and a hydroxy-or oxo- alkanoic acid or formaldehyde, a zirconium salt, and phosphoric acid.
Inventors
- 👤 Anthony T. Jurewicz
- 👤 Lewis Brewster Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:26
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/31; C07C51/313; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C07C51/21; C07C51/215; C07C51/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A method for preparing a vanadium-phosphorus-zirconium catalyst composite that consists essentially of: a forming an aqueous mixture of a vanadium compound selected from the group consisting of V 2 O 5 , VOCl 3 , VO(NO 3 ) 3 , NH 4 VO 3 , and VF 5 and a reactant selected from the group consisting of hydroxy-alkanoic acids having 2-3 carbon atoms and oxo-alkanoic acids having 2-3 carbon atoms in a ratio of said reactant to vanadium compound of between about 0.05 and about 1, refluxing said mixture for between about 0.5 hour and 5 hours; b adding a zirconium salt selected from the group consisting of ZrOCl 2 .sup.. 4H 2 O, ZrOCl 2 .sup.. 8H 2 O, ZrO(OAc) 2 .sup.. H.sub. 2 O, ZrCl 4 , Zr(OAc) 4 , Na 2 ZrCl 6 , and ZrOBr 2 .sup.. xH.sub. 2 O, in a Zr/V atomic ratio of between about 0.0025 and about 0.5, continuing refluxing for between about 0.5 hour and about 5 hours; c adding phosphoric acid or a compound hydrolyzable to phosphoric acid, in a P/V atomic ratio of between about 1.1/1 and about 1.5/1, continuing refluxing for between about 0.5 hour and about 5 hours to form a slurry; and d drying said slurry.
Claim 2
Independent Claim
210 words
A method for preparing a vanadium-phosphorus-zirconium catalyst composite that consists essentially of: a forming an aqueous mixture of a vanadium compound selected from the group consisting of V 2 O 5 , VOCl 3 , VO(NO 3 ) 3 , NH 4 VO 3 , and VF 5 and a reactant selected from the group consisting of hydroxy-alkanoic acids having 2-3 carbon atoms and oxo-alkanoic acids having 2-3 carbon atoms in a ratio of said reactant to vanadium compound of between about 0.05 and about 1, refluxing said mixture for between about 0.5 hour and 5 hours; b adding a zirconium salt selected from the group consisting of ZrOCl 2 .sup.. 4H 2 O, ZrOCl 2 .sup.. 8H 2 O, ZrO(OAc) 2 .sup.. H.sub. 2 O, ZrCl 4 , Zr(OAc) 4 , Na 2 ZrCl 6 , and ZrOBr 2 .sup.. xH.sub. 2 O, in a Zr/V atomic ratio of between about 0.0025 and about 0.5, continuing refluxing for between about 0.5 hour and about 5 hours; c adding phosphoric acid or a compound hydrolyzable to phosphoric acid, in a P/V atomic ratio of between about 1.1/1 and about 1.5/1, continuing refluxing for between about 0.5 hour and about 5 hours to form a slurry; and d drying said slurry.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein said reactant is glycolic acid.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said zirconium salt is zirconyl acetate.
Claim 5
Dependent Claim
12 words
The method of claim 2, wherein said zirconium salt is zirconyl acetate.
Claim 6
Dependent Claim
11 words
The method of claim 1, wherein said reactant is pyruvic acid.
References Cited (Backward Citations)
US2773921A
Cited
US3156705A
Cited
US3156707A
Cited
US3293268A
Cited
US3684741A
Cited
US3832359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |