US3725496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin disproportionation process
Assignee: Gulf Research and Development Co
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Filing: 1971-03-17
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Granted: 1973-04-03
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Expires: 1991-03-17
Abstract
Abstract A process for converting, by disproportionation, an olefin, particularly an alpha-olefin, to a product containing a mixture of olefins of higher and lower carbon number than at least one of the olefins in the olefin charge, which involves contacting the olefin charge under disproportionation reaction conditions including a temperature from 15*C. to 120*C. with a catalyst composition containing molybdenum, cobalt-molybdenum, tungsten or rhenium on an alumina containing support. The catalyst is initially pretreated with an olefin having two to 10 carbon atoms at a temperature higher than the reaction temperature.
Inventors
- 👤 T Kobylinski
- 👤 H Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B; B01; B01J; B01J37/00; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
26 words
A process according to claim 1 wherein the catalyst comprises molybdenum on alumina and the olefin to be disproportionated has from three to 30 carbon atoms.
Claim 2
Dependent Claim
44 words
A process according to claim 2 wherein the monoolefinic hydrocarbon used to pretreat the catalyst has from three to eight carbon atoms and the temperature used to pretreat the catalyst is from 175* to 320*C. for a time from 30 seconds to one hour.
Claim 3
Dependent Claim
17 words
A process in accordance with claim 3 wherein the olefin used to pretreat the catalyst is 1-butene.
Claim 4
Dependent Claim
14 words
A process according to claim 4 wherein the olefin to be disproportionated is 1-octene.
Claim 5
Dependent Claim
114 words
A process for the pretreatment of a catalyst consisting of alumina and at least one metal selected from Mo, W and Re which comprises: contacting said catalyst with a monoolefinic hydrocarbon having from three to eight carbon atoms per molecule at a temperature higher than the disproportionation reaction temperature but less than 320*C. for a time of at least 30 seconds and thereafter using said pretreated catalyst for the disproportionation of at least one monoolefin having from three to 30 carbon atoms per molecule or a mixture of at least one monoolefin having from three to 30 carbon atoms per molecule with ethylene under disproportionation reaction conditions including a temperature from 15* to 120*C.
Claim 6
Dependent Claim
197 words
A process for the disproportionation of at least one monoolefin having from three to 30 carbon atoms per molecule or a mixture of at least one monoolefin having from 3 to 30 carbon atoms per molecule with ethylene which comprises: contacting said olefin with a pretreated catalyst comprising molybdenum, cobalt-molybdenum, tungsten or rhenium on a support consisting of alumina under disproportionation reaction conditions including a temperature from 15* to 120*C, the pretreatment for said pretreated catalyst comprising contacting said catalyst with a monoolefinic hydrocarbon having from three to 10 carbon atoms per molecule at a temperature from 175* to 320*C. for a time of at least 30 seconds; continuing to Contact said olefin to be disproportionated with said pretreated catalyst for a time sufficient to deactivate said catalyst; regenerating said catalyst by heating in the presence of a gas containing free molecular oxygen at a temperature from 400* to 600*C.; flushing said regenerated catalyst with an inert gas; cooling said regenerated catalyst to a temperature from 175* to 320*C.; and repeating said pretreatment; flushing said pretreated catalyst with an inert gas; cooling said pretreated catalyst to a temperature from 15* to 120*C.; and repeating said disproportionation reaction.
Claim 7
Dependent Claim
14 words
A process according to claim 7 where the olefin to be disproportionated is 1-octene.
Claim 8
Dependent Claim
16 words
A process according to claim 1 wherein the olefin used to pretreat the catalyst is isobutylene.
Claim 9
Dependent Claim
16 words
A process according to claim 1 wherein the olefin used to pretreat the catalyst is 1-octene.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |