US4499328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin metathesis and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1983-10-05
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Granted: 1985-02-12
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Expires: 2003-10-05
Abstract
Abstract Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst comprising silica containing tungsten oxide and a promoting amount of silver under conditions suitable for silver to promote the activity of tungsten oxide for the disproportionation reaction.
Inventors
- 👤 Simon G. Kukes
- 👤 Robert L. Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/683; B01J23/687; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 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 silica and tungsten oxide promoted with an effective promoting amount of silver.
Claim 2
Dependent Claim
60 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 silica and tungsten oxide promoted with an effective promoting amount of silver.
Claim 3
Dependent Claim
43 words
A process according to claim 1 wherein said catalytic amount of tungsten oxide is in the range of about 0.1 to about 30 percent by weight of the combined weights of tungsten oxide and silica prior to the addition of the promoting metal.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein the disproportionation is carried out at a temperature in the range of about 20° C. to about 600° C.
Claim 5
Dependent Claim
45 words
A process according to claim 1 wherein the promoting metal is employed in an amount in the range of about 0.01 to about 10 weight percent, calculated as the metal, based on the weight of the tungsten oxide-silica combination prior to the addition of silver.
Claim 6
Dependent Claim
12 words
A process according to claim 1 wherein said feed olefin comprises propylene.
Claim 7
Dependent Claim
13 words
A process according to claim 1 wherein the olefin feed additionally contains ethylene.
Claim 8
Dependent Claim
52 words
A process according to claim 1 wherein the catalyst is formed by admixing calcined silica-tungsten oxide with at least one of silver, silver oxide and silver compounds convertible to silver oxide, and subjecting same to calcination conditions suitable for silver to promote the activity of tungsten oxide for the disproportionation of olefins.
Claim 9
Dependent Claim
34 words
A process according to claim 7 wherein silver nitrate is admixed with a calcined silica-tungsten oxide catalyst, dried, and calcined at a temperature in the range of about 300° C. to about 800° C.
Claim 10
Dependent Claim
12 words
A process according to claim 8 wherein said feed olefin comprises propylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |