US4046833A
Expired / Lapsed
US
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Dehydrogenation of paraffins
Assignee: Standard Oil Co
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Filing: 1975-12-22
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Granted: 1977-09-06
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Expires: 1995-12-22
Abstract
Abstract A process for the dehydrogenation of paraffinic hydrocarbons containing from 3 to 6 carbon atoms to the corresponding monoolefin, wherein the process is carried out in the vapor phase, in the presence of oxygen and in the presence of an improved oxidative dehydrogenation catalyst containing vanadium and aluminum.
Inventors
- 👤 Harley F. Hardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:00
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/847; B01J23/8472; B01J23/16; B01J23/20; B01J23/22; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
156 words
The process for the dehydrogenation of paraffinic hydrocarbons containing from 3 to 6 carbon atoms to the corresponding monoolefins comprising contacting said paraffin with molecular oxygen over a catalyst at a temperature of from about 400° to 700° C., a pressure of from about one atmosphere up to about 3 atmospheres, and wherein the molar ratio of paraffin to oxygen is in the range of from about 1:0.04 to 1:10; said catalyst having the composition: A.sub.a V.sub.b Al.sub.c O.sub.x wherein A can be one or more of the metals selected from Groups IIA, IIB, VIB, and VIII of the Periodic Table, and wherein a is a number from 0 to 3, b is a number from 0.25 to 5, c is a number from 0.5 to 25, and x is a number determined by the valence requirements of the metals of A, vanadium and aluminum, and wherein said catalyst is heat-treated in the presence of oxygen.
Claim 2
Dependent Claim
156 words
The process for the dehydrogenation of paraffinic hydrocarbons containing from 3 to 6 carbon atoms to the corresponding monoolefins comprising contacting said paraffin with molecular oxygen over a catalyst at a temperature of from about 400° to 700° C., a pressure of from about one atmosphere up to about 3 atmospheres, and wherein the molar ratio of paraffin to oxygen is in the range of from about 1:0.04 to 1:10; said catalyst having the composition: A.sub.a V.sub.b Al.sub.c O.sub.x wherein A can be one or more of the metals selected from Groups IIA, IIB, VIB, and VIII of the Periodic Table, and wherein a is a number from 0 to 3, b is a number from 0.25 to 5, c is a number from 0.5 to 25, and x is a number determined by the valence requirements of the metals of A, vanadium and aluminum, and wherein said catalyst is heat-treated in the presence of oxygen.
Claim 3
Dependent Claim
20 words
The process in claim 1 wherein the contact time is in the range of from about 0.1 to 25 seconds.
Claim 4
Dependent Claim
50 words
The process in claim 2 wherein a in the formula is a number from 0.1 to 1.5, b is a number from 0.5 to 1.5, c is a number from 1 to 16, and x is a number determined by the valence requirements of the metals A, V and Al.
Claim 5
Dependent Claim
29 words
The process in claim 3 wherein A in the formula is at least one element selected from the group consisting of magnesium, zinc, chromium, uranium, nickel, iron and cobalt.
Claim 6
Dependent Claim
14 words
The process in claim 1 wherein the catalyst is supported on a carrier material.
Claim 7
Dependent Claim
11 words
The process in claim 2 wherein the paraffinic hydrocarbon is propane.
Claim 8
Dependent Claim
11 words
The process in claim 2 wherein the paraffinic hydrocarbon is isobutane.
Claim 9
Dependent Claim
11 words
The process in claim 2 wherein the paraffinic hydrocarbon is n-butane.
Claim 10
Dependent Claim
24 words
The process in claim 3 wherein steam is employed as a diluent in concentrations of up to 25 moles per mole of hydrocarbon fed.
Claim 11
Dependent Claim
86 words
The catalyst having the composition: A.sub.a V.sub.b Al.sub.c O.sub.x wherein A is one or more of the metals selected from the group consisting of magnesium, zinc, chromium, uranium, iron, nickel and cobalt, and wherein a is a number from 0.1 to 1.5, b is a number from 0.5 to 1.5, c is a number from 1 to 16, and x is a number determined by the valence requirements of the metals A, vanadium and aluminum; and wherein said catalyst is heat-treated in the presence of oxygen.
Claim 12
Dependent Claim
86 words
The catalyst having the composition: A.sub.a V.sub.b Al.sub.c O.sub.x wherein A is one or more of the metals selected from the group consisting of magnesium, zinc, chromium, uranium, iron, nickel and cobalt, and wherein a is a number from 0.1 to 1.5, b is a number from 0.5 to 1.5, c is a number from 1 to 16, and x is a number determined by the valence requirements of the metals A, vanadium and aluminum; and wherein said catalyst is heat-treated in the presence of oxygen.
Claim 13
Dependent Claim
29 words
The catalyst composition in claim 10 wherein A is at least two of the metals selected from the group consisting of magnesium, zinc, chromium, uranium, iron, nickel, and cobalt.
Claim 14
Dependent Claim
11 words
The catalyst of claim 11 wherein A is iron and chromium.
Claim 15
Dependent Claim
12 words
The catalyst of claim 11 wherein A is nickel, chromium and magnesium.
Claim 16
Dependent Claim
12 words
The catalyst of claim 11 wherein A is iron, chromium and magnesium.
Claim 17
Dependent Claim
9 words
The catalyst of claim 10 wherein A is iron.
References Cited (Backward Citations)
US3856881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |