US3931046A
Expired / Lapsed
US
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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: 1976-01-06
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Expires: 1994-04-17
Abstract
Abstract V-P-Zr catalysts having good activity and selectivity and high physical strength for the oxidation of alkanes, cycloalkanes and mixtures rich in them to dicarboxylic acid anhydrides (e.g. maleic anhydride) are prepared by refluxing an aqueous mixture of vanadium pentoxide and lower dialkyl phosphonate, adding a zirconium salt, and then adding phosphoric acid.
Inventors
- 👤 Benjamin Weinstein
- 👤 Anthony T. Jurewicz
- 👤 Lewis Brewster Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C07C51/31; C07C51/313
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A method for preparing a vanadium-phosphorus-zirconium catalyst composite that consists essentially of: a. forming an aqueous mixture of V 2 O 5 , VOCl 3 , VO(NO 3 ) 3 , NH 4 VO 3 , or VF 5 and a lower dialkyl phosphonate, in a P/V atomic ratio of 0.5, refluxing said mixture for between about 0.5 hour and 5 hours; b. adding ZrOCl 2 .4H 2 O, ZrOCl 2 .8H 2 O, ZrO(OAc) 2 .H 2 O, ZrCl 4 , Zr(OAc) 4 , Na 2 ZrCl 6 , or ZrOBr 2 .XH 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 0.6 and about 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
162 words
A method for preparing a vanadium-phosphorus-zirconium catalyst composite that consists essentially of: a. forming an aqueous mixture of V 2 O 5 , VOCl 3 , VO(NO 3 ) 3 , NH 4 VO 3 , or VF 5 and a lower dialkyl phosphonate, in a P/V atomic ratio of 0.5, refluxing said mixture for between about 0.5 hour and 5 hours; b. adding ZrOCl 2 .4H 2 O, ZrOCl 2 .8H 2 O, ZrO(OAc) 2 .H 2 O, ZrCl 4 , Zr(OAc) 4 , Na 2 ZrCl 6 , or ZrOBr 2 .XH 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 0.6 and about 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
13 words
The method of claim 1, wherein said lower dialkyl phosphonate is dimethyl phosphonate.
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.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |