Patent US4152339A successfully refreshed from Google Patents.
US4152339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing maleic anhydride from c4 hydrocarbons
Assignee: Scientific Design LLC
•
Filing: 1977-11-14
•
Granted: 1979-05-01
•
Expires: 1997-11-14
Abstract
Abstract A catalyst complex useful for converting normal C 4 hydrocarbons to maleic anhydride in vapor phase comprising as components vanadium, phosphorus, copper, an element selected from the Group of Te, Zr, Ni, Ce, W, Pd, Ag, Mn, Cr, Zn, Mo, Re, Sm, La, Hf, Ta, Th, Co, U, and Sn preferably with an alkali or alkaline earth metal.
Inventors
- 👤 Ralph O. Kerr
- 👤 Bruno J. Barone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:01
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/89; B01J23/8933; B01J23/898; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
94 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Me 0.005 to 0.25 wherein Me is Te, Zr, Ni, W, Pd, Mn, Cr, Mo, Re, Hf, Ta, Co, U, Sn or mixture and further containing as an active component an alkali or alkaline earth metal in the atom ratio of 0.001 to 0.1 per atom of V.
Claim 2
Dependent Claim
94 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Me 0.005 to 0.25 wherein Me is Te, Zr, Ni, W, Pd, Mn, Cr, Mo, Re, Hf, Ta, Co, U, Sn or mixture and further containing as an active component an alkali or alkaline earth metal in the atom ratio of 0.001 to 0.1 per atom of V.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein Me consists essentially of Te.
Claim 4
Dependent Claim
15 words
The process according to claim 2 wherein said catalyst complex is deposited on a carrier.
Claim 5
Dependent Claim
25 words
The process according to claim 3 wherein said catalyst complex comprises 50 to 95 percent by weight of the total of catalyst complex and carrier.
Claim 6
Dependent Claim
11 words
The process according to claim 4 wherein said carrier is niobium.
Claim 7
Dependent Claim
16 words
The process according to claim 5 wherein said feed is n-butane, n-butene, n-butadiene or mixtures thereof.
Claim 8
Dependent Claim
17 words
The process according to claim 6 wherein said feed is comprised of a predominate amount of n-butane.
Claim 9
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Ni.
Claim 10
Dependent Claim
10 words
The catalyst composition according to claim 8 further containing Ta.
Claim 11
Dependent Claim
12 words
The catalyst composition according to claim 8 further containing Re and Mo.
Claim 12
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and W.
Claim 13
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Re.
Claim 14
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Sn.
Claim 15
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Zr.
Claim 16
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Cr.
Claim 17
Dependent Claim
14 words
The process according to claim 1 wherein Me consists essentially of Te and Co.
Claim 18
Dependent Claim
12 words
The process according to claim 1 wherein Me consists essentially of Mn.
Claim 19
Dependent Claim
12 words
The process according to claim 1 wherein Me consists essentially of Mo.
Claim 20
Dependent Claim
9 words
The process according to claim 18 further containing Ni.
Claim 21
Dependent Claim
12 words
The process according to claim 1 wherein Me consists essentially of Pd.
Claim 22
Dependent Claim
12 words
The process according to claim 1 wherein Me consists essentially of Hf.
Claim 23
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Hf 0.005 to 0.25.
Claim 24
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Hf 0.005 to 0.25.
Claim 25
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Th 0.005 to 0.25.
Claim 26
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:Th 0.005 to 0.25.
Claim 27
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:U 0.005 to 0.25.
Claim 28
Dependent Claim
50 words
A process for the production of maleic anhydride comprising contacting feed of normal C 4 hydrocarbons in vapor phase at elevated temperatures with oxygen and a catalyst complex consisting essentially of as the active components in the atom ratios, vanadium 1:phosphorus 0.90 to 1.3:copper 0.005 to 0.3:U 0.005 to 0.25.
Claim 29
Dependent Claim
20 words
The process according to claim 1 wherein Me is Te, Ni, Cr, Mo, Re, Hf, Ta, U or mixtures 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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |