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Patent US4517401A successfully refreshed from Google Patents.
US4517401A
Expired / Lapsed
US
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Olefin metathesis and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1983-07-26
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Granted: 1985-05-14
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Expires: 2003-07-26
Abstract
Abstract Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising an inorganic refractory oxide support containing at least one of tungsten oxide and molybdenum oxide and a promoting amount of at least one methylating agent under conditions suitable for the methylating agent compounds to promote the activity of tungsten and molybdenum oxides for the disproportionation reaction.
Inventors
- 👤 Simon G. Kukes
- 👤 Robert L. Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:39
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A process for disproportionating olefins comprising contacting at least one feed olefin having at least 3 carbon atoms per molecule under suitable reaction conditions which convert the feed olefin into other olefins having different numbers of carbon atoms with a catalytically effective amount of a catalyst composition comprising an inorganic refractory oxide and at least one metal oxide selected from molybdenum oxide and tungsten oxide promoted with an effective promoting amount of a methylating agent.
Claim 2
Dependent Claim
75 words
A process for disproportionating olefins comprising contacting at least one feed olefin having at least 3 carbon atoms per molecule under suitable reaction conditions which convert the feed olefin into other olefins having different numbers of carbon atoms with a catalytically effective amount of a catalyst composition comprising an inorganic refractory oxide and at least one metal oxide selected from molybdenum oxide and tungsten oxide promoted with an effective promoting amount of a methylating agent.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein said inorganic refractory oxide is selected from silica, alumina, and mixtures thereof.
Claim 4
Dependent Claim
45 words
A process according to claim 2 wherein said catalytic amount of said metal oxide is in the range of about 1 to about 20 percent of the combined weights of said metal oxide and said refractory oxide prior to the addition of the methylating agent.
Claim 5
Dependent Claim
26 words
A process according to claim 3 wherein the disproportionation is carried out at a temperature in the range of about 20° C. to about 600° C.
Claim 6
Dependent Claim
44 words
A process according to claim 4 wherein the methylating agent is employed in an amount in the range of about 0.1 to about 20 weight percent based on the weight of the metal oxide-refractory oxide combination prior to the addition of the methylating agent.
Claim 7
Dependent Claim
21 words
A process according to claim 5 wherein said metal oxide is WO 3 and said refractory oxide is SiO 2 .
Claim 8
Dependent Claim
13 words
A process according to claim 6 wherein said methylating agent is dimethyl sulfate.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein said feed olefin comprises propylene.
Claim 10
Dependent Claim
13 words
A process according to claim 1 wherein the olefin feed additionally contains ethylene.
Claim 11
Dependent Claim
12 words
A process according to claim 7 wherein said feed olefin comprises propylene.
References Cited (Backward Citations)
US3940346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |