US4165300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation catalysts
Assignee: Standard Oil Co
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Filing: 1977-03-21
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Granted: 1979-08-21
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Expires: 1997-03-21
Abstract
Abstract Maleic anhydride and acrylic acid are produced by the oxidation of 1,3-butadiene, n-butylenes, crotonaldehyde and furan with molecular oxygen in the vapor phase in the presence of a catalytic oxide of antimony, molybdenum, vanadium and lithium, cerium, or mixture thereof, wherein the element selected from the group consisting of calcium, iron, tungsten, magnesium, aluminum and nickel is optionally added as a reducing agent. The oxidation of 1,3-butadiene in the presence of a catalyst wherein tungsten metal is used as a reducing agent gives especially desirable high yields to maleic anhydride.
Inventors
- 👤 Serge R. Dolhyj
- 👤 Ernest C. Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:08
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/18; B01J23/20; B01J23/22; B01J23/24; B01J23/28; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8877; B01J2523/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A catalyst composition described by the formula: Y.sub.a Sb.sub.b Mo.sub.c V.sub.d Z.sub.e O.sub.x wherein Y is lithium, cerium or a mixture thereof; Z is a metal selected from the group consisting of tungsten, magnesium, aluminum and nickel; and wherein a and d are numbers from about 0.01 to about 1.0; b and c are numbers from about 1 to about 9; e is a positive number from 0 to 1; x is a number which satisfies the valence requirements of the other elements present; and wherein at least some of the molybdenum in the catalyst is present in a valence state below +6.
Claim 2
Dependent Claim
103 words
A catalyst composition described by the formula: Y.sub.a Sb.sub.b Mo.sub.c V.sub.d Z.sub.e O.sub.x wherein Y is lithium, cerium or a mixture thereof; Z is a metal selected from the group consisting of tungsten, magnesium, aluminum and nickel; and wherein a and d are numbers from about 0.01 to about 1.0; b and c are numbers from about 1 to about 9; e is a positive number from 0 to 1; x is a number which satisfies the valence requirements of the other elements present; and wherein at least some of the molybdenum in the catalyst is present in a valence state below +6.
Claim 3
Dependent Claim
15 words
The catalyst of claim 1 wherein Z is added to the catalyst as tungsten metal.
Claim 4
Dependent Claim
24 words
The catalyst of claim 2 wherein b and c are numbers from about 1.0 to about 8.0 and e is 0.001 to about 0.2.
Claim 5
Dependent Claim
9 words
The catalyst of claim 3 wherein Y is lithium.
Claim 6
Dependent Claim
22 words
The catalyst of claim 4 described by the formula Li 0 .1 SbMo 3 V 0 .1 O x +W° 0 .06.
Claim 7
Dependent Claim
9 words
The catalyst of claim 3 wherein Y is cerium.
Claim 8
Dependent Claim
22 words
The catalyst of claim 6 described by the formula Ce 0 .1 SbMo 3 V 0 .1 O x +W° 0 .06.
Claim 9
Dependent Claim
12 words
The catalyst of claim 1 wherein a is 0.01 to about 0.9.
Claim 10
Dependent Claim
13 words
The catalyst of claim 1 wherein d is about 0.01 to about 0.5.
Claim 11
Dependent Claim
12 words
The catalyst of claim 1 wherein e is 0 to about 0.2.
Claim 12
Dependent Claim
69 words
The catalyst of claim 1 wherein the catalyst is prepared by: (a) reacting an aqueous slurry containing at least molybdenum oxide with a reducing agent capable of reducing Mo +6 to obtain a slurry having a bluish color; (b) reacting the product of step (a) with antimony oxide to obtain a slurry having a darker color; and (c) recovering a solid catalyst from the mixture formed in step (b).
Claim 13
Dependent Claim
14 words
The catalyst of claim 1 wherein e is a number from 0.001 to 0.2.
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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) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |