US4158671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation catalysts and process for preparing anhydride from alkanes
Assignee: Scientific Design LLC
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Filing: 1978-02-24
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Granted: 1979-06-19
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Expires: 1998-02-24
Abstract
Abstract A catalyst complex useful for the partial oxidation of alkanes to the corresponding anhydrides, e.g., converting normal C4 hydrocarbons to maleic anhydride in vapor phase, comprising as components vanadium, phosphorus, oxygen, Cu, Mo, Ni, Co, Cr, Nd, Ce, Ba, Y and Sm.
Inventors
- 👤 Bruno J. Barone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8878; B01J23/002; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J27/199; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B01J2523/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A process for the partial oxidation of C 4 to C 10 hydrocarbons to the corresponding anhydrides comprising contacting a feed of comprising C 4 to C 10 alkane hydrocarbons in vapor phase at elevated temperatures, with oxygen and a catalyst composition consisting of vanadium, phosphorus and oxygen and a modifying component containing each of Cu, Mo, Ni, Co, Cr, Ce, Nd, Ba, Y and Sm, wherein the atomic ratio of vanadium:phosphorus:modifying component is 1:0.90 to 1.3; 0.033 to 0.4.
Claim 2
Dependent Claim
80 words
A process for the partial oxidation of C 4 to C 10 hydrocarbons to the corresponding anhydrides comprising contacting a feed of comprising C 4 to C 10 alkane hydrocarbons in vapor phase at elevated temperatures, with oxygen and a catalyst composition consisting of vanadium, phosphorus and oxygen and a modifying component containing each of Cu, Mo, Ni, Co, Cr, Ce, Nd, Ba, Y and Sm, wherein the atomic ratio of vanadium:phosphorus:modifying component is 1:0.90 to 1.3; 0.033 to 0.4.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein said hydrocarbons is a normal hydrocarbon.
Claim 4
Dependent Claim
12 words
The process according to claim 2 wherein said normal alkane is n-butane.
Claim 5
Dependent Claim
63 words
The process according to claim 1 wherein the atomic ratio of vanadium:phosphorus:Cu:Mo:Ni:Co:Ce:Nd:Cr:Ba:Y:Am is 1:0.90 to 1.3:0.022 to 0.201:0.0025 to 0.04:0.0022 to 0.045:0.0040 to 0.066:0.0054 to 0.20:0.0022 to 0.2:0.0003 to 0.003:0.0023 to 0.0585:0.0001 to 0.02:0.0001 to 0.02, respectively, the total atomic ratio of Cu, Mo, Ni, Co, Ce, Nd, Cr, Ba, Y and Sm being in the range of at least 0.033 to 0.4.
Claim 6
Dependent Claim
34 words
The process according to claim 1 wherein said hydrocarbon comprising about 88 to 99 mol percent normal C 4 alkanes and from about 1 to 12 mol percent n-butene, benzene or a mixture thereof.
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) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |