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US4487986A
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Olefin disproportionation and catalyst therefore
Assignee: Phillips Petroleum Co
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Filing: 1980-10-09
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Granted: 1984-12-11
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Expires: 2000-10-09
Abstract
Abstract An improved olefin disproportionation catalyst produced by contacting (a) molybdenum or tungsten oxide supported on inorganic refractory oxide, and (b) a metal dithionite.
Inventors
- 👤 Semyon Kukes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:04
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A process for the disproportionation of olefins comprising contacting at least two non-conjugated olefinic reactants under suitable reaction conditions with a catalytic amount of a catalyst composition produced by admixing an inorganic refractory oxide containing a catalytic amount of at least one metal oxide selected from molybdenum oxide or tungsten oxide with a promoting amount of a dithionite salt of the formula Me x S 2 O 4 wherein Me is a metal selected from Groups IA and IIB of the Periodic Table of the Elements and x is an integer sufficient to satisfy the valence requirements.
Claim 2
Dependent Claim
97 words
A process for the disproportionation of olefins comprising contacting at least two non-conjugated olefinic reactants under suitable reaction conditions with a catalytic amount of a catalyst composition produced by admixing an inorganic refractory oxide containing a catalytic amount of at least one metal oxide selected from molybdenum oxide or tungsten oxide with a promoting amount of a dithionite salt of the formula Me x S 2 O 4 wherein Me is a metal selected from Groups IA and IIB of the Periodic Table of the Elements and x is an integer sufficient to satisfy the valence requirements.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein said inorganic refractory oxide is selected from the group of 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 dithionite salt.
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
43 words
A process according to claim 4 wherein the dithionite salt 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 dithionite.
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
12 words
A process according to claim 6 wherein said dithionite is sodium dithionite.
References Cited (Backward Citations)
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |