Patent US4283307A successfully refreshed from Google Patents.
US4283307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst structure for the partial oxidation of n-butane to produce maleic anhydride
Assignee: Scientific Design LLC
•
Filing: 1980-06-02
•
Granted: 1981-08-11
•
Expires: 2000-06-02
Abstract
Abstract Phosphorus-Vanadium oxidation catalyst prepared as tablets with a hole in the center produce higher yields of maleic anhydride from C4's, particularly n-butane than the same catalyst without the hole.
Inventors
- 👤 Bruno J. Barone
- 👤 Gaylon T. Click
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:30
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/20; B01J23/22; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J35/00; B01J35/50; B01J35/55; B01J2523/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
30 words
A normal butane partial oxidation catalyst structure comprising a cylinder having a bore therethrough, said cylinder consisting essentially of catalytic material, which is comprised of a phosphorus, vanadium, oxygen complex.
Claim 2
Dependent Claim
30 words
A normal butane partial oxidation catalyst structure comprising a cylinder having a bore therethrough, said cylinder consisting essentially of catalytic material, which is comprised of a phosphorus, vanadium, oxygen complex.
Claim 3
Dependent Claim
43 words
The normal butane partial oxidation catalyst structure according to claim 1 wherein said complex contains V, P and Me in a atomic ratio of V:P:Me of 1:0.90 to 1.3:0.001 to 0.4, Me is a metal, alkali metal, alkaline earth metal or mixture thereof.
Claim 4
Dependent Claim
66 words
The normal butane partial oxidation catalyst structure according to claim 2 wherein Me is Cu, Ag, Zn, Cd, Al, Ga, In, Sc, Y, La, Ge, Sn, Pb, Ti, Zr, Sb, Bi, As, Fe, Co, Ni, Ce, Pr, Nd, Cr, Li, Na, K, Rb, Fr, Nb, Te, W, Pd, Mn, Mo, Re, Sm, Hf, Ta, Th, U, Sn, B, Si, Mg, Ba, Tb, Eu or mixtures thereof.
Claim 5
Dependent Claim
47 words
The normal butane partial oxidation catalyst structure according to claim 3 wherein Me is Cu, Mo, Ni, Co, Cr, Nd, Ce, Ba, Y, Sm, Te, Zr, W, Pd, Ag, Mn, Zn, Re, La, Hf, Ta, Th, U, Eu, Nb, Ru, Li, Mg, B, Si or mixtures thereof.
Claim 6
Dependent Claim
21 words
The normal butane partial oxidation catalyst structure according to claim 4 where Me is Zn, Si, Li or a mixture thereof.
Claim 7
Dependent Claim
29 words
The normal butane partial oxidation catalyst structure according to claim 1, 2, 3, 4 or 5 wherein said cylinders are in the range of 2 1/2 to 10 mesh.
Claim 8
Dependent Claim
25 words
The normal butane partial oxidation catalyst structure according to claim 6 where said bore is about 30 to 50% of the diameter of said cylinder.
Claim 9
Dependent Claim
20 words
The normal butane partial oxidation catalyst structure according to claim 7 wherein said bore is substantially centered through said cylinder.
Claim 10
Dependent Claim
23 words
The normal butane partial oxidation catalyst structure according to claim 6 wherein the height and diameter of said structure are substantially the same.
References Cited (Backward Citations)
US2078945A
Cited
US2408164A
Cited
US2478194A
Cited
US3798176A
Cited
US3985775A
Cited
US3848033A
Cited
US4178298A
Cited
US4153539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |