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US4093635A
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Preparation of maleic anhydride from four-carbon hydrocarbons
Assignee: Standard Oil Co
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Filing: 1976-10-19
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Granted: 1978-06-06
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Expires: 1996-10-19
Abstract
Abstract Maleic anhydride is produced by the oxidation of n-butane, n-butenes, 1,3-butadiene with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, bismuth, copper, oxygen, and a halogen selected from the group consisting of chlorine, bromine or iodine.
Inventors
- 👤 Noel J. Bremer
- 👤 James F. White
- 👤 Ernest C. Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:44
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
In a process for the preparation of maleic anhydride by the oxidation of n-butane, n-butenes, 1,3-butadiene or mixture thereof with molecular oxygen in the vapor phase at a reaction temperature of about 250° C to 600° C in the presence of a catalyst, the improvement comprising using as a catalyst a catalyst which is free of iron, cobalt, nickel, an alkali metal and an alkaline earth metal, said catalyst having the formula Mo.sub.12 P.sub.a Bi.sub.b Cu.sub.c Cl.sub.d O.sub.f wherein a, b and c are numbers from 0.001-10; d is from 0.001-5; and f is a positive number of oxygens required to satisfy the valence states of the other elements present.
Claim 2
Dependent Claim
110 words
In a process for the preparation of maleic anhydride by the oxidation of n-butane, n-butenes, 1,3-butadiene or mixture thereof with molecular oxygen in the vapor phase at a reaction temperature of about 250° C to 600° C in the presence of a catalyst, the improvement comprising using as a catalyst a catalyst which is free of iron, cobalt, nickel, an alkali metal and an alkaline earth metal, said catalyst having the formula Mo.sub.12 P.sub.a Bi.sub.b Cu.sub.c Cl.sub.d O.sub.f wherein a, b and c are numbers from 0.001-10; d is from 0.001-5; and f is a positive number of oxygens required to satisfy the valence states of the other elements present.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein a, b, and c are numbers from 0.01 to 5 and d is from 0.001 to 1.0.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein a is 0.5 to 1.5.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein b is 0.1 to 1.0.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein c is 0.1 to 1.0.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein d is 0.005 to 0.1.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein d is 0.01 to 0.5
Claim 9
Dependent Claim
27 words
The process of claim 1 wherein the catalyst employed is Mo 12 Bi 0 .5 P 1 .32 Cu 0 .25 Cl 0 .06 O f .
Claim 10
Dependent Claim
121 words
In a process for the preparation of maleic anhydride by the oxidation of 1,3-butadiene with molecular oxygen in the vapor phase at a reaction temperature of about 250° C to 600° C in the presence of a catalyst, the improvement comprising using as a catalyst a catalyst which is free of iron, cobalt, nickel, an alkali metal and an alkaline earth metal, said catalyst having the formula Mo.sub.12 P.sub.a Bi.sub.b Cu.sub.c X.sub.d O.sub.f wherein X is a halogen selected from the group consisting of chlorine, bromine or iodine; and wherein a, b and c are numbers from 0.001-10; d is from 0.001-5; and f is a positive number of oxygens required to satisfy the valence states of the other elements present.
Claim 11
Dependent Claim
121 words
In a process for the preparation of maleic anhydride by the oxidation of 1,3-butadiene with molecular oxygen in the vapor phase at a reaction temperature of about 250° C to 600° C in the presence of a catalyst, the improvement comprising using as a catalyst a catalyst which is free of iron, cobalt, nickel, an alkali metal and an alkaline earth metal, said catalyst having the formula Mo.sub.12 P.sub.a Bi.sub.b Cu.sub.c X.sub.d O.sub.f wherein X is a halogen selected from the group consisting of chlorine, bromine or iodine; and wherein a, b and c are numbers from 0.001-10; d is from 0.001-5; and f is a positive number of oxygens required to satisfy the valence states of the other elements present.
References Cited (Backward Citations)
US3293290A
Cited
US3992419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |