US4283288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of butane to maleic anhydride
Assignee: BP Corp North America Inc
•
Filing: 1980-05-14
•
Granted: 1981-08-11
•
Expires: 2000-05-14
Abstract
Abstract A novel catalyst for the oxidation of butane to produce maleic anhydride comprising a phosphorus and vanadium mixed oxide wherein the catalyst is prepared by using an organic medium and has a specific phase identified by characteristic X-ray pattern. A process for the manufacture of maleic anhydride from butane feedstock utilizing the novel catalyst.
Inventors
- 👤 Carl A. Udovich
- 👤 Bernard L. Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:34
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/20; B01J23/22; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J2523/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A catalyst for the production of maleic anhydride by the oxidation of butane which comprises a phosphorus-vanadium mixed oxide, the atomic ratio of vanadium to phosphorus being in the range of 0.5:1 to 1.25:1 wherein the catalyst has a characteristic powder X-ray diffraction pattern using copper K alpha radiation as follows: ______________________________________
Line Position
angstrom 2.θ degrees
Intensity
______________________________________
5.7 15.6 67
4.5 19.7 47
3.7 24.3 36
3.3 27.1 53
3.1 28.8 26
2.9 30.5 100
2.8 32.2 17
2.7 33.7 20
______________________________________
Claim 2
Dependent Claim
84 words
A catalyst for the production of maleic anhydride by the oxidation of butane which comprises a phosphorus-vanadium mixed oxide, the atomic ratio of vanadium to phosphorus being in the range of 0.5:1 to 1.25:1 wherein the catalyst has a characteristic powder X-ray diffraction pattern using copper K alpha radiation as follows: ______________________________________
Line Position
angstrom 2.θ degrees
Intensity
______________________________________
5.7 15.6 67
4.5 19.7 47
3.7 24.3 36
3.3 27.1 53
3.1 28.8 26
2.9 30.5 100
2.8 32.2 17
2.7 33.7 20
______________________________________
Claim 3
Dependent Claim
20 words
The catalyst of claim 1, wherein there are 0.8:1 to 2:1 atoms of phosphorus present for each atom of vanadium.
Claim 4
Dependent Claim
31 words
The catalyst of claim 1 wherein a co-metal is used as a promoter wherein the total atomic ratio of the co-metal to vanadium is in the range of 0.001:1 to 0.4:1.
Claim 5
Dependent Claim
33 words
A process for the production of the catalyst of claim 1 which comprises reacting and precipitating the phosphorus-vanadium mixed oxide from the reaction mixture in an organic solvent in the presence of water.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein the organic solvent is isobutanol.
Claim 7
Dependent Claim
20 words
The process of claim 4 wherein in addition to the organic solvent, benzene or orthoxylene is employed as a co-solvent.
Claim 8
Dependent Claim
31 words
A process for the production of the catalyst of claim 3 which comprises precipitating the phosphorus-vanadium mixed oxide and the co-metal complex from an organic solvent in the presence of water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |