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US3728414A
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Olefin disproportionation
Assignee: Shell USA Inc
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Filing: 1970-09-14
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Granted: 1973-04-17
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Expires: 1990-09-14
Abstract
Abstract Olefins are disproportionated in the presence of a novel catalyst composition comprising (a) a conventional olefin disproportionation catalyst, (b) a Group IIIa metal, Group IIIa metal compound or mixtures thereof and (c) a carrier of at least 75 percent alumina. The novel catalyst has a long catalytic lifetime and good disproportionation activity.
Inventors
- 👤 Helden R Van
- 👤 C Kohll
- 👤 P Verbrugge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:05
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/10; C07C2523/16; C07C2523/32; C07C2523/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
The process of claim 1 wherein the olefin hydrocarbon reactants are acylic hydrocarbon monoolefins of up to 40 carbon atoms, cyclic hydrocarbon olefins of up to 4 carbocyclic rings, of up to 12 carbon atoms and up to 3 ethylenic linkages, the carbon atoms of at least one ethylenic linkage being members of a carbocyclic ring of at least five carbon atoms and an alkenyl aromatic compound of 8 to 16 carbOns having at least one ethylenic linkage in an alpha position to the aromatic ring.
Claim 2
Dependent Claim
14 words
The process of claim 1 wherein the olefinic hydrocarbon reactants are isobutene and 2-butene.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the modifier is selected from the group consisting of cerium, europium and didymium.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the disproportionation catalyst is rhenium heptoxide and the modifier is didymium.
Claim 5
Dependent Claim
156 words
In the disproportionation of two olefinic hydrocarbon reactants to a product comprising olefinic hydrocarbons having a total number of carbon atoms equal to the sum of the carbon atoms of the two olefinic hydrocarbon reactants and having a number of ethylenic linkages equal to the sum of the ethylenic double bonds of the two olefinic hydrocarbon reactants by contacting the two olefinic hydrocarbon reactants at 10* to 200*C in the presence of an olefin disproportionation catalyst selected from the group consisting of rhenium compounds and mixtures thereof active for olefin disproportionation supported on a carrier of at least 75 percent aluminum oxide, the improvement which comprises modifying the olefin disproportionation catalyst with 0.05 to 5 percent by weight of a modifier selected from the group consisting of an element of Group IIIA of the Periodic Table having an atomic number of from 21 to 71 inclusive, compounds thereof, and mixtures of said elements and said compounds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |