US4065468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of maleic anhydride from butane
Assignee: Standard Oil Co
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Filing: 1976-05-12
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Granted: 1977-12-27
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Expires: 1996-05-12
Abstract
Abstract Maleic anhydride is produced by the reaction of n-butane with a molecular oxygen-containing gas at an elevated temperature in the presence of a catalyst composed of the combined oxides of the elements antimony, molybdenum and at least one member selected from the group consisting of iron and vanadium and optionally one or more oxides of aluminum, boron, tellurium, chromium, cobalt, nickel, copper, bismuth, phosphorus titanium and tungsten.
Inventors
- 👤 Robert K. Grasselli
- 👤 Dev D. Suresh
- 👤 Robert C. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8876; B01J23/16; B01J23/24; B01J23/8877; B01J23/8878; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; B01J27/14; B01J27/186; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B01J2523/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A process for the production of maleic anhydride by the oxidation of n-butane with molecular oxygen or a molecular oxygen-containing gas at a reaction temperature of 300° C to 600° C, in the presence of a catalyst described by the formula A.sub.a B.sub.b Sb.sub.c Mo.sub.d O.sub.e wherein A is at least one member selected from the group consisting of Fe and V; B is at least one member selected from the group consisting of Al, Cr, Co, Ni, Cu, Bi, Te, B, P, Ti and W; a is a number from 0.1 to 6; b is a number from 0 to 3; c is a number from 0.1 to 12; d is a number from 12 to 1; e is a number determined by the valence requirements of the combined elements other than oxygen present in the catalyst.
Claim 2
Dependent Claim
138 words
A process for the production of maleic anhydride by the oxidation of n-butane with molecular oxygen or a molecular oxygen-containing gas at a reaction temperature of 300° C to 600° C, in the presence of a catalyst described by the formula A.sub.a B.sub.b Sb.sub.c Mo.sub.d O.sub.e wherein A is at least one member selected from the group consisting of Fe and V; B is at least one member selected from the group consisting of Al, Cr, Co, Ni, Cu, Bi, Te, B, P, Ti and W; a is a number from 0.1 to 6; b is a number from 0 to 3; c is a number from 0.1 to 12; d is a number from 12 to 1; e is a number determined by the valence requirements of the combined elements other than oxygen present in the catalyst.
Claim 3
Dependent Claim
36 words
The process of claim 1 wherein the catalyst is supported on a carrier material selected from the group consisting of silica, alumina, zirconia, calcium-stabilized zirconia, thoria, boron phosphate, silicon carbide, pumice, clay, diatomaceous earth and titania.
Claim 4
Dependent Claim
24 words
The process of claim 1 where there is included in the mixture from 0 to 50 moles of steam per mole of the n-butane.
Claim 5
Dependent Claim
18 words
The process of claim 1 carried out at an apparent contact time of from 0.1 to 50 seconds.
Claim 6
Dependent Claim
9 words
The process of claim 1 wherein A is vanadium.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein A is vanadium and iron.
Claim 8
Dependent Claim
16 words
The process of claim 1 wherein the catalyst is VFeSb 3 Mo 12 O 48 .
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein the catalyst is Fe 2 Sb 3 Mo 12 O 47 .
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein the catalyst is V 2 Sb 3 Mo 12 O 49 .
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein the catalyst is Mo 2 FeVSb 6 O 25 .
Claim 12
Dependent Claim
16 words
The process of claim 1 wherein the catalyst is BFeVSb 3 Mo 12 O 49 .
References Cited (Backward Citations)
US2691660A
Cited
GB1157117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |